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Current Topics:

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

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

03066. Best finish for aluminum autonomous submersible? open Q. (January 14)
41930. SS vs. Galvanized Bolts for Rooftop Solar Cell (January 10)
27167. Aluminum gas tank with stainless and brass attachments on saltwater boat (January 6)
16063. 4XX Stainless Screws vs. Zinc Plated for Windows and Doors? (January 3)
06082. Difference Between Chrome and Nickel Plating (December 29)
33550. Material of construction for concentrated H2SO4 (December 20)
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)
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)
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)


1. PREPARATION . . .

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

06053. Want shiny finish on stainless steel bolts/screws (January 8)
13730. Making a mirror surface in a Dia 2.5 mm hole in SUS316 (December 27)
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)
00376. Mechanical polishing vs. electropolishing of stainless steel camera (October 30)
41946. Pickling steel in phosphoric acid open Q. (October 20)

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

13405. Electropolishing Hastelloy open Q. (January 19)
50566. Titanium etch chemical ratios (January 18)
28680. Citric Acid vs. Nitric Acid Passivation (January 18)
13628. Passivating stainless steel causes loss of mirror polish (January 18)
47183. Can't get TRUE BLACK Manganese phosphate on S7 MIM Tool steel open Q. (January 11)
18495. Electropolishing of stainless steel: solution composition open Q. (January 8)
46618. Where to get citric acid for SST passivation? (January 4)
01264. De-scaling of Hot Rolled black Steel, Flats & Bars (December 29)
04561. Cleaning Molybdenum parts; Molybdenum and Hydrocarbons (December 29)
46041. Electropolishing 4xx stainless steel camera (December 26)
53012. Electrolytic Etching of Aluminum Plates open Q. (December 20)
09178. How To Remove Oxide Film on Titanium Alloy? open Q. (December 17)
09146. Electropolishing of Brass (December 12)
43921. Removal of mineral oil before electroplating (December 8)
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)
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)

    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)

04408. How to make alum from anodizing solution open Q. (January 20)
15825. After re-working the chem-film, the anodizing dye is bleeding (January 19)
60670. Corrosion of vehicle Aluminium accessories vip open Q. (January 19)
06885. Problems & Solutions in Passivation of Titanium open Q. (January 19)
41079. Titanium Deox/etch (January 19)
27719. Clear anodized aluminum appearance flaw -- looks galvanized open Q. (January 11)
22258. vip Brown stains on chromic acid anodising camera (January 6)
45157. Phosphate Fluoride Treatment of Titanium using Aluminum Racks open Q. (January 4)
22139. Satin Anodized Aluminum camera (January 3)
27504. What causes large crystals to form in the anodize tank? camera (January 3)
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)
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)
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)

    2b. ELECTROPLATING and ELECTROFORMING

35202. Want anodic anti-tarnish treatment for silver plating open Q. (January 20)
46795. Discoloration of black zinc plated parts camera open Q. (January 19)
20395. Rhodium plating Q&A, woes & problems (January 19)
22092. Black Rhodium vs, Black Ruthenium wear resistance (January 18)
29495. Help with Zinc plating questions (January 18)
53424. How Long Gold Plating over Brass Will Last? (January 18)
13098. What is "Plating Grade" Sodium Stannate? (January 17)
17838. Silver Plating on Aluminum: Blister / Bubble Problems open Q. (January 17)
34107. Whitewashed areas in alkaline zinc plating camera open Q. (January 17)
03634. Pinhole in silver plating on etched copper leadframe (January 17)
21285. Copper plating near middle of long rods is not thick enough (January 17)
35480. Zinc plating and rust (January 16)
30879. Plating thickness variation in hard chrome plating (January 15)
28851. White Spots on Zinc-Nickel Plating open Q. (January 13)
60664. Zinc plating is either too thin or it bubbles (January 12)
36161. Porosity causes tiny blisters in plating (January 12)
00706. Starting Nickel/Chrome plating. Is it worth it? open Q. (January 8)
01216. Hydrogen Embrittlement in Plating open Q. (January 4)
54953. Gold plating vs Silver plating for electrical contacts (January 3)
55155. Rinsing Silver Plated Parts open Q. (December 30)
05156. Plastic moldings have scratches despite chrome plated mold (December 29)
10037. Chrome plating is too soft (December 28)
44771. Reducing Sulfate level in a Copper Bath (December 28)
51694. Huge and hair-like crystals when plating at high current (December 26)
25523. Current density for hard chrome plating open Q. (December 23)
30419. Rhodium plating solution manufacturing (December 23)
40124. Using activated carbon in Rh plating solution open Q. (December 19)
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)
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)
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)
60520. Cu & Sn Anode balls Utilization Improvementopen 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)

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

25680. Nickel boron nitride, other mold release coatings open Q. (December 26)
56574. Conductive epoxy for plating metallization? (December 26)
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)
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)

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

28527. Base coats and top coats for vacuum metallizing open Q. (January 12)
12049. Power Supply for Sputter Cleaning? (January 12)
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)

    2e. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

46161. Removing white spots / storage stain on galvanized metal open Q. (January 19)
50428. How to make Galvanizing Flux? (January 15)
40753. How to design kettle, heating, pretreatment, degreasing, and rinsing? (December 27)
60652. Dross sticks to work, but no dross in galvanizing kettle (December 27)
25997. Prevention and removal of white rust on galvanizing (December 26)
43365. Galvanizing flux ACN rising; high ZnCl2 Consumption (December 24)
39907. Want mixing ratios for all the steps in hot dip galvanizing open Q. (December 20)
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)

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

54149. How Can I Reduce and Remove Zinc Dross open Q. (January 6)
01754. Blackening stainless steel: black oxide chemical dipping open Q. (January 4)
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)


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

10012. Field applied Galvanized Zinc Coatings? Cold galvanizing compound spray (December 29)
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)


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)

    3b. POWDER COATING

47137. Powder coated diecast parts fail drop test open Q. (January 20) brQ.
01152. Removing oil marks from powder coating open Q. (January 13)
45155. Okay to powder coat onto polished stainless steel? (January 9)
58050. Powder coating finishes: textured, structured, plain (January 6)
60651. Powder Equipment Not Applying Static Charge? (December 19)
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)

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

29961. Clear coating over bronze (December 26)
49008. Information about cataphoresis open Q. (December 7)
23047. How to reduce paint thickness in Cathodic Electro Deposition (CED) system? (November 27)

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

24567. Paint peel off problems on hot & cold rolled steel open Q. (January 8)
35373. Flexible spray chrome open Q. (January 6)
40989. Stoving Enamel (January 4)
00161. Clear coating copper bathroom accessories (December 29)
18779. Teflon Coating of Large Drum open Q. (December 29)
60552. Clearcoated bronze plate gets black spots (December 26)
34052. Manganese Phosphating issues and answers (December 26)
32947. Clear polyurethane for signs open Q. (December 20)
46505. Sublimation Coating Q&A (December 11)
51995. Can't get stains off fluorocarbon paint open Q. (November 28)
30522. Clear coating to seal a rust patina finish on metal (November 6)
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)


4. POST-TREATMENTS

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

45598. Yellow chromate rubs off (January 16)
04170. Tarnish resistant passivation of brass and copper open Q. (January 14)
28003. Protecting silver plated bus bar from tarnish (January 10)
40798. Sodium Dichromate sealing of anodized surfaces open Q. (December 19)
17722. Simple test for presence of clear chromate (November 27)
15889. Copper oxidation inhibitor (October 11)

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

15043. Annealing of copper discolors it camera open Q. (January 17)
46264. Discoloration of Rene 125 Superalloy -- Vacuum Furnace Discoloration? open Q. (October 25)
30700. Acetone doesn't remove lacquer on silver (October 4)

    4c. STRIPPING, REWORKS, ETC.

57539. Stripping copper from steel takes too long and causes etching (January 10)
00792. Stripping of Nickel Plating from Neodymium magnets open Q. (January 7)
39257. How to strip cubic boron nitride (December 19)
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)


5. SUPPORTING ISSUES

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

37665. Silver plating: analysis of silver open Q. (January 7)
12872. How to analyze Zinc Phosphate solution for iron and zinc open Q. (January 5)
01029. Recovering contaminated palladium chloride catalyzing bath open Q. (January 4)
41766. Can fluoboric acid be saturated with lead although it analyzes at 11% ? (December 21)
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)

     5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

26974. TDS of rinsewater rises when we do acid pickling (January 13)
33695. Removal of Ammonia from Wastewater (January 13)
01558. Re-using pickling waste or recovering iron from it (January 4)
33620. Problems in Steam Generator water systems open Q. (December 29)
07245. Reducing COD in waste water open Q. (December 29)
41896. Reducing NaCl in effluent open Q. (December 19)
07022. How to recover silver stripped off copper (December 18)
02576. pH measurement in D.I. vs. distilled water (December 15)
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)
30932. Regenerating resin with high concentration NaOH and HCl open Q. (October 5)

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

10986. Swallowing Muriatic Acid (January 19)
04988. Alternate Coating for Iron Cookware. Kalhai involves poisonous gasses! (January 17)
32468. Allergic reaction to white gold (January 15)
48245. How toxic is chrome plating (January 12)
07164. Is galvanised steel poisonous? (January 9)
07290. Is a galvanized clothes dryer drum a health hazard? (January 3)
22551. Is there danger in cast aluminum cookware? open Q. (December 29)
40647. Did constant bleach & dog urine exposure cause my heart attack? (December 26)
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)
19953. What's the toxic effects of mixing muriatic acid and chlorine (November 24)
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)
16446. Seeking plans on how to build an automotive spray booth open Q. (October 6)
14264. Safety of galvanized park BBQ grills (October 2)

    5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

39112. Something is weakening our polypropylene filter cloth open Q. (January 5)
25094. Need to start a Zinc Plating Plant open Q. (December 20)
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)

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

44376. Boeing Finish Code Q&As open Q. (January 15)
57140. Is there a Standards-based method for analyzing nitric-dichromate passivation solution? open Q. (January 10)
13252. Chrome plating adhesion standards and tests open Q. (December 27)
60555. Problem with Certifications Which Aren't Specific (December 26)
42063. Can we apply MIL-P-23377 Primer ourselves? open Q. (October 25)
19726. What licenses are required for hard chrome plating in India? open Q. (October 2)


    5f. WORLD WIDE WORD OF THE WEEK

14356. 316 SST vs. 316L SST (January 18)
22164. Difference between "EG" steel and "GI" steel (December 20)
35197. Questions about zinc electroplating specification Fe/Zn8 open Q. (December 20)
31203. Is black iron steel the same as high-carbon steel? (November 20)
55518 "Low temperature black chrome" coating open Q. (October 31)
33854. Corrolube GFS2 finish? open Q. (October 15)
00097. What is "electroforming"? (October 4)

    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)

    5h. MOSTLY METALLURGY

13204. Annealing Stainless Steel types 303, 304, 316, 202 open Q. (January 16)
60665. Is Chrome Steel tubing Resistant to 350 °C Hydrogen? open Q. (January 13)
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)


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

11721. Source for Nickel free watch? open Q. (January 19)
33774. Gold plating onto silver surfaces (January 19)
60668. How to tell if surface was chrome plated or anodized camera (January 19)
16430. How to paint brass lamps open Q. (January 19)
28105. Copper plating a brazed joint camera (January 17)
01298. Nickel Plating Solution Recipe Needed open Q. (January 14)
10917. How to polish aluminum open Q. (January 14)
17478. How to rust steel decoratively open Q. (January 13)
32894. Melt old gold to make new jewelry open Q. (January 12)
56593. Rust tunnels under paint (January 9)
60663. Layers of plating not fusing (January 9)
03338. How do I stop copper from oxidizing? (January 8)
11428. Refinishing a Wood Stove open Q. (January 8)
03003. Dissolving gold deposits for analysis open Q. (January 7)
22867. Why would yellow gold turn silver? (January 7)
12362. Coating tables and bar tops with thick clear pourable plastic camera (January 7)
36290. Will nickel plated stainless exhaust system peel? open Q. (January 7)
19652. Electroforming with non-cyanide Silver (January 6)
48843. 18Kt Gold Bracelets Aren't the Same Color camera (January 5)
11172. Preparing acid copper brightener camera (January 4)
00085. Problems and solutions for copper electroforming open Q. (January 4)
16699. Geneva Metal Kitchen Cabinets: Painting, Removing Dents, Replacement Handles open Q. (January 3)
24004. Nickel vs. Chrome for kitchen & bathroom faucets (January 2)
40943. Black zinc plating vs. Black oxiding. What's the difference? (January 2)
32469. Melonite vs Tenifer process / Salt-bath nitriding open Q. (January 2)
07627. Chromate conversion coatings and other passivation treatments for Copper open Q. (December 29)
08007. What voltage is required for tabletop electroplating console (December 29)
08229. Cast Iron Tub Smells and Stains for No Traceable Reason open Q. (December 2)
12467. What is Mild Steel? (December 29)
11385. Cheap D-I-Y repair of scratches on brass bed (December 28)
27794. Want bright bronze patina on zinc (December 28)
33203. How to remove acrylic air dry paint from vinyl doll? (December 27)
34318. What to thicken peroxide with to make a paste or gel? open Q. (December 27)
12938. Sublimation coating of granite tombstones / grave markers open Q. (December 27)
13132. How to plate a ring in two-tones (December 27)
60654. Want to plate the inside of fire protection piping in situ to replace lost wall thickness (December 26)
17606. Silver or rhodium plating ring to prevent allergy open Q. (December 26)
18751. Turning yellow gold jewelry into white gold look? open Q. (December 26)
38904. How To Intentionally Rust Metals Such As Jingle Bells & Safety Pins (December 26)
16257. Painting galvanized pipe open Q. (December 25)
49892. Galvanic Reaction between Tin plated connectors and Aluminum wire (December 25)
32971. Color Anodizing in Home Shop camera open Q. (December 22)
26845. How to paint a stove top open Q. (December 22)
28059. Remove rust stains from vinyl siding camera (December 21)
53765. Plumbers putty ruined finish on copper sink camera open Q. (December 21)
33173. Paint to prevent Aluminum boat, electrolysis/corrosion open Q. (December 20)
34307. Need cheap way to de-ionize water at home open Q. (December 20)
42881. Is zinc cabinet hardware rust-proof? (December 18)
02850. Protection for outdoor steel sculpture camera (December 17)
16306. Aluminum as an 'art' painting surface (December 18)
59206. Want lustre finish on aluminum clear anodized in bisulfate camera open Q. (December 17)
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)
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)
34314. How does aluminum foil clean silver open Q. (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)
02869. Home based electroplating business (December 3)
60643. Surface coat cast iron wheel to protect timber floor (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)
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)
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)
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)
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)
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)
17345. Q&A's on Rhodium plating of silver rings (October 7)
19833. Why is it harmful to let iron phosphate dry before oiling? open Q. (October 3)

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

60669. Removal of oxide layer from nickel metal foam camera open Q. (January 19)
25645. Rotary Swaging, Rolling or Forming Anodized Al-alloy tube-end camera open Q. (January 19)
34579. Gold, Silver, Copper, Aluminum -- which is the better electrical conductor? open Q. (January 12)
52627. Aluminium from dissolving mandrel plates out on electroform open Q. (January 9)
02236. Preparation/Extraction of Potassium Cyanide (December 29)
02589. Need to make electroless nickel solution to plate stainless & nylon sponges camera (December 9)
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)
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)
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)

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

57496. Why can't we store electricity in water? (January 18)
39965. Want 2:1 ratio of acids, but 1 Normality open Q. (January 18)
31790. What is chemical reaction when you put copper into silver nitrate? open Q. (January 16)
43606. Science project: Do coins rust faster in salt water or fresh water (December 28)
38861. What are ways to measure rust? (December 27)
48959. More science projects about rusting steel wool (December 12)
32807. Nails rusting science project (November 20)
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)

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

09128. Copper Sulphate as Swimming Pool Algae Remedy? (January 20)
26801. Solving an electrolysis problem in home plumbing open Q. (January 19)
34676. KEEP IT SIMPLE. What two or three chemicals melt gold flakes and dust? (January 4)
19333. Removing Metal Scratches from Toilet Bowl (December 29)
07156. Boric acid as eye wash (December 29)
09716. How to remove blue tint from aluminum chloride? open Q. (December 28)
53795. Chemicals that mix with water for an extreme heat reaction (December 28)
60637. Algae despite Pool Ioniser (December 26)
20443. Will sterling silver chain turn my skin green? open Q. (December 21)
21527. Body chemistry and sterling silver open Q. (December 21)
23137. PVC glue breakdown (December 20)
18029. Problems in White phenyl Manufacturing open Q. (December 16)
23922. Musty smell in basement and throughout entire house (December 15)
21024. Gloves for concrete work? (December 5)
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)
34532. Solution for precipitating gold from HAuCl4 solution open Q. (October 12)
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)

legend:

(    )= Date in parentheses is most recent posting on the thread
open Q.= Thread currently ends with a question or the editor-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

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