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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 . . .

03354. Stainless steel corrosion by chloride ions? open Q. (October 18)
07897. Galvanic compatibility of aluminum and copper (October 12)
58242. GI (galvanized) sheet vs. CRCA for rust prevention and corrosion protection (October 12)
60526. Need black plating resistant to KOH open Q. (October 11)
60525. Polyester powder paint finish vs zinc phosphate finish (October 10)
13807. High friction coating for aluminum or SS rod open Q. (October 7)
03066. Aluminum Anodizing vs. Powder Coating open Q. (October 7)
16063. Ideal finish for screws holding circuit boards open Q. (October 2)
46184. Non-magnetic Material for Bearing Slot open Q. (September 18)
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)
53205. E-coating vs. Zinc plating -- which is the better long term option? (August 13)
51980. Finishes for Bolts on Galvanized Structural Steel open Q. (August 4)
60482. Galvanic corrosion: nickel plated lightning rod on zinc coated roof? video (July 19)
00866. Need Low-friction Hard Material open Q. (July 8)
31153. Can I use Stainless steel washer for A193 GrB7 bolts? (July 7)


1. PREPARATION . . .

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

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)
16835. Best finishing process on 316 stainless steel sinks for balance of scratch resistance & fingerprint resistance? (August 31)
14020. Centrifugal Barrel Finishing (July 14)
54590. Silver coins are sticky after vibratory polishing in shampoo (June 14)
05629. Best way to polish tiny pieces of 304 stainless steel wire? (June 13)

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

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)
12926. Electropolishing with citric acid camera (August 16)
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)
47682. Electropolishing of Cobalt Chromium Stents open Q. (July 21)
34052. How to sort our zinc phosphated parts from manganese phosphated ones (July 20)
51028. Magnesium Phosphating Crystals Are Too Big (July 10)
41404. Parts rusting after zinc phosphating open Q. (July 10)
35679. On-site passivation of pipe (July 7)
41896. Pickling cast iron with sulfuric acid open Q. (July 4)

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

16048. What to plug tubing with for plating (February 19)


2. INORGANIC FINISHING PROCESSES . . .

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

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)
03362. Paint adhesion failures over Mil-C-5541 chromate conversion coating open Q. (September 12)
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)
42754. Anodizing to a matte black finish (July 24)
60473. Finishing/cleaning type 5083 Aluminium for UHV open Q. (July 14)
38164. Surface grinding a nickel acetate sealed surface (July 6)

    2b. ELECTROPLATING and ELECTROFORMING

02406. Problems in ammonia chloride zinc plating: Q&A's (October 17)
60515. Bad finish around hang/hole in Nickel-Chrome plating camera (October 15)
12634. What to substitute for unavailable Nickel S-Rounds? (October 15)
11800. Acid Copper Plating: misc. issues and problems camera open Q. (October 14)
60528. Arcing burning in cadmium plating camera open Q. (October 12)
22092. Black Rhodium vs Black Ruthenium wear resistance open Q. (October 12)
33576. Black chrome adhesion problem open Q. (October 11)
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)
25024. Electrodeposition of Titanium open Q. (October 5)
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)
04207. Bright Nickel Plating - Burnt on HCD area open Q. (September 17)
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)
47037. Chromate conversion on cadmium not adhering (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)
11955. Hard chrome plated rotogravure cylinder surface is oxidized and white rust observed (July 25)
25279. Alternative to gold plating for conductivity (July 21)
50375. What is proper Rhodium Plating Thickness (July 20)
55075. Hard chrome plating chipped off open Q. (July 20)
24506. Copper plating of grounding/earthing rods (July 18)
05358. Large 'nodules' on gold rinse filter camera (July 16)
04153. Chrome Plating Small Tubing I.D. (July 15)
59451. Chrome plating rectifier problems open Q. (July 14)
60379. Chloride stain mark on chrome surface (July 14)
40095. Zinc plated wire turns yellow in rainy season (July 14)
13252. Chrome plating adhesion standards open Q. (July 11)
28851. Some problems with Process of Zinc-Nickel Plating (July 5)
09676. Problems with tin plating over brass open Q. (July 5)

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

48996. Stripping Hardcoat or Anodized Coating on Aluminium open Q. (October 13)
24339. Why did electroless nickel turn green when heat treated? (October 11)
45977. EN Staining Issues (October 10)
11290. Difference between Nickel plating and Electroless Nickel plating open Q. (September 16)
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)
30406. Pitting Problem on Copper Plated ABS (July 10)
21840. Oxidation of immersion silver coating on PCB (July 10)
57929. Formula for electroless nickel plating solution (July 8)

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

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)
28527. Base coats and top coats for vacuum metallizing (July 7)
12547. Bias sputtering (June 21)

    2e. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

57860. How to avoid Fish-boning on galvanized surface camera open Q. (October 18)
01797. Hot dip tinning to fix poor adhesion of zinc? open Q. (October 17)
56867. Galvanizing discoloration camera (October 16)
40753A.Starting-up a Galvanizing Kettle: stacking Zinc Ingots open Q. (October 14)
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)
25997. Prevention and removal of white rust on galvanizing (September 20)
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)
15377. Need to build or buy a Hot-Dip Galvanizing Kettle open Q. (July 5)
60382. What is the deposition rate of flux on steel in galvanizing? (June 28) vip
38915. Peeling problem in galvanizing of steel camera (June 27)

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

13935. Hot Black oxide is rubbing off open Q. (October 12)
11740. Black oxide formula for Hot Blueing of Guns/Firearms (September 12)
47534. Galvanising is bridging a gap (July 24)
01150. Alternative to glycerol for removing iron from black oxide bath open Q. (June 21)
40943. Black oxide thickness & salt spray requirements for muddy & dusty application? open Q. (June 14)


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

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)
24405. Hot-dip Galvanizing vs. Zinc-rich Dip-spin Coatings camera (September 1)
41952. Poor Dacromet Adhesion open Q. (August 20)
13026. How Graphite Coating is Done, and What Are the Properties of the Coating (June 24)
20713. Dip-spin zinc-rich coatings on nylon insert nuts open Q. (June 20)


3. ORGANIC FINISHING PROCESSES . . .

    3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS

34780. Repair E-Coating Scratches? (October 16)
49008. Information about cataphoresis (October 11)
51966. DI Water solution and Quality in E-Coating (October 10)
32574. Anode Cell Area Calculation open Q. (October 7)
23160. Is it ionic contamination or bacteria? (September 28)
45328. Low pH Problem in CED / E-coating Bath (July 25)
32574. Roughness in CED coating (June 15)
46042. Recovering paint from Autophoretic rinse with Ultrafiltration open Q. (June 3)
26147. Autophoretic coating adhesion issues open Q. (June 1)

    3b. POWDER COATING

46160. New powder coating over old camera open Q. (October 19)
47025. Is "pre heating" essential for powdercoating? open Q. (October 18)
01926. Can Powder Coat Be Used for Electric Insulation? open Q. (October 16)
22164. Does zinc plating require pretreatment before powder coating? (October 14)
21382. Powder Coating Defects: "Orange Peel" (September 19)
39523. Powder Coat Failure on Aluminum Railings camera open Q. (August 16)
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)
50258. Baking powder coating in my kitchen oven (July 21)
01369. Epoxy powder coating of stainless steel open Q. (July 21)
59750. Expiry date of powder used in powder coating? (July 18)

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

45245. E-coating for silver jewelry open Q. (February 27)
60395. Why did our brass parts turn reddish brown? (February 22)

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

23536. Spray finish of silver nitrate, "Chrome look" paint" video open Q. (October 10)
48633. Need black wrinkle paint, sprayable by airbrush (October 7)
34052. Lacquer for Manganese Phosphating open Q. (October 5)
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)
30522. Clear coating to seal a rust patina finish on metal open Q. (August 21)
15909. Mixing Formula for Plastisol open Q. (August 12)


4. POST-TREATMENTS

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

15889. Copper oxidation inhibitor (October 11)
37592. Nitric Acid Bright-Dip for Sterling Silver open Q. (September 20)
  5204. How to control Dry Lube finish thickness? (June 1)

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

30700. Acetone doesn't remove lacquer on silver (October 4)
47242. Hydrogen embrittlement relief for parts having areas of different hardness? (August 16)
11803. Solder testing failure camera open Q. (July 7)
09998. Hydrogen embrittlement failures in cadmium plating open Q. (June 21)
01216. Silver Plating fails notchbar tests despite hydrogen embrittlement relief before & after plating (May 15)

    4c. STRIPPING, REWORKS, ETC.

08881. Stripping both powder coating and underlying chrome plating from auto rims (October 17)
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)
48674. Removing/stripping black oxide finish open Q. (July 20)
60470. Can't strip 1923 Hubcaps with magnetic metallic coating open Q. (July 7)
29778. Stripping trivalent chrome with TKPP open Q. (June 22)


5. SUPPORTING ISSUES

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

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)
13432. Titanium Etch pre FPI open Q. (August 20)
50132. Q&As on Operation of ASTM B117 Salt Fog Test Chambers (August 12)
60471. Calculating plating speed with Hull Cell (alkaline zinc plating) (July 10)
60462. Determine % Iron in Nitric & Ammonium Bifluoride Pickling Bath for Stainless Steel open Q. (June 19)
35573. Black spots observed in Salt Spray test open Q. (June 4)

     5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

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)
02576. pH measurement in D.I. vs. distilled water (July 25)
14924. Hot Tank Evaporation Rates open Q. (July 11)
01410. Organics and Complexes in Electroplating Wastewater open Q. (July 5)

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

22597. Water Ionizers. Is it safe to drink alkaline water? open Q. (October 16)
35556. Safety of nickel or chrome plated grilling surfaces open Q. (October 7)
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)
20858. Can we use nickel under gold plating on flatware? (August 31)
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)
21703. Is galvanized desk organizer safe? (June 21)
29590. Testing food for Nickel open Q. (June 19)
34002. Dangers/Toxicity of inhaling muriatic acid fumes (June 1)

    5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

60530. Can gold be recovered practically after plating shop fire? (October 17)
03254. To use plastic HCl tanks or not (October 17)
06364. Suggested Way to Bring Power to Titanium Plating Basket (October 16)
13877. Fire Protection for Powder Coating Booths, NFPA Issues open Q. (October 12)
60513. Amperage measurements for copper plating bath do not make sense (September 28)
58345. Setting up our electropolishing system open Q. (September 25)
17485. Tank Water Evaporation Estimates (September 24)
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)
52466. How to reduce steam conductivity? open Q. (July 18)
05142. Materials of construction for zinc phosphating tank and accessories (June 19)
36682. Rectifier for Ammonium Chloride Acid Zinc Plating - Air or Water/Oil Cooled? open Q. (June 14)
00181. Temporary Class 5 (100) Cleanroom Paint Peel Repair open Q. (June 6)

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

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)
50746. Stainless passivation with nitric acid (July 10)
57140. Confusing Nitric Acid "%" Spec (June 13)


    5f. WORLD WIDE WORD OF THE WEEK

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)
30536. Correct abbreviation for Stainless Steel (July 8)
26629. Difference between MFZn2C and PFZn8C open Q. (June 20)
58218. Bichromate vs passivation (June 19)

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

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)
39839. Surface Chromium Increase for MIl-DTL-5541 Expected? open Q. (May 22)
35470. What's the big deal with RoHS and REACH Compliance? (May 15)

    5h. MOSTLY METALLURGY

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)
48866. Hardening Type 410 stainless steel to 85 HRC open Q. (October 3)
60519. How to anneal silver plated copper & nickel open Q. (October 3)
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)
01207. Is En8 grade suitable for Carburizing? open Q. (July 18)
60480. Aluminum spring material open Q. (July 18)
51470. How to achieve hardness up to 45-50 HRC on C45? open Q. (June 20)
60456. Stress Relieving a Brazed Stainless & OFHC Copper Part open Q. (June 15)


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

33616. Gold Recovery for Dummies open Q. (October 19)
56574. Using liquid palladium to make part conductive open Q. (October 19)
08229. Stained bathtub (October 19)
29370. Identifying rings: Marking system for rings camera open Q. (October 18)
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)
00085. Copper electroforming pinholes, grooves and flaws open Q. (October 17)
10275. How to remove white water rings from wood furniture (October 16)
19039. Cast Iron Cook Stoves: Where to find parts and how to restore open Q. (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)
14342. Stiffel lamp restoration open Q. (October 9)
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)
04913. Do It Yourself Nickel Plating onto Steel camera open Q. (September 26)
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)
16945. 101 Q&A's about Corten weathering steel camera (September 19) open Q.
60510. What kind of coating for washing machine's aluminum spider arm? camera open Q. (September 19)
13035. Bright zinc history question open Q. (September 17)
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)
24359. Barber Chair Restoration Q&A's and Successes camera open Q. (September 1)
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)
01198. How to Darken Bronze open Q. (August 28)
16430. Refinishing outdoor brass coach lights (August 24)
21483. Cleaning, Polishing & Refinishing Bronze Cymbals open Q. (August 23)
46505. Sublimation Coatings on Wood (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)
26415. Hobby nickel plating and chrome-look paint (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)
56727. Gold Plating Iphones and mobile phones (August 1)
41124. Q&A's Replating of Silver Rings open Q. (July 31)
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)
07423. Refinishing an old wood stove camera open Q. (July 21)
38227. Cleaning milky stain from Aluminum wheels open Q. (July 21)
39311. How to Do Brushed Nickel Plating (July 20)
60483. Brushed raw aluminum chairs needing cleaning and protection (July 20)
00779. Removing tarnish on bronze open Q. (July 20)
53424. Replating Old Gold Plated Coach Decoration camera open Q. (July 18)
34112. Steel patio furniture corrosion resistance? (July 11)
11385. Brass bed refinishing and cleaning (July 11)
33611. Muriatic Acid for Fuel tank cleaning? (July 10)
07074. Power Supply for Home Anodizing (July 10)
08502. Can I have my ring rhodium plated? open Q. (July 9)
27814. How to Recover Platinum from Catalytic Converters open Q. (July 7)
34618. Putting silver in the dishwasher (July 7)
16885. What caused a dime to turn copper colored? camera open Q. (July 5)
34627. Cleaning Galvanized Metal and Keeping It Shiny open Q. (July 5)
02606. Rust finish for galvanized tin? (July 4)
07290. Lining bottom of BBQ with galvanized sheet (July 3)

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

34810. Chromium III vs Chromium VI Plating processes (October 17)
28196. Ni-Co-P electrodeposition open Q. (October 11)
59181. Electrodeposition for creating objects (October 11)
51995. Fluorocarbon coatings and wear? open Q. (October 10)
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)
53795. Chemical for heat production in Geo-polymer concrete open Q. (August 13)
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)
07136. Lattice constant of stainless steel? open Q. (July 20)
00098. Electroplating with niobium. Electrodeposition of niobium open Q. (July 18)
53509. Conductivity coatings for heat sinks open Q. (July 15)
60461. Rusting rates of Steel vs. Zinc (July 7)

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

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)
48959. How does pH affect rust (September 26)
33641. What is the affect of using different voltages in the electroplating process? (September 19)
11675. Understanding and converting resistance, resistivity, conductance, & conductivity (August 18)
19816. What are some things that are electroplated? (July 7)

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

22762. Uses for "bluestone" copper sulphate (October 17)
12373. Zinc oxide production by French process open Q. (October 16)
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 muric acid to roughen concrete open Q. (October 7)
38331. Running a natural gas line outside from basement to second floor? open Q. (October 7)
34676. Will iron interfere with scrap gold recovery? (October 3)
07278. Building Black-Powder Cannons open Q. (August 20)
07156. Boric acid as eye wash (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)
29544. Drain lines back up (July 30)
23922. Musty smell in basement and throughout entire house open Q. (July 27)
60481. Cleaning oil from silicone kitchen equipment (July 18)
20150. Fineness of gold is lower after smelting (July 7)

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