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Category --
 Process: 0. Corrosion. Compatibility, Choosing a Finish
 Preparation: 1a. Mechanical Prep 1b. Chemical Pretreatments 1c. Masking & Racking
 Inorganic Finishing: 2a. Anodizing & Light Metals 2b. Electroplating & Electroforming 2c. Electroless Plating
2d. PVD, CVD, Vacuum Processes 2e. Galvanizing, Hot Dipping 2f. Black Oxide, Bluing, Coloring
2g. Other Inorganic Finishing Processes
 Organic Finishing: 3a. Electropainting, Autophoretic 3b. Powder Coating 3c. Lacquers, Clearcoats
3d. Painting, Printing, Adhesives, Organic Coatings
 Post-treatments: 4a. Chemical Post-treatments 4b. Baking & Non-chemical Post-treatments 4c. Stripping, Reworks, etc.
 Supporting Issues: 5a. Analysis, Lab Technique, QA/QC 5b. Water, Wastewater, Pollution 5c. Safety, Emissions, Toxicity
5d. Plant & Process Engineering 5e. Software, Specs, Books, Stats 5f. World Wide Word Of The Week
5g. REACH, RoHS, E-O-L, etc. 5h. Mostly metallurgy
 Non-industrial: 6a. Hobbyists, Enthusiasts, Artists 6b. Research, Thesis work 6c. K-12 Science Projects, Elementary to High School
 Not Metal Finishing: 7. Off Topic, but Interesting

legend:

(    )= Date in parentheses is most recent posting on the thread
open Q.= Thread currently ends with a question or the site curator's inconclusive musings
opinion!= Comments may raise blood pressure
silly :-)= For those with a sense of humor
video= Contains embedded video
camera= The inquiry has photos / graphics
pdf= Contains embedded pdf
vip= Inquirer often helps others, so especially deserves our help

0. CORROSION, COMPATIBILITY, CHOOSING A FINISH . . .

60644. Coating System for Corrosion Category 5 Structures (December 15)
03354. Will type 304 SS buttons rust in a washing machine? (December 15)
41460. How to get Dull Surface on Stainless Mesh camera (December 15)
51980. Finishes for Bolts on Galvanized Structural Steel (December 15)
25809. Need finish recommendation for stainless steel battery contact (December 15)
13807.
High friction coating for aluminum or SS rod (December 15)
16063. Ideal finish for screws holding circuit boards (December 15)
46184. Non-magnetic Material for Bearing Slot (December 15)
42140. Zn-Ni Plated Screws for ACM Panel Framing? (December 10)
60639. Alternative to Hot dip Galvanizing for Household Gas Tanks open Q. (December 1)
60560. Recommended bronze and black finish for stainless steel household product (November 28)
45692. Galvanic Corrosion problems between mating contacts (November 22)
27167. Galvanic corrosion issues: aluminum and stainless steel camera open Q. (November 15)
41930. Galvanic Corrosion between Galvanized Steel and Aluminum (November 3)
35984. Finish to withstand 500 hours of Salt Spray to White Corrosion (October 31)
55707. Chem film, anodization, aluminum/Copper, Ni or tin (October 24)
60534. Is rust contagious? (October 24)
45662. How to protect inside of pipes from rusting after pickling (October 23)
53205. Combining metallic and organic finishes (October 20)
07897. Galvanic compatibility of aluminum and copper (October 12)
60526. Need black plating resistant to KOH open Q. (October 11)
60525. Polyester powder paint finish vs zinc phosphate finish (October 10)
03066. Aluminum Anodizing vs. Powder Coating open Q. (October 7)
60502. Hard black surface for raised vegetation beds open Q. (September 1)
07984. What metals can resist hydrochloric acid? (August 29)
03224. What material should blasting and jetting nozzles be made from? (August 27)
60496. Non porous and non conductive coating for stainless steel (August 25)
60495. SS304 Nuts are corroding, but not Bolts or washers or anything else (August 22)
35456. Salt fog expectations for electroless nickel plating, B4C, black oxide, Raydent coatings (August 18)
60492. Identify this finish from the picture camera open Q. (August 17)


1. PREPARATION . . .

    1a. MECHANICAL PREP
    [GRINDING, POLISHING, VIBRATORY FINISHING, BUFFING, HONING]

30941. Measuring/specifying surface finish on Circular Lay Pattern camera open Q. (November 27)
14468. Formula for polishing paste for steel sheets open Q. (November 21)
58397. Finishing stainless steel eyeglass frames (November 20)
06053. Want shiny finish on stainless steel bolts/screws (November 16)
00376. Mechanical polishing vs. electropolishing of stainless steel camera (October 30)
41946. Pickling steel in phosphoric acid open Q. (October 20)
13730. Making a mirror surface in a Dia 2.5 mm hole in SUS316 (October 19)
60507. Metal Finish-How Do I Get The Matte Look? camera (September 26)

    1b. PRETREATMENTS
    [PICKLING, PASSIVATION, PHOSPHATIZING, CLEANING, ELECTROPOLISHING, ACTIVATION]

26974. Which chemical to add to HCl to remove iron to recycle the acid? (December 15)
09146. Electropolishing of Brass (December 12)
43921. Removal of mineral oil before electroplating (December 8)
01264. De-scaling of Hot Rolled black Steel, Flats & Bars open Q. (December 1)
50566. Titanium etch chemical ratios open Q. (December 1)
20475. Manganese Phosphate pits question (November 22)
11822. Passivating carbon steel pipe for DI water (November 17)
00479. Pickling & passivating TIG welded stainless (November 13)
25398. HCl-free pickling of HSLA, DP, & TRIP steel open Q. (November 6)
12926. Electropolishing with citric acid camera (November 3)
51028. Controlling Manganese Phosphate Coating Thickness (October 30)
32581. One stage cold phosphating vs. 7-stage hot phosphating (October 24)
60538. Will TCE at 187 °F Hurt Silver? open Q. (October 24)
46041. Electropolishing 4xx stainless steel camera open Q. (October 19)
04561. Cleaning Molybdenum parts; Molybdenum and Hydrocarbons open Q. (October 19)
24520. Anodizing of stainless steel open Q. (October 18)
47682. Electropolishing chrome cobalt alloys (October 15)
59655. Passivate on 4130 Steel (October 15)
16827. Improving the Composition of our Zinc phosphating process (October 10)
44342. Crystallization Of Hydrochloric Acid Problem in Pickling System (October 7)
11762. Passivation / Electropolish -- Proper Sequence? camera (October 4)
12028. Why does dry pickled steel rust rapidly? (October 3)
60447. Reducing smallest trace of salt on the surface before coating open Q. (October 2)
27305. White Patches on Cold Rolled Sheet open Q. (September 28)
31949. How to Maintain Phosphate Accelerator Pointage during Continuous Running of Circulation Pumps (September 28)
00628. Passivating type 416 & 416Se stainless steel camera (September 22)
00019. How to Blacken Stainless Steel camera open Q. (September 20)
02258. Pink gold will not electropolish open Q. (September 20)
01134. Electropolishing High Strength Steel open Q. (September 19)
10882. Chemical and electrochemical etching of stainless steel open Q. (September 16)
33815. Sulphamic Acid Management for Nickel-Titanium pickling and descaling open Q. (September 13)
29208. Can Citric Acid Be Mixed with Naphtha to Remove Iron Sulfide Scale? open Q. (September 13)
09178. How To Remove Oxide Film on Titanium Alloy? open Q. (September 6)
17826. Zinc phosphate abrades off in wire extrusion open Q. (September 6)
56202. Stainless steel passivation color inconsistent, changes camera open Q. (September 1)
04947. Chrome-free Alternatives for Bright Dip of Copper and Brass open Q. (August 31)
10704. Straight caustic soda or HCl pluss grass as a degreaser open Q. (August 18)
01134. Electropolishing of Carbon Steel Crankshaft open Q. (August 17)
00960. Black Zinc Phosphate open Q. (August 16)
37180. Descaling of Heat Treated Parts (August 14)
45662. Which is better: "Shot blasting" or "7-Tank phosphating process" (August 13)
13366. Problems and solutions in zinc phosphating open Q. (August 13)
34755. How to set up a DIY Electropolishing system for stainless steel open Q. (August 13)
60474. How much HCl is consumed by rust? No room for acid additions (August 8)
60479. EP Phosphate Coating on 1065 Steel Leaf Spring - Resolving Fatigue Reliability Issue camera (July 31)
48252. White hazy finish after descaling Titanium camera open Q. (July 27)

    1c. MASKING, RACKING, TAPING, PLUGGING, PHOTOSENSITIVE MASKS

58316. Liquid masking for anodizing open Q. (October 20)


2. INORGANIC FINISHING PROCESSES . . .

    2a. ANODIZING AND LIGHT METAL TREATMENTS (Aluminum, Magnesium, Titanium)

41079. Titanium Deox/etch (December 12)
14352. Grain structure visible through anodising camera open Q. (December 9)
11001. Hiding scratches on brushed bronze finish anodized aluminum (December 6)
44433. 6061-T6 Panels Fail Salt Spray after Treatment with Alodine camera open Q. (December 6)
03362. Paint adhesion failures over Mil-C-5541 chromate conversion coating (December 5)
42754. Anodizing to a matte black finish (November 20)
06326. Odd overly matte surface finish noticed after anodizing (November 20)
51933. Rare 1935 Bugatti Showcar with Magnesium Body Needs Protective Surface! (November 19)
27504. What causes large crystals to form in the anodize tank? camera open Q. (November 18)
58771. Spotting on aluminum parts with chromate finish open Q. (November 16)
32137. Burning problem in hard anodizing (November 13)
19121. FPL Etch Q&A's, Problems & Solutions open Q. (November 13)
15048. Blotched areas on Clear Anodize, Material or Plating problem? camera (November 10)
60548. Magnesium parts ruined -- was it by deoxidizing? Is chemical etching 'deoxidizing'? (November 1)
09196. Alodine 5200 for Magnesium? open Q. (October 26)
04558. MIL-C-5541 / MIL-DTL-5541 Class 1a vs. Class 3 Chromate Conversion Coatings open Q. (October 24)
14847. Safe alkaline etching of aluminum (October 24)
03464. Spalling of sulphuric acid anodizing open Q. (October 19)
12517. Weld showing after MIL-DTL-5541 (October 18)
60527. Impact of power cut on anodizing coat and colour (October 17)
42739. Smut on conversion coated aluminum parts (October 17)
22258. vip Brown stains on chromic acid anodising camera open Q. (October 17)
30899. Best practices for QC of anodised surfaces (October 17)
25040. Yellow Powder on Aluminum Parts after Chemical Polish open Q. (October 16)
46180. Why Not Copper Racks for Anodizing? (October 15)
22602. Method for determining type of coloring process used in Al anodizing open Q. (October 11)
45728. How to eliminate powdery condition of Alodine 1200S (October 11)
11686. Yellow chromate formulation open Q. (October 7)
10893. Sharpening up an Alodine 1132 Touch Up Pen (October 3)
22139. Satin Anodized Aluminum camera open Q. (October 3)
00937. Anodizing titanium and niobium in black open Q. (September 23)
01819. Thickness of teflon impregnated anodizing (September 22)
30544. Quality Salt Spray Panel Vendors? (September 20)
44895. Chromate conversion coating of aluminum is greyish-blue instead of yellow (September 20)
21510. Aluminum electropolishing Q&A's: white spots when touched after drying (September 19)
56581. Rainbow effect / defect on anodized aluminum? (September 17)
41095. Acid leaks into tapped holes during anodizing process camera (September 7)
27034. MIL-C-5541 Class 1A vs. Class 3 (August 29)
00332. Stains/Discoloration on our Anodized Aluminum open Q. (August 28)
60498. Can etched & de-smutted parts be delayed before anodizing ? (August 28)
56240. How to avoid tool marks when anodizing (August 26)
01085. Brush anodizing / Anodizing Pen for Touch-ups open Q. (August 21)
38525. Trivalent chromate vs. chrome-free conversion coating (August 21)
01263. Electrocoloring: Stannous sulphate in liquid vs. powder form open Q. (August 18)
22496. Anodising directly over natural oxide layer (August 17)
12880. Plating a Large Cast Aluminum Rotational Mold open Q. (August 12)
33933. Masking/stripping when chromate conversion and anodizing on same part (August 4)
02197. Chromic vs. Sulfuric Anodize. Boric-Sulfuric as Substitute? open Q. (August 3)
60487. Aluminum Conversion Coating: US Equivalent to Alodine 160/161 open Q. (August 2)
13775. How to Alodine ADC12 (July 29)
45834. How to print patterns onto Anodized Aluminum (July 28)
60302. Runs streaks in type III black dye (July 27)

    2b. ELECTROPLATING and ELECTROFORMING

25024. Electrodeposition of Titanium open Q. (December 15)
33576. Black chrome adhesion problem (December 15)
00476. Which zinc plating is best for cast iron, acid or alkaline camera (December 15)
44771. Reducing Sulfate level in a Copper Bath (December 9)
41906. Removing Copper & Iron from Acid Zinc Plating Bath (December 9)
33784. Blisters in Nickel plating on diecast parts camera open Q. (December 6)
37918. Electroplating of iron onto copper soldering iron tips (December 5)
40243. How to zinc-nickel plate the I.D. of tubing (December 2)
52070. Pin holes problem in hard chrome plating open Q. (November 29)
45895. How to fill pits in castings for nickel plating? open Q. (November 29)
05156. Plastic moldings have scratches despite chrome plated mold open Q. (November 28)
60515. Bad finish around hang/hole in Nickel-Chrome plating camera (November 28)
47037. Chromate conversion on cadmium not adhering (November 26)
04207. Bright Nickel Plating - Burnt on HCD area (November 25)
11955. Chrome Plating Problems on Gravure Printing Cylinders/Rolls (November 24)
40136. What is Maximum Hard chrome plating Thickness? (November 24)
07049. Hard Chrome Plating of Piston Crowns (November 13)
02406. Problems in ammonia chloride zinc plating: Q&A's (November 10)
25248. Wood's Nickel Strike Bath Analysis & Maintenance (November 10)
60528. Arcing burning in cadmium plating camera (November 10)
60554. Nodule Problem in Cadmium Sulphate Plating camera (November 9)
60553. How to get very high quality Chrome Finish on Brass (November 8)
24506. Copper plating steel grounding (earthing) rods camera (November 7)
56727. Gold Plating Iphones and mobile phones (November 6)
18697. vip Nickel distribution (November 6)
15353. Coupling, chips sticking together during barrel plating (November 6)
11800. Acid Copper Plating: misc. issues and problems camera (October 31)
30679. Tin Plating onto 430 BA (bright annealed) SS open Q. (October 30)
57468. Cleaning cadmium substrates for plating gold on them open Q. (October 26)
55075. Chrome chipping occurring in Rails of 3 piece Oil Ring open Q. (October 25)
60537. Upper thickness limit for cyanide brass plating? open Q. (October 24)
52562. Color gold - color gilding: Rose / pink /red / brown gold plating issues (October 24)
12634. What to substitute for unavailable Nickel S-Rounds? (October 15)
22092. Black Rhodium vs Black Ruthenium wear resistance open Q. (October 12)
10037. Chrome plating is too soft open Q. (October 6)
60520. Cu & Sn Anode balls Utilization Improvementopen Q. (October 6)
51694. Huge and hair-like crystals when plating at high current open Q. (October 6)
40831. Zinc plating fails 48 hours salt spray (October 4)
44753. Electroplating diamond grit onto steel tools open Q. (October 3)
05302. Nickel Chrome Plating: Micro-Pitting on Plating (October 3)
60508. Need a plating recommendation for electrical application (September 26)
47730. Poor adhesion of acid copper plating onto steel (September 20)
00323. Thick copper plating for bullets open Q. (September 15)
60504. Zinc w/Trivalent Passivization Compatibility with NiCu EMI Gasket open Q. (September 8)
10889. Do I need to de-rust parts before sending out for cadmium plating? (September 5)
05188. Tin Anodes Turn Black After 2 days (August 31)
58218. Can we do architectural balustrades in yellow zinc? (August 29)
25146. Passivation of Stainless Steel after Chrome Plating (August 29)
23909. Zinc Plating on FM Steel and Ductile Iron Issues camera (August 28)
34692. Gold plating imitation jewelry (August 23)
27089. Electrodeposition of Tungsten open Q. (August 20)
02501. Chrome repair of undersize parts open Q. (August 20)
37641. Electroformed Nickel Cobalt alloy, heat treatment info? (August 18)
50564. Delayed Blistering in Alkaline Zinc Electroplating (August 12)
47325. Purple Hue on Clear Chromated Parts (August 8)
03795. Ideal Anode to cathode distance in Nickel plating (August 4)
46369. Buffer for nickel electrowinning (August 4)
32795. Need help to make chrome brush plating solution open Q. (August 3)
01185. Sn/Pb plateout (August 2)
52165. Gold plating of aluminum camera (August 2)
40962. Tin Refining Additives open Q. (July 31)
04169. Iron contamination / buildup problem in acid zinc plating open Q. (July 31)
35361. Pyrophosphate and non-cyanide copper strike/plating process problems and solutions open Q. (July 30)
48281. Plating zinc die casting without copper cyanide strike open Q. (July 30)
15809. Can't get jet black with trivalent chromate open Q. (July 28)

    2c. ELECTROLESS PLATING, PLATING ON PLASTICS, IMMERSION PLATING

11290. Difference between Nickel plating and Electroless Nickel plating (December 7)
51932. Moisture exuding from black electroless nickel plating during bake (December 7)
00601. Electroless Copper Plating on Alumina/Aluminum Thin Films open Q. (November 28)
24339. Why did electroless nickel turn green when heat treated? (November 24)
25680. Nickel boron nitride, other mold release coatings open Q. (November 15)
56574. Palladium activation for electroless nickel process open Q. (November 14)
56751. Want to do GREY Electroless Nickel Plating (November 6)
20253. Cationic surfactant for Ni-PTFE electroless plating (November 1)
48996. Stripping Hardcoat or Anodized Coating on Aluminium open Q. (October 13)
45977. EN Staining Issues (October 10)
39979. Water based acid which to remove silicone (POP process) (September 8)
00868. Pits on ground electroless nickel plating (August 28)
37785. EN Ni-P plating works by DC supply only (August 10)
60486. Bottom-up fill electroless copper plating technology applicability open Q. (August 2)

    2d. PVD, CVD, ION IMPLANTATION, VACUUM PROCESSES

07846. Exact way to get Rose Gold pantone color 10155C with PVD? open Q. (December 8)
09739. Applying Nickel to Aluminum by PVD (November 24)
60539. Can IPG be done on zinc alloy parts? open Q. (October 24)
07846. PVD coating on stainless: is clearcoat needed (September 7)
35541. How to achieve a Black PVD finish on Stainless Steel open Q. (August 14)

    2e. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

25997. Prevention and removal of white rust on galvanizing (December 15)
40753A.Are zinc ingots added to galvanizing tank while it's running? (December 11)
51217. Types of zinc used for galvanizing (November 25)
56867. Galvanizing discoloration camera (November 18)
52776. Pre-Galvanized vs. Post-Galvanized Sheet (November 14)
00009. Black and white spots on passivated HDG metal parts (November 6)
58242. Which is better Looking, Coating over GI or Coating over phosphated CRCA? (November 3)
34420. Galvannealed versus Galvanized (October 20)
57860. How to avoid Fish-boning on galvanized surface camera (October 20)
01797. Hot dip tinning to fix poor adhesion of zinc? open Q. (October 17)
59756. Black Zinc Plating over already galvanized lag bolts? (October 10)
56573. Galvanizing Pot Temperature -- Ideal zinc temperature for galvanizing? open Q. (October 3)
09924. Hot Dip Galvanize vs. Zinc Plating camera (September 24)
58479. Wiping pad questions for wire galvanising? open Q. (September 19)
49676. Estimating material & labor cost of galvanizing open Q. (September 12)
58242. GI (galvanized) sheet vs. CRCA for rust prevention and corrosion protection (September 12)
60499. High Cost of Using Bad Flux in Hot Dip Galvanizing open Q. (August 30)
47082. Can inserting copper screws in threaded holes reliably prevent galvanizing? open Q. (September 6)
41209. Lowering Iron (Fe) in Galvanizing plant flux tank (August 31)
45719. What factors influence galvanizing ash production? (August 29)
57163. Dust-like stain on galvanized steel camera (August 26)
24491. Protecting edges of galvanized cable trays open Q. (August 13)
53170. Galvanizing irregularities & defects open Q. (August 12)

    2f. BLACK OXIDE, BLUING, COLORING, PATINATING, NITRIDING

00982. Gunsmith Bluing (December 1)
04469. Cold Rust Bluing Methods (November 16)
06688. H13 Steel turning Brown with the black oxide process open Q. (November 10)
43001. Blackening on nitrided SS 430 engine valves wears off open Q. (November 5)
13935. Hot Black oxide is rubbing off (November 3)
13797. Post treatments for Black Oxide -- Chromic Acid Dip? (November 1)
01150. The black oxide process and gun bluing (November 1)
11740. Black oxide formula for Hot Blueing of Guns/Firearms (September 12)
47534. Galvanising is bridging a gap (July 24)


    2g. OTHER INORGANIC FINISHING: Mechanical Plating, QPQ, Metal Spray, Zinc-rich Dip-Spin Coatings, etc.

24405. Hot-dip Galvanizing vs. Zinc-rich Dip-spin Coatings open Q. (December 7)
12141. Gas nitriding of H13 Tool Steel open Q. (October 19) 2nd Request
38226. Zinc-Nickel Plating vs. Zinc Flake Coating (October 18)
44399. What is Delta MKS 9000 Coating (October 6)
10012. Field applied Galvanized Zinc Coatings? Cold galvanizing compound spray (October 4)
41952. Poor Dacromet Adhesion open Q. (August 20)


3. ORGANIC FINISHING PROCESSES . . .

    3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS

32574. Anode Cell Area Calculation open Q. (November 27)
51966. How to heat E-coat tank for single shift operation? open Q. (November 10)
34780. Repair E-Coating Scratches? (October 16)
23160. Is it ionic contamination or bacteria? (September 28)
45328. Low pH Problem in CED / E-coating Bath (July 25)

    3b. POWDER COATING

01605. Is Conductive Filler Needed before Powder Coating (December 2)
01180. New Powder Coating plant setup (December 1)
39523. Powder Coat Failure on Aluminum Railings camera (November 26)
42644. Pinhole problems in powder coating camera (November 26)
41802. Problems with Powder Coating over Tin Plating (November 6)
21382. Powder Coating Defects: "Orange Peel" (November 6)
04729. Clear powder coat on 40 year old aluminum - corrosion issues (October 30)
39863. Want 75% gloss powder coating and no phosphate (October 25)
60536. Powder coating on Aluminum Zinc (Aluzinc) coated sheets (October 24)
01926. Can Powder Coat Be Used for Electric Insulation? (October 20)
47025. Is "pre heating" essential for powdercoating? (October 20)
22164. Does zinc plating require pretreatment before powder coating? (October 14)
33851. Powder coating in Faraday area (August 8)
23988. What is root cause of rust on a powder coated steel cabinet? camera (July 29)
43619. Fish eyes in powder coating operation open Q. (July 28)

    3c. LACQUERS, CLEAR COATS, ELECTROPHORETIC TINTING, ANTI-TARNISH

49008. Information about cataphoresis open Q. (December 7)
29961. Clear coating over bronze open Q. (December 4)
23047. How to reduce paint thickness in Cathodic Electro Deposition (CED) system? (November 27)

    3d. PAINTING, PRINTING, ADHESIVES AND OTHER ORGANIC COATINGS

46505. Sublimation Coating Q&A (December 11)
40989. Stoving Enamel open Q. (December 8)
00161. Clear coating copper bathroom accessories open Q. (December 6)
51995. Can't get stains off fluorocarbon paint open Q. (November 28)
60552. Clearcoated bronze plate gets black spots open Q. (November 8)
30522. Clear coating to seal a rust patina finish on metal (November 6)
34052. Manganese Phosphating issues and answers (November 1)
60543. What Coating is this on Aluminum 6082 rods? open Q. (October 26)
24110. Paint touch up on PVDF coated steel door open Q. (October 21)
23536. Spray finish of silver nitrate, "Chrome look" paint" video open Q. (October 10)
48633. Need black wrinkle paint, sprayable by airbrush (October 7)
03988. PVDF oven curing temperature open Q. (September 18)
04014. Suitable Blue Paint for High Temperature 450°C open Q. (September 12)
60497. Varnish Coating line for Electrical Transformers open Q. (August 23)
15909. Mixing Formula for Plastisol open Q. (August 12)


4. POST-TREATMENTS

    4a. CHEMICAL POST-TREATMENTS
    [CHROMATE CONVERSION COATINGS, RUST PREVENTATIVES, PATINAS]

45598. Yellow chromate rubs off (December 13)
40943. Can I specify gloss level for black chromate on zinc plating? (November 28)
17722. Simple test for presence of clear chromate (November 27)
04170. Operating parameters for benzotriazole copper preservative open Q. (November 15)
15889. Copper oxidation inhibitor (October 11)
37592. Nitric Acid Bright-Dip for Sterling Silver open Q. (September 20)

    4b. BAKING AND NON-CHEMICAL POST-TREATMENTS:
    [HYDROGEN EMBRITTLEMENT AND DE-EMBRITTLEMENT, ANNEALING, WHISKERS, SOLDERING, REFLOWING]

46264. Discoloration of Rene 125 Superalloy -- Vacuum Furnace Discoloration? open Q. (October 25)
30700. Acetone doesn't remove lacquer on silver (October 4)
47242. Hydrogen embrittlement relief for parts having areas of different hardness? (August 16)

    4c. STRIPPING, REWORKS, ETC.

08881. Stripping Chrome Plating from Aluminum Alloy Wheels (November 20)
28753. Stripping Tungsten Carbide from I.D housing open Q. (October 28)
60531. How to Remove Silane CVD Coating open Q. (October 17)
48996. Removing HardCoat Anodizing from a large part open Q. (October 13)
46208. Remove seal on anodized aluminum without damaging anodizing open Q. (September 1)
00791. How to Strip Alchromate from Aluminium open Q. (August 21)


5. SUPPORTING ISSUES

    5a. ANALYSIS, LAB TECHNIQUE, Q.A., SALT SPRAY TESTING

13432. Titanium Etch pre FPI (December 12)
35573. Acceptance criteria after salt spray test (December 5)
00885. Determination of Sulphuric acid in an acid copper bath using conductivity meter (November 25)
58336. Cadmium Analysis - Cadmium Cyanide Bath open Q. (November 24)
30658. Copper sulfate passivation test for chrome plated stainless (November 13)
20173. Copper Sulfate Test Method to Verify Zinc Plating? (November 10)
07041. Etching Solutionized AA2024 open Q. (November 6)
53448. Test method for zinc ash content (November 6)
03281. Removing chromate conversion from zinc for coulometric thickness test (October 31)
06060. Test for difference between type 316 and 304 stainless steel (October 25)
04175. Weigh-strip-weigh can't determine light coating on heavy part (October 10)
41485. How to analyze ammonium content in acid zinc plating? open Q. (October 8)
52957. Etching Stainless Steel for Metallography open Q. (August 27)
38505. Plating Adhesion Tests -- Zinc Plating on Steel open Q. (August 21)
00873. How to measure chrome plating thickness accurately in cylinder liner? open Q. (August 21)
50132. Q&As on Operation of ASTM B117 Salt Fog Test Chambers (August 12)

     5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

07022. How to recover silver stripped off copper open Q. (December 15)
02576. pH measurement in D.I. vs. distilled water (December 15)
41896. Reducing NaCl in effluent open Q. (December 11)
27315. Ferric sulphate vs. ferric chloride for water treatment open Q. (December 4)
52466. What is the difference between Cation Conductivity & Electrical Conductivity in Water samples? (November 22)
12873. Silica removal from water via ion exchange (November 18)
45646. Pollution control for silvering & plating process for audio LP vinyl records? open Q. (November 8)
48656. What is difference between Zeolite and Resin? (October 28)
33660. How to improve pH for DM water (October 17)
33620. Inexplicable pH drop in boiler blowdown water open Q. (October 7)
30932. Regenerating resin with high concentration NaOH and HCl open Q. (October 5)
39370. Removal of Zinc from 140000 ppm to 3 ppm in wastewater (September 28)
54447. Pickling acid treatment and re-use open Q. (September 26)
07245. Reducing COD in waste water open Q. (September 24)
06343. Low Cost Hypochlorite Generator Design Needed (September 13)
29862. Need to De-gas a huge volume of water open Q. (August 23)
60494. Convert cooling tower water to make up water for D M Plant camera open Q. (August 21)

    5c. SAFETY ISSUES, EMISSIONS, TOXICITY, ENVIRONMENTAL IMPACTS

22762. Taking copper sulfate with your coffee open Q. (December 15)
20858. Is Mexican Silver Pan Okay for Baking? (December 7)
42258. Lead in the water? (November 30)
07164. Is galvanised steel poisonous? (November 25)
19953. What's the toxic effects of mixing muriatic acid and chlorine (November 24)
40647. Did constant bleach & dog urine exposure cause my heart attack? open Q. (November 20)
35556. Using a U-line chrome plated rack to smoke a pig (October 22)
22597. Water Ionizers. Is it safe to drink alkaline water? open Q. (October 16)
10986. Swallowing Muriatic Acid open Q. (October 7)
16446. Seeking plans on how to build an automotive spray booth open Q. (October 6)
14264. Safety of galvanized park BBQ grills (October 2)
04571. Poisoning from working with chicken wire? open Q. (September 12)
44260. Danger of frequent skin contact with galvanized steel (August 18)
10986. Swallowing Muriatic Acid (August 16)
23964. Is eating food cooked on a chromed cast iron griddle a health concern? open Q. (July 30)

    5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

28498. Fume Control during Hard Chrome Plating (December 4)
17485. Tank Water Evaporation Estimates (December 12)
13877. NFPA Powder Coating Booth Air Exhausting back into shop (November 14)
46503. Removing lime scale from plugged nozzles (November 10)
03254. To use plastic HCl tanks or not (November 9)
39112. How to clean filter press effectively? (November 6)
00897. What should racks for electropolishing Nitinol be made of? open Q. (October 28)
60530. Can gold be recovered practically after plating shop fire? (October 17)
06364. Suggested Way to Bring Power to Titanium Plating Basket (October 16)
60513. Amperage measurements for copper plating bath do not make sense (September 28)
58345. Setting up our electropolishing system open Q. (September 25)
02995. Chilling plant for anodising Q&A's (September 19)
00194. Forklift operators damage tank heaters (September 1)
27533. Equipment and parameters for hard anodizing open Q. (August 28)
60493. Hypalon Rubber Rollers in Pickling Line Are Failing (August 19)
60488. Plating Shop Modernization (August 2)
30044. Scrubbing of NOx fumes open Q. (August 2)

    5e. QUESTIONS ABOUT SOFTWARE, SPECS, BOOKS, INDUSTRY STATISTICS, ETC.

60555. Problem with Certifications Which Aren't Specific open Q. (November 10)
42063. Can we apply MIL-P-23377 Primer ourselves? open Q. (October 25)
13252. Chrome plating adhesion standards (October 20)
44376. Boeing Finish Code Q&As open Q. (October 12)
19726. What licenses are required for hard chrome plating in India? open Q. (October 2)
12526. Sand blasting standards: Swedish SA 1, SA 2, SA 2.5, SA 3 vs. NACE open Q. (September 19)


    5f. WORLD WIDE WORD OF THE WEEK

31203. Is black iron steel the same as high-carbon steel? (November 20)
14356. What does 'L' stand for in 316L? (November 14)
55518 "Low temperature black chrome" coating open Q. (October 31)
35197. Honda Spec "MIC Black"? open Q. (October 18)
33854. Corrolube GFS2 finish? open Q. (October 15)
00097. What is "electroforming"? (October 4)
60500. Canodize (August 29)

    5g. REACH, RoHS, EOL Directive; Cd, Pb, Cr+6, Nitric Acid & Phosphate Replacements

10242. Zinc Phosphate coating problems & issues; Q&A's (December 15)
35470. What's the big deal with RoHS and REACH Compliance? open Q. (November 3)
45993. Tin plating has RoHS-incompatible lead. Where from? open Q. (October 16)
42062. Baking after trivalent chromate (September 22)
39051. RoHS compliant anodizing (August 29)

    5h. MOSTLY METALLURGY

45296. Welding of Duplex Stainless Steel open Q. (November 27)
22586. Is stainless steel hard enough for gun barrels? (November 25)
46948. What makes some brass magnetic? open Q. (November 8)
51470. Hardening EN8 / EN9 parts (November 8)
60547. Stainless Steel which doesn't get magnetic from cold working? open Q. (October 30)
48866. Hardening Type 410 stainless steel open Q. (October 29)
60519. How to anneal silver plated copper & nickel (October 27)
25750. Depth of Hardened Surface of D2 Steel (October 24)
32456. Heat Treating a 4140 axle shaft open Q. (October 18)
12545. How to Anneal Stainless Steel to Soften It open Q. (October 14)
45435. Removing magnetism from 304L Stainless Steel (October 13)
60512. Severe outgassing when welding die cast aluminum parts camera open Q. (September 20)
37534. Rustiness on CF8M material after water testing open Q. (September 18)
28871. Hardening 304 stainless steel open Q. (September 17)
15845. Hastelloy welding question open Q. (September 13)
60505. Black dots in brass castings open Q. (September 6)
49686. Pin Rust and Spot Rust on CRCA Product open Q. (August 17)
39602. Will Alodine harm 4130 bolts? open Q. (August 14)
15043. Copper wire remains hard after annealing open Q. (July 30)


    6a. ARTISTS, HOBBYISTS, CAR BUFFS, HOME OWNERS, ETC.

46603. Copper Tree Electroforming camera open Q. (December 15)
26415. Hobby chrome-look paint (December 13)
13369. Is our elevator actually 304 SS? (December 12)
13035. Bright zinc history question camera (December 12)
60648. Annealing Electroplated Gold (December 11)
16306. Aluminum as an 'art' painting surface open Q. (December 9)
04913. D-I-Y Cleaning before Nickel Plating (December 8)
38061. Directions for Tarn-X Silver Polish (December 8)
45039. Hydrogen Embrittlement During Stripping Process (December 8)
10419. De-chroming wheels and painting or powder coating (December 8)
20967. Gold plating/electroforming of rice (December 7)
17560.
How to build a military patch table (December 7)
60645. Hobbyist Needs UV Reflective Paint for Light Box (December 7)
26845. Can I Use High Temperature Engine Paint on a Stove? (December 7)
34314. How does aluminum foil clean silver open Q. (December 6)
19652. Electroforming with non-cyanide Silver (December 6)
23245. What paint for wellie gumboots? (December 5)
46160. New powder coating over old open Q. (December 5)
60640. Hand painted anodizing camera (December 5)
38628. Gold plating of lead open Q. (December 5)
00085. What copper plating solution for electroforming 150 µ thickness? open Q. (December 5)
02869. Home based electroplating business (December 3)
60643. Surface coat cast iron wheel to protect timber floor (December 2)
08229. Stained bathtub (December 2)
01574. Anodizing with Stepwise Voltage (December 2)
44569. F.B. Rogers Zinc Trivet (November 29)
60636. Turning polished aluminum into a nickel look (more yellow) open Q. (November 28)
01543. Chrome plating repair material and method open Q. (November 28)
09428. Using Ospho inside a gasoline tank? (November 28)
60510. What kind of coating for washing machine's aluminum spider arm? camera (November 28)
09787. Want even patina on pie safe tin (November 28)
60634. Problems with silver PMC jewelry open Q. (November 28)
25850. Comparing stainless steels in cookware open Q. (November 27)
38904. How To Intentionally Rust Metals Such As Jingle Bells & Safety Pins (November 27)
41066. Dishwasher ruined shiny aluminum -- How to fix it? camera (November 27)
18519. Cleaning gold plated flatware (November 26)
33777. Boiling Rings in Peroxide and Vinegar Stops Rash open Q. (November 25)
00934. Coatings for metallizing non conductors open Q. (November 25)
19274. Gold plating aluminum car parts (November 25)
35277. How long can brass last submerged in water? camera (November 22)
15155. Darkening Process for Today's Pewter open Q. (November 20)
60559. Will galvanic corrosion occur if SS chimney cap touches powder coated aluminum shroud? open Q. (November 20)
34446. Muriatic acid stains on stainless steel (November 17)
42007. Painting a galvanized walk-in cooler (November 15)
16945. 101 Q&A's about Corten weathering steel camera (November 14)
29544. Washing machine drain line backs up (November 13)
33774. Gold plating onto stainless steel jewelry (November 13)
36584. Rust on new stainless steel appliances open Q. (November 10)
01198. How to Darken Brass open Q. (November 10)
10770. Looking for Info on Metals Bars camera open Q. (November 10)
43254. How to Make Aluminum Corrode / Patina? open Q. (November 8)
01461. Painting or plating magnesium alloy wheels (November 7)
09128. Copper Sulphate as Swimming Pool Algae Remedy? (November 6)
60549. Plating Solution and Metal Preparation open Q. (November 5)
01130. Aluminum Anodizing: Sulfuric Acid Concentration (October 30)
33099. Rust treatment automobile frame inside and out open Q. (October 30)
41531. How to clean anodized aluminum of cement dust open Q. (October 29)
60546. Smoothing sharp edges on stainless steel shot open Q. (October 29)
09585. How to Remove Varnish from Brass (October 28)
11428. Refinishing a Wood Stove open Q. (October 27)
19039. Cast Iron Cook Stoves: Where to find parts and how to restore (October 27)
24359. Barber Chair Restoration Q&A's and Successes camera open Q. (October 25)
60541. How to determine the silver content in a Chinese Work of Art camera (October 25)
27848. Can I galvanize on top of paint? (October 25)
47437. How to pick and size rectifiers (October 24)
32951. Plating the inside of a gas tank open Q. (October 23)
14342. Stiffel lamp restoration open Q. (October 23)
12362. Coating tables and bar tops with thick clear pourable plastic camera open Q. (October 21)
33616. Gold Recovery for Dummies open Q. (October 19)
00964. How to Anodize and Dye Small Aluminum Parts as a Hobby open Q. (October 18)
39401. Remove copper-nickel layer from quarter without attacking the copper core? (October 18)
43666. Gold plating auto emblems open Q. (October 18)
02456. Zinc Plating at home open Q. (October 17)
10275. How to remove white water rings from wood furniture (October 16)
56585. Anodizing Aluminum without Acid open Q. (October 12)
34769. Mothers Gun Bluing Oil? open Q. (October 11)
46156. Making Genuine Gold Powder from Precipitated Gold? open Q. (October 11)
37838. Nickel plated shower enclosure is blistering (October 10)
28059. Remove rust stains from vinyl siding camera (October 7)
17345. Q&A's on Rhodium plating of silver rings (October 7)
53765. Copper sink turned black open Q. (October 7)
19833. Why is it harmful to let iron phosphate dry before oiling? open Q. (October 3)
19866. Cleaning zinc clad tabletop? Filiform corrosion? camera (September 26)
39679. Mandrel material for Electroforming a thick layer of copper open Q. (September 25)
29224. She sells sea salts simmered in stainless stock open Q. (September 22)
18847. Amateur D-I-Y Copper Plating at Home open Q. (September 20)
42275. Flood damaged Cast Iron Cookware (September 20)
44964. Black Nickel plated part is grey instead of black open Q. (September 20)
22164. Zinc plating vs. galvanizing for a dock (September 19)
37324. Rhodium allergy? open Q. (September 19)
08204. Scratched and dull surface on stainless steel refrigerator door open Q. (September 16)
25866. What makes pennies / Copper coins turn black? open Q. (September 12)
33774. Gold plating over sterling silver? (September 7)
43774. Restoring bleach damaged silver (September 1)
60503. Floor made of 17,500 pennies turned black camera (September 1)
03327. Chrome Plating / Dipping of Rims / Wheels (August 29)
16430. Refinishing outdoor brass coach lights (August 24)
21483. Cleaning, Polishing & Refinishing Bronze Cymbals open Q. (August 23)
10144. Brass crib restoration questions open Q. (August 22)
55546. Lifespan of Corrugated sheet metal in the ground? open Q. (August 21)
35677. Anodizing aluminum and brass together open Q. (August 20)
06082. Difference Between Chrome and Nickel Plating (August 18) open Q.
15419. Plating my rose gold ring with rhodium (August 15)
03331. Home anodizing project in stainless steel tank? (August 15)
60490. What type of wood finish reacts chemically with gold and silver (August 14)
24875. Cleaner for Revereware copper-bottom pots & pans open Q. (August 14)
22132. Will Topaz gemstones withstand gold plating? (August 14)
33780. Rhodium plating on 14 kt white gold necklace. Is it removable? open Q. (August 13)
24253. Polishing brass and painted brass open Q. (August 13)
06062. Voltages for Brush Electroplating open Q. (August 8)
11172. Preparing acid copper brightener (August 7)
08229. Removing stains from bath tubs (August 4)
17903. Muriatic acid rusted our stainless steel appliances (August 4)
20443. Fine silver plating on Sterling silver (August 4)
10270. Rhodium plating a filigreed ring open Q. (August 2)
41124. Q&A's Replating of Silver Rings open Q. (November 8)
42850. Sourcing clear chromate for zinc plated parts (July 31)
21693. Sealing Aluminum to prevent oxidation? open Q. (July 29)
46735. Painting old freezer with rust bleeding through (July 29)
44933. Looking for "NicSand" Aluminum Oxide Sanding Gel open Q. (July 28)

    6b. RESEARCH, THESIS TOPICS, UNIVERSITY & POST-GRAD STUDENTS

02589. Need to make electroless nickel solution to plate stainless & nylon sponges camera (December 9)
02236. Preparation/Extraction of Potassium Cyanide open Q. (December 7)
09721. Modifying salt spray chamber for G85 cyclic testing open Q. (December 2)
60638. Bus bar thickness & soldering relation (December 2)
38265. Electric Conductor Ratings vs. Temperature (November 27)
57025. How can electroplating cathode current have efficiency less than or more than 100%? (November 25)
53795. Chemicals that mix with water for an extreme heat reaction (November 19)
51609. Dichromate parting agent for electroforms isn't working (November 17)
59181. Etching SLA PR48 resin for electroless copper coating (November 17) open Q.
12123. How to formulate PVC Compounds open Q. (November 14)
37096. Best plating/coating for cylinder wall liners and piston rings? (November 14)
11853. List of anionic, cationic and non-ionic surfactants (November 13)
26380 Etch acid for Inconel 718 open Q. (November 13)
00671.Precipitation of metals from aqueous solution (November 10)
47392. Turbidity and excess fluoride in waste water open Q. (November 2)
22320. Plating cell for thickness distribution analysis (November 1)
34579. Gold, Silver, Copper, Aluminum -- which is the better electrical conductor? (October 30)
31751. Researching passivation level of copper anodes open Q. (October 28)
33641. Electrolyzing copper from chalcopyrite leaching (October 24)
34663. How to dissolve steel (October 24)
14838. Electroplating / Electrodeposition of Bismuth open Q. (October 23)
06539. Formulation of tin-zinc plating bath open Q. (October 21)
34810. Chromium III vs Chromium VI Plating processes (October 17)
28196. Ni-Co-P electrodeposition open Q. (October 11)
60516. Putting a voltage on a fishing lure by using dissimilar metals open Q. (September 28)
21986. Hot seal vs. cold seal for anodizing? open Q. (September 25)
04100. Electroplating with Copper Sulphate, Nitrate, or Chloride (September 17)
35479. I want to buy nickel brightener formula book (September 6)
10743. How can I manufacture phosphatizing, chromatizing & powder coating chemicals, and the other treatment and pretreatment chemicals? open Q. (August 23)
39386. How to electrodeposit copper nanoparticles open Q. (August 20)
14167. Electrode polarization (August 18)
20323. Brass Finishers in the 1800's open Q. (August 9)
59614. Electrodeposition of Beryllium - guidance please (August 8)
08007. What part does current density play in electroplating? (August 4)
60484. Anion membrane is brittle open Q. (July 27)
23519. Silver plating with silver nitrate (July 26)

    6c. K-12 SCIENCE PROJECTS, GRAMMAR & HIGH SCHOOL STUDENT QUESTIONS

48959. More science projects about rusting steel wool (December 12)
32807. Nails rusting science project (November 20)
38861. What are ways to measure rust? (November 6)
13443. References to help explain why citric acids clean pennies best (October 17)
11682. Percentage of copper in copper sulfate (October 16)
32807. Nails rusting science project (October 16)
21771. Why doesn't caustic make iron rust? (October 4)
07836. Citric Acid and Metal - What's the reaction? (October 3)
11675. Understanding and converting resistance, resistivity, conductance, & conductivity (August 18)

7. DRIFTED OFF METAL FINISHING, BUT INTERESTING TO SOME OF US :-)

23922. Musty smell in basement and throughout entire house (December 15)
07156. Boric acid as eye wash (December 6)
21024. Gloves for concrete work? (December 5)
60637. Algae despite Pool Ioniser open Q. (November 29)
11228. Toxic effect of boric acid (November 17)
44362. Swallowed Sodium Hypochlorite during root canal (November 6)
11303. Stains on granite counters (November 1)
11180. Increase the drying speed of Polyvinyl Alcohol open Q. (October 27)
38331. Running a natural gas line outside open Q. (October 24)
12373. Zinc oxide production by French process open Q. (October 20)
37106. Will calcium hypochlorite build less scale than bleach? open Q. (October 20)
19333. Easy way to empty toilet bowl of water (October 12)
34532. Solution for precipitating gold from HAuCl4 solution open Q. (October 12)
18029. Problems in White phenyl Manufacturing open Q. (October 10)
43983. Separating PGM's from raw ore...at home! open Q. (October 10)
23794. Concerns using muriatic acid to roughen concrete open Q. (October 7)
34676. Will iron interfere with scrap gold recovery? (October 3)
07278. Building Black-Powder Cannons open Q. (August 20)
00757. Servicing NCR Drawer so it shuts open Q. (August 15)
26176. Tanker Desk Restoration Tips open Q. (August 13)
14995. Excessive Iron in Swimming Pool Water (August 4)

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