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Categories --
    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 . . .

42140. Stainless or zinc plated a better galvanic couple with aluminum? open Q. (March 28)
40228. Electroplating of iPhone cover glass open Q. (March 28)
50259. Galvanic Action between Stainless Steel and Phosphated Steel (March 28)
  7984. What metals can resist hydrochloric acid? (March 26)
  7605. Black Oxide vs. Phosphate for Automotive Chisels & Punches (March 24)
  9924. Hot Dip Galvanize vs. Zinc Plating (March 19)
51572. Dull metal for a shampoo backbar (March 18)
60406. Finishing of Iron Pipe for Furniture camera (March 18)
27848. Powder coating galvanized lawn edging (March 7)
14785. Stainless investment castings are "rusting" (February 28)
  1686. Corrosion resistance of Hard Chrome vs. HVOF? (February 24)
  6009. How to get black finish on stainless steel (February 23)
16305. Washer Periphery on Stainless Steel Wedge Anchors rusting way too fast (February 21)
38265. Why must Copper Bus Bar be Tin Plated? open Q. (February 21)
60390. Food safe cast aluminum coating open Q. (February 20)
  3354. Stainless steel corrosion by chloride ions? (February 18)
  3284. Mold coating to prevent Polyethersulfone adhesion (February 18)
60383. Is there a comprehensive finish/substrate table focused on corrosion resistance? (February 18)
41804. 304SS vs 316SS for demister open Q. (February 4)
29294. Making whistle pressure cookers out of mild steel open Q. (January 30)
60378. What's the best finishing process for exterior steel railing? (January 30)
60375. Sublimation Printing onto an Electroplated Surface open Q. (January 26)
58242. If zinc is more reactive than steel, why does it corrode slower? (January 14)
60283. Cosmetic finish for a brazed Brass/Aluminum part (January 7)
38265. Why must Copper Bus Bar be Tin Plated? open Q. (January 2)
57147. Making a galvanized bolt non-conductive (January 2)
32579. Black zinc chromate plated on stainless steel (January 2)
19266. Corrosion of Zinc blue passivated screws assembled to sulphuric anodised Aluminium Component (January 2)
28801. Need options to color steel red (January 2)
27089. Tungsten plating isn't as hard as it should be open Q. (January 1)
47205. 430 stainless steel use in bath shower area (December 20)
40621. What process can create a scratch proof stainless steel surface? (December 5)
27167. Coating stainless steel with inorganic zinc silicate (November 16)
59450. Stainless steel finishes for 1000-hour salt spray (November 15)
60225. HD Galvanized steel vs Aluminum 5052 H32, Resistance to salt Spray Test (November 15)
24160. Tarnishing of Stainless Enclosures camera (November 2)
14325. Silver's Corrosion Protection Properties (October 21)


1. PREPARATION . . .

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

29425. Shot blasting abrasive particles open Q. (March 19)
60381. All in one buffing component (March 9)
12526. If the blast profile is higher than required, what is the remedy? open Q. (January 2)
15011. Does blasting only clean, or does it increase surface area? (December 19)
14468. How does the grease content of Polishing Compound effect finishing? open Q. (December 7)
  5629. Vibratory finishing of Stainless Steel to a mirror finish (December 2)
33098. Cleaning and Polishing Brass Cartridge Cases for Reloading Ammunition open Q. (November 23)
12581. Burnished areas on polished airplane wing camera open Q. (November 16)
  6434. How to do Satin Finish on Stainless Steel open Q. (November 1)
  6927. Copper polishing for optical use open Q. (October 26)

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

20617. 410SS passivated screws get red rust (March 25)
40139. How to prevent rusting after acid pickling (March 25)
10795. Localised Electropolishing of SS (March 24)
53648. On-site 'out of the tank' Electropolishing process (March 17)
16827. Improving the Composition of our Zinc phosphating process (March 17)
7046. What is inhibited HCl? Which inhibitor to use? (March 8)
17826. How to increase zinc phosphate coating weight camera open Q. (February 27)
18495. Q&A about electropolishing of stainless steel open Q. (February 26)
12028. Is degreasing necessary before pickling? (February 25)
16849. Controlling Dissolved Titanium in Etch Solution open Q. (February 21)
14291. Staining during pickling and passivation of 304L (February 21)
2986. Inconsistent bright dipping of brass open Q. (February 20)
51964. How to use zinc phosphate sludge for the manufacture of bricks? open Q. (February 20)
15010. Chemical removal of heat treating scale and oxides -- steel parts (February 20)
37939. Electropolishing of 202 and 304 grade stainless steel (February 18)
  7862. Best way to remove all trace oils from stainless steel tubing? (January 16)
45662. Can we skip cleaning and de-rusting before phosphatizing if the parts are blasted? open Q. (January 8)
14221. Surface Activation for Phosphating. Grain Size Issues open Q. (January 8)
52624. Zinc phosphating for rubber to metal bonding (January 7)
  4160. Remedial action if ss material blasted with steel shot (January 2)
41404. Rust on zinc phosphated parts camera (January 2)
46618. Using Hydrogen Peroxide for Passivation of Stainless Steel open Q. (December 23)
10704. Why is the optimum temperature for degreasing agents between 80-85 °C? (December 22)
47682. Electropolishing and Chemical Etching Processes for Cobalt Chromium (December 14)
14083. Electropolishing interior of a 1000 gal SS tank (December 7)
43530. Passivation, but not per AMS2700E suggested type (December 2)
58533. Wasteless one step phosphating open Q. (November 15)
37409. Zinc phosphate sludge formation rate? (October 31)
28681. 17-4PH Passivation Problems (October 26)
54869. Passivating Cobalt Chrome implants ... nitric vs. citric acid camera (October 26)
52693. Passivated parts Per ASTM A967 show signs of rust open Q. (October 13)

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

16048. What to plug tubing with for plating (February 19)
13023. Powder Coating in Lieu of Plastisol for Anodizing Racks open Q. (September 20)


2. INORGANIC FINISHING PROCESSES . . .

    2a. ANODIZING AND LIGHT METAL TREATMENTS

60418. Zinc plating "Rocket Music Wire" open Q. (March 28)
60415. Time Saver, then Direct to Silk Screen? Or must we etch/chromate? open Q. (March 25)
18655. Bead blasting aluminum before anodizing. Cosmetic anodizing. (March 24)
43432. White spot 24 hours after anodizing adc12 aluminum open Q. (March 17)
  5253. Chromate, Alodine, Iridite, Chem-Film? What's the Process & Sequence of Operation (March 7)
32830. Crazing problem in anodizing camera (March 7)
54441. Chromic Acid Anodising REACH push back (February 27)
60398. Pretreatment required before Alodine (Chem-Film on Aluminum) open Q. (February 24)
60391. Is Black on Bright Dip Anodizing Embedded Iron camera open Q. (February 20)
58771. White powder in alodine body open Q. (February 20)
26189. Aluminum embedded in concrete open Q. (February 19)
15825. Uneven color in black anodizing (February 19)
  6559. Alodine is not properly coating 5052 aluminum alloys (February 19)
    497. Black hardcoat anodize aluminum open Q. (February 18)
  3678. Anodised Aluminum Journal Bearing (February 7)
  8041. Gold plating of aluminum (February 3)
60374. Plating on Aluminium without zincate or stannate (January 29) vip
28128. Correcting an air lock in sulphuric acid anodizing open Q. (January 28)
60372. Will Anodizing Come Out Different if Aging is Different? open Q. (January 22)
55301. Hard Anodizing Aluminium LM24 for aesthetics camera open Q.
34822. Alodine 1200S lowest service temperature (January 4)
36240. Can't color anodize type 7075 T651 Aluminum (December 13)
22258. Arcing around plugged holes during chromic acid anodize camera (December 13)
  6733. Can 2-year-old chemical polishing bath for aluminum be used? open Q. (December 8)
42711. Is it possible to hard anodize 2219 with a coating thickness of .001"? open Q. (November 30)
60331. Extending corrosion durability beyond 'normal' hard coat anodizing? open Q. (November 25)
60325. Clear type II anodize over masked black type III anodize (November 22)
60242. How to do matte anodize and mirror surface on one sheet (like iPhone 5) open Q. (November 15)
60312. Will press fit into plastic rub anodizing off? (November 13)
60309. Polished Aluminum vs Undercoated Aluminum (November 5)
17285. Type 3003-H14 Perforated Anodized Aluminum open Q. (November 1)
  1819. Q&As on Teflon (PTFE) impregnated Hard Anodizing of Aluminum open Q. (November 1)
32137. Burning problem in Hard Anodizing of Aluminum camera open Q. (October 26)
60302. Runs streaks in type III black dye camera (October 26)
42251. Chromate Conversion vs Anodizing (October 18)
45267. Hard Anodizing - Recommended Thickness (October 18)
60295. Anodizing on Threads open Q. (October 17)
  3357. Hard wear resistant Coating for Aluminium (October 17)
  6237. Tacky 2024 Anodized Parts (October 12)
26660. Anodizing Automotive Brightwork Q&A's camera open Q. (October 7)
17772. Polishing anodized aluminum open Q. (October 7)
  3428. Bending anodized aluminum pipe open Q. (October 5)
28623. Want black anodizing on one side and bright plating on other side of aluminum heatsink open Q. (October 5)

    2b. ELECTROPLATING and ELECTROFORMING

60352. Acid vs Cyanide gold plating solutions camera open Q. (March 28)
23686. Gold Bath Amp-Minute Calculations (March 28)
60416. Bright gold plating is fine, but matte finish gold plating fails corrosion testing (March 25)
38877. Edges are burning in alkaline non-cyanide zinc plating (March 25)
60411. I polished the parts, then the plating shop plated them ... (March 21)
28863. Cyanide copper plating turns orange when dried open Q. (March 20)
17382. Citric Acid for Nickel-on-Nickel Plating? (March 18)
20395. Rhodium is too porous for corrosion resistance (March 17)
40492. Rusty Satin Nickel Plating (March 17)
57461. What to do about an excess of carrier agent in nickel plating bath (March 13)
60410. Reduce cycle time for nickel plating (March 12)
33364. Silver plating on top of tin plating (March 10)
12731. Brush plating nickel onto aluminum (March 9)
40095. "Black Tar" on surface of Acid Zinc Chloride bath (March 9)
36290. Plating on stainless jewelry cracks when engraved (March 8)
49875. Ni-Cr Plating on Shock Absorber Spring fails CASS Test and also Peels (March 7)
    580. Ferrite cores disintegrating after plating or wire bonding camera open Q. (March 2)
36051. Blistering on Cadmium Plated Steel Parts after Chromate Passivation open Q. (February 27)
33386. About specifying zamak plating open Q. (February 25)
48281. Plating zinc die castings without copper strike open Q. (February 25)
30106. Zinc plating thickness vs. salt spray resistance open Q. (February 24)
10392. Poor coverage on interior of nickel plated Aluminum Casting camera open Q. (February 23)
22524. Suitable electrolyte for german silver plating on real silver product? open Q. (February 23)
45052. "Assisted displacement" / "Contact" plating (February 20)
44518. Discoloration of Tin Plating After Heat Treatment (February 20)
43592. Porosity problem in nickel plating open Q. (February 20)
36321. Need help achieving brushed nickel finishing (February 20)
33245. Passivation of dark trivalent chromium plating open Q. (February 20)
33930. Is it possible to electroplate gold onto a carbon electrode? (February 19)
  4156. Nickel sulphamate bath to make hologram (February 19)
  1269. Reducing stress and increasing ductility in bright nickel plating open Q. (February 18)
38067. Porosity in base metal causing plating problems camera open Q. (February 18)
37542. Pitting in Nickel Sulfamate Bath open Q. (February 18)
29746. Chrome plating of zinc die castings -- Problems and Solutions (February 7)
60342. Magnetism due to nickel plating (February 7)
60380. Chrome / Nickel Plating for High End Showers (February 7)
34821. Flash gold fails perspiration test open Q. (February 7)
  2114. Cadmium plating brighteners open Q. (February 3)
60379. Chloride stain mark on chrome surface open Q. (January 31)
  9755. Gold Plating on Copper: Is a diffusion barrier needed? (January 30)
56947. Voltages and rectifier selection for chrome plating process (January 24)
28851. Some problems with Process of Zinc-Nickel Plating (January 13)
12412. Brighteners for silver plating (January 11)
38877. Some problems in alkaline zinc plating open Q. (January 8)
56270. Discoloration of Zinc Plating with Yellow Chromate Treatment camera open Q. (January 5)
35361. Pyrophosphate and non-cyanide copper strike/plating process open Q. (December 28)
12486. Lacquer and zinc plating open Q. (December 28)
22709. What stones are hurt and unhurt by plating? open Q. (December 25)
54125. Fabricating a diamond polishing scaife by plating open Q. (December 25)
40943. Abrasion resistance of black zinc plating (December 17)
60339. How to get a lighter color gold plate (11 karat?) on vintage musical instrument? camera open Q. (December 2)
35480. Zinc plating and rust (November 30)
23301. Formulas for brush plating solutions for gold plating open Q. (November 27)
23685. Trouble with rose gold plating (November 27)
16467. Nickel strike plating on stainless steel open Q. (November 26)
  3795. How to overcome non uniform thickness in nickel electroplating camera (November 17)
60286. Micro Holes in Nickel Plating on Tungsten Rhenium Wire camera (November 15)
  7281. Low friction texture chrome plating (November 7)
51293. Can't get Zinc electroplating and chromate into threaded hole (November 5)
31938. How to separate cadmium and tin anodes open Q. (November 4)
  5694. Tarnish on tin plating (November 4)
  2215. Cadmium Plating thickness distribution problem (November 4)
26438. Gold anodes for a gold plating bath open Q. (October 31)
  8297. Plating is dissolving in alkaline non-cyanide zinc tank (October 27)
35258. Alternate Hard Chrome Mixed Catalyst open Q. (October 26)
60301. Nickel plating before Acid Copper Plating on Steel open Q. (October 24)
18493. Silver Plating Discoloration -- turning pink (October 18)
16894. 6% Sb HEEF anode corrosion in work area open Q. (October 18)
55289. LHE CAD plating solution turns white when current is on open Q. (October 18)
60284. Electrical effect on adhesion in plating tank (October 8)
28003. Silver Flashing vs Tin Plating of Switchgear Bus Bar open Q. (October 6)
  5106. Tin plated parts are black open Q. (October 2)

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

36730. White stains in electroless nickel plating of pendants (March 26)
42907. Brown stains on electroless nickel plated materials camera (March 26)
60350. Electroless satin nickel plating too sensitive to fingerprinting open Q. (February 20)
55101. Is it necessary to remove the wax from hollow electroformed jewelry? (February 18)
20973. Problems and Solutions in ENIG (Electroless nickel / immersion gold) (February 7)
45977. Electroless nickel plating is tarnishing (February 7)
    572. Salt spray test capacity of Electroless Nickel Plating of 10-20 microns (February 2)
  3408. Plating of ULTEM 9085 open Q. (February 1)
60315. Alternative to Woods strike on SST before Electroless Nickel plate (November 15)
41906. Dummying" an electroless nickel plating bath open Q. (November 9)
32382. Electrical contact resistance with electroless nickel plating (November 5)
60285. Why no electroless chrome platings available commercially? open Q. (October 7)

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

43412. PVD coating very small parts (March 19)
  7846. PVD coatings: color control (January 4)
60307. PVD Coatings for Erosion and Corrosion Resistance (November 10)

    2e. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

7666. Hot Dipped Galvanized Coatings: G90 vs. G60 (March 24)
40753A.Starting-up a Galvanizing Kettle: stacking Zinc Ingots open Q. (March 23)
45719. Hot dip galvanizing: what is reasonable dross & ash material loss? (March 20)
43365. Hot dip galvanizing flux Q & A's, Problems and Solutions open Q. (March 17)
59756. Need DARK galvanising alloy. What is black galvanizing? camera (March 6)
15377. How to build a Hot-Dip Galvanizing Kettle open Q. (February 19)
43825. When does a galvanising waste Zn recovery plant become financially feasible? (February 19)
60382. What is the deposition rate of flux on steel in galvanizing? open Q. (February 2) vip
40753. Galvanizing Kettle melted, why? Q&A's for starting-up and maintaining a kettle (February 2)
41349. Cutting up solidified zinc in galvanizing tank (January 28)
46161. White rust on galvanised railings at a waterfront house open Q. (January 22)
26015. Defective PVDF coated GI sandwich panels camera open Q. (January 18)
57322. Want 200 µm galvanizing -- what thickness steel is needed? open Q. (January 18)
54105. Aluminium additions to Galvanizing Kettle (January 18)
60351. Big Galvanizing $$ Savings by REDUCING DRY SKIMS (MZR, NIFTY, BETTER FLUX) by Dr. Thomas H. Cook (January 6)
54149. How many zinc ingots will be consumed in galvanizing 605 MT and drossing? (December 23)
23142. How to Coat galvanized screen black for solar heat applications (December 9)
22164. Difference between Electrogalvanized Steel and Hot Dip Galvanized Steel open Q. (November 27)
60311. When removing solidified tin, substrate becomes exposed open Q. (November 5)

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

19006. Black Finish for Stainless Steel camera (March 27)
    982. A fast way to get "slow rust finish" (March 25)
  7077. Black oxide on top of black nickel plating (March 17)
  1150. The black oxide process and gun bluing open Q. (March 7)
60393. Black oxide per Mil-13924 Q&A's about the spec (February 21)
60313. Surface issues with blackened steel rods (February 2)
60337. Caustic black oxide without tank immersion - could it work? open Q. vip (November 29)
38738. Black Oxide finish for iron "Bower-Barff" finish (November 22)
52408. Best Alternative to Black Oxide Plating (November 17)
45705. Is Passivation or Black Oxide Finish better for Stainless Steel? (October 25)
42163. Is black oxide (Ebonol C) suitable for cleanroom use? open Q. (October 18)


    2g. OTHER INORGANIC FINISHING: Mechanical Plating, QPQ, Metal Spray, etc.

60402. Heavy mechanical nickel plate (March 6)
  1207. Need information on Ferritic Nitrocarburizing (February 18)
13026. Graphite coating for heat and wear resistance (February 6)
60294. What metals can be electrolytically chromated? (December 26)
41952. Dacromet coating questions open Q. (December 19)


3. ORGANIC FINISHING PROCESSES . . .

    3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS

32574. Pinholes and roughness in CED coating open Q. (March 24)
18067. Uneven CED coating open Q. (March 24)
11694. E-coat finish and ground straps (March 17)
23620. E-coating vs. Powder Coating vs. E-coating Plus Powder Coating (March 6)
49724. Problems at corners/edges on e-coated part open Q. (January 17)
39698. CED Paint conductivity is dropping (November 30)
60321. CED coated metal is it wear resistant? (November 14)

    3b. POWDER COATING

46158. Powder Coating of PaintLok steel (March 26)
3650. Laser etch on black powder coating is okay, but on colored it's unclear & charred camera (March 6)
  5753. PPE for Powder Coating (January 14)
52691. Powder coating dissolving during solvent test (November 22)
38745. Need powder to meet Ford WSS-M2P180-A / WSS-M2P90 powder coating spec open Q. (November 4)
16565. Powder coating on small machined parts is thin on chamfers (November 1)

    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)
30273. Clear coating Cu/Ni/Sb/Au/Black Zinc plating on zinc die-casting for Anti-scratch camera open Q. (February 20)
56727. Gold Plating Iphones and mobile phones, Q & A's camera (January 2)
60320. How to obtain a PUD [Polyurethane Dispersion?] open Q. (November 14)

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

23536. Spray finish of silver nitrate, "Chrome look" paint" video open Q. (March 28)
60408. Coating Adhesion on sanded vs. unsanded 1018 CR Steel (March 26)
  4016. Scratch resistant coating for Poly Carbonate drinkware (March 22)
16643. Sublimation printing onto rubber open Q. (February 21)
  9298. Screen printing HDPE open Q. (February 19)
26316. Teflon to rubber bonding (January 31)
16257. Painting galvanized pipe open Q. (January 19)
37471. How to get paint to adhere to anodized cast iron (January 16)
22874. Painting Stainless Steel (January 2)
29692. Teflon recoating of pots & pans and kitchen utensils open Q. (November 30)
35573. Salt spray test of epoxy coated rebar open Q. (November 21)
13089. Is nickel or cadmium better in water based adhesive (November 13)
60314. Smudging of black ink during sublimation heat transfer process open Q. (November 9)
18779. Teflon coating of stainless steel open Q. (November 5)
  4016. What coating to protect clear plastic from abrasion/wear? open Q. (October 17)
60287. Contamination from Additives (PVC) in Wire Insulation Influences the Contact Resistance? open Q. (October 16)
16388. Putting Acrylic Paint on top of Nitro Cellulose Lacquer (October 11)


4. POST-TREATMENTS

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

58797. How to achieve Brown Zinc Chromate finish? camera (January 24)
15330. Cold blackening of copper is coming out red open Q. (January 10)
  2046. Yellow Dichromate inconsistent color shade (December 2)

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

  1397. Dewetting issue on products plated with nickel and tin (March 26)
56819. Discoloration from Hydrogen Embrittlement Relief after Plating (March 20)
44008. Is H2 embrittlement relief required for cad plated 15-5 PH? open Q. (March 10)
34791. Soldering Nickel plated components open Q. (December 13)
60330. Indium soldering over chromate conversion coating on copper (November 29)

    4c. STRIPPING, REWORKS, ETC.

40345. Stripping peeling chrome rims camera (March 24)
24520. How to remove anodizing from anodized stainless steel parts? open Q. (February 4)
33078. Strip (remove) Copper Plating open Q. (February 3)
  2076. Removing anodizing from aluminum open Q. (January 11)
21422. How to Strip nickel plating from iron or steel open Q. (December 29)
36816. Proper solution ratio for stripping bronze plating off racks open Q. (December 20)
34072. Can a plating be professionally removed? (December 17)
  4884. How to remove 12µm Aluminum oxide on Aluminium alloy (December 16)
60300. Removing Yellow Chromate color from a zinc plated part (November 15)
29778. HCl won't strip Chrome from Ceramic (October 27)
11442. Removal (stripping) of zinc phosphate from steel open Q. (October 23)


5. SUPPORTING ISSUES

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

  1216. Interrupted baking for hydrogen embrittlement open Q. (March 26)
  3999. How to distinguish between zinc and cadmium metals? camera (March 24)
36214. Analytical procedure for Selenium Copper blackening solution? (March 19) vip
11434. Cyanide Copper plating Solution Analysis (March 15)
46657. Process/Procedure for Cross Hatch Test - Measuring Adhesion by Tape Test (March 3)
11573. How to measure efficiency of cleaning of metal? open Q. (January 15)
  7652. XRF method for plating thickness measurement open Q. (January 4)
12323. Chromate drop test to verify absence of hexavalent chromium (December 19)
10549. Testing/analyzing Baths for Passivation of Stainless Steel open Q. (December 16)
10807. Corrosion tests for anodized aluminum quality open Q. (December 12)
12044. Testing if there is nickel plating under the chrome (December 7)
14488. Salt Spray Standards - What do they really indicate? (November 22)
50132. Adjustable angle panel racks for salt fog cabinets open Q. (November 16)
34271. How to identify plating on antique police badges camera open Q. (November 13)
57020. Criteria to decide if component passed or failed Salt Spray Test open Q. (October 17)
41654. Determine % Nitric Acid by Titration? (October 14)
  1285. Can't Measure Thin Silver Coating on Copper with Mb-tube XRF open Q. (October 5)
60279. How to repeatably generate corrosion at an accelerated rate on brass components? (October 2)

     5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

12873. Silica removal from water open Q. (March 20)
  7063. Recovery of copper from electroplating and etching solutions video (March 20)
60409. Disposing of nickel acetate and copper acetate solution (March 13)
60403. Excessive amount of caustic to treat effluent from pickling plant (March 10)
51446. Ferric chloride or sulphate vs. ferrous chloride/sulphate open Q. (February 28)
41896. High TDS problem at effluent treatment plant open Q. (February 20)
32443. Can we boost pH for mixed bed, but not conductivity? (February 19)
46369. Buffer for nickel electrowinning (January 30)
  7245. Reducing COD in waste water open Q. (January 30)
30932. Ion Exchange / DM plant calculations open Q. (January 23)
33620. Boiler treatment issues and solutions open Q. (January 21)
14022. Recovering gold from plating waste water open Q. (January 7)
  3948. Characteristics of wastewater from electroplating industry open Q. (December 19)
60341. Reduction of ethylene glycol COD in effluent water open Q. (December 16)
20156. Removal of Calcium from wastewater open Q. (December 16)
41130. Re-use of high TDS waste from RO system? open Q. (December 13)
55252. How to separate cation resin from anion in a mixed bed (December 12)
32633. Tube module settler vs. lamella plate clarifier open Q. (December 7)
12891. Reduce sodium hydroxide consumption for neutralisation of spent acid (December 1)
33660. How to improve pH for DM water (November 15)
35032. Urgently need to know about regeneration of cation, anion, mixed beds, and regenerant preparation open Q. (October 24)
60288. Beef plant effluent sedimentation (October 13)

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

14264. Safety of patching a meat smoker with a 2" square piece of galvanized metal. open Q. (March 25)
  9098. Fumes from burning or welding Galvanized Iron (March 19)
21703. Is galvanized desk organizer safe? open Q. (March 15)
16433. My husband is sick from welding galvanized steel (March 6)
29644. Need help with disposal of new unused Sodium Cyanide (February 24)
  3606. Black Chrome Plating of a Still (February 18)
10826. Consumer available product to coat accessories that are not nickel free? open Q. (January 19)
34726. Can I use galvanized metal for kitchen tabletop? (January 7)
22092. Ruthenium Plating Process (January 6)
  7164. Is galvanised steel poisonous? open Q. (December 28)
33758. Gold turns skin black open Q. (November 30)
22201. Killing roots with copper sulphate. What happens in drain/sewer pipe? (November 13)
  5052. Environmental impact from chrome plating process open Q. (November 10)
11722. Are 24k Electroplated Pots & Pans Safe? open Q. (October 12)

    5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

60417. Rinse tank turns brown in a short time camera (March 25)
60389. Boiling nickel plating solution turns dusty parrot green camera (March 18)
60401. Safety of locating anodize rectifiers near painting & powder coating open Q. (February 27)
  6151. What is involved in setting up a zinc and clear plating line? open Q. (February 19)
31265. Should non-electrified metal tanks be grounded? open Q. (February 3)
60316. Solar Powered battery rack as Electroplating Power Source? vip (January 1)
51573. Hard anodizing chiller sizing open Q. (December 19)
32578. Chrome plating mist /fume control (November 16)
60323. Carbon Fiber Anodes? open Q. (November 15) vip
60308. Cost $$$ (cap-ex) to open a small commercial gold plating shop? open Q. (November 4)
34366. Caustic tank liner material (October 24)
  8925. Longevity of Polypropylene (October 24)
39416. Sulphuric Acid Resistance (for Concrete Walls?) (October 5)

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

46175. We need NADCAP certification (March 28)
34052. Manganese phosphate coating on steel (March 9)
50746. AMS 2700, Method 2, Type 2 (March 7)
42063. Q&A on MIL-P-23377 primer open Q. (February 23)
14057. ASTM or ISO spec for mill scale? (February 3)
44376. Looking for Boeing Finish Code F-1003 open Q. (January 22)
    097. Plating training in Malaysia or Singapore? open Q. (January 15)
    645. Need books about plating open Q. (January 8)
57091. Ban of Cadmium plating in India? open Q. (November 15)
42063. Using MIL-DTL-53030 Spec in lieu of MIL-P-23377?open Q. (November 7)
39060. AMS 2404, 2405 Specs & Testing (October 25)
  5396. Dwg. says Ra6.3; we did Ra1.6 -- is it okay? (October 22)
47674. Difference between MIL-C-5541 Class 1a and MIL-DTL-5541 Type 2 Class 1a (October 13)


    5f. WORLD WIDE WORD OF THE WEEK

60388. Passivation per MIS-20134 (February 20)
60376. Madsnell Etch open Q. (February 7)
  2788. What is "BUFF#200" finish, presumably Japanese? (February 7)
60304. What is "Emulsion Passivation"? (November 7)

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

26136. Alternatives to decorative chrome plating open Q. (March 8) vip
  4600. Cleaning flux residue from Aluminum without nitric acid (February 19)
51045. Cost efficiency of "Never-dump" Chromates? open Q. (January 20)
57850. Is ASTM B633 Zinc Electroplating RoHS Compliant? open Q. (December 12)
10089. Is cadmium plating always RoHS incompatible? (November 16)
35470. Hexavalent Chromium Content and RoHS (October 22)
14207. RoHS Chromate Conversion of Mg Alloys? open Q. (October 7)
60281. Is MIL-P-18317 Plating RoHS Compatible open Q. (October 5)

    5h. MOSTLY METALLURGY

50226. Difference between Stainless Steel grade 304 and 202 open Q. (March 18)
12545. How to Anneal Stainless Steel to Soften It open Q. (March 2)
60377. Is it possible to gas carburize mild steel? (January 28)
55257. How to anneal barbells to bend shaft into circles open Q. (January 16)
12132. Protecting weld areas on 316L stainless steel from hydrochloric acid and sulfuric acid (January 2)
46234. Effect of Sulphur in AISI 303 open Q. (November 6)
60305. Black patches when continuously casting copper open Q. (October 27)
60296. Nitrided sheet metal parts warp after pickling open Q. (October 18)
32129. How to anneal brass camera (October 5)


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

  6238. Will anodized mag wheels retain high shine? (March 24)
  6590. How to paint a galvanized metal roof open Q. (March 24)
56581. Purple film on anodized aluminum? open Q. (February 24)
47254. Clean and protect copper sink open Q. (March 20)
21436. Cleaning headstone Bronze Markers (March 19)
16063. Stainless Steel vs. Galvanized for Water immersion (March 15)
28788. Can gold bracelet be gold plated (March 12)
  4651. Copper Plating Over 95/5 Tin/Antimony Solder (March 12)
10480. Refinishing Antique Metal Bed Frame camera (March 9)
  6082. Difference Between Chrome and Nickel Plating (March 6)
16699. Geneva Metal Kitchen Cabinets: Painting, Removing Dents (March 6)
37106. Trying to find a powder form of Sodium Hypochlorite to make 12%-15% bleach (March 6)
21693. Sealing Aluminum to prevent oxidation? open Q. (February 27)
18847. Amateur D-I-Y Copper Plating at Home open Q. (February 27)
41124. Q&A's Replating of Silver Rings (February 26)
31344. How do you tell the difference between gold and brass open Q. (February 26)
2456.   Zinc-nickel parts at home open Q. (February 26)
7398. Stripping chrome from old car parts (February 26)
  7423. Ospho pretreatment of metal roof before painting open Q. (February 25)
  3974. Removing Black Oxide Coatings open Q. (February 22)
  2406. Can't source ammonium chloride for zinc plating (February 21)
60291. Green Dust on the car chrome camera (February 20)
40763. Stainless steel and metallic taste (February 20)
36445. Remove chrome completely from an auto grill for painting (February 20)
35556. Stainless or nickel-plated parts better for smoker? (February 20)
24172. Etching carbon steel die-cutting knife open Q. (February 19)
22586. Is stainless steel hard enough for gun barrels? open Q. (February 19)
22541. Ceramic coating for black exhaust tips? (February 19)
19866. Cleaning zinc clad tabletop? (February 19)
21693. Sealing Aluminum to prevent oxidation? open Q. (February 19)
26801. Solving an electrolysis problem in home plumbing (February 19)
38657. Architect needs to mimic mill-scale finish (February 19)
11263. Painting of anodized aluminum window frames open Q. (February 19)
11146. Replacement for corrugated iron roof open Q. (February 19)
  7077. Does black nickel plating need lacquering? (February 19)
  5959. Will Ospho etch brass? open Q. (February 19)
55324. Contamination Stains on Gold Plated Brass (February 18)
57431. Preparing a Pewter Surface to be Oil Painted (February 18)
  9922. How Do I Clean Brass? (February 18)
31095. Stopping aluminium window frame corrosion (February 7)
13277. How long does it take for natural gas to corrode copper pipes? open Q. (February 7)
60384. How can I bond heavily rusted pieces of metal to each other? (February 7)
26415. "Chrome-look" paint / Chroming at Home (February 3)
37559. Inexpensive attractive finish on bonderized metal open Q. (February 3)
  2662. Preserving heat coloring of copper when clear coating open Q. (January 28)
26845. How to paint a stove top open Q. (January 22)
31597. Refinishing of Revereware Copper Bottom pans (January 22)
11428. Restoring a cast iron wood stove open Q. (January 21)
    790. How to antique copper open Q. (January 17)
19035. Hydrogen peroxide used for tile cleaning turned my stainless steel brown (January 16)
13388. Galvanized roofing for bathroom walls (January 16)
43464. Gold is turning my skin green open Q. (January 15)
35320. Costume Jewelry for Photo Jewelry open Q. (January 13)
  5048. How to Extract Gold from Computer Circuit Boards? (January 11)
  6773. Q&As about Gold Plated Flatware (January 11)
42765. Testing Red Gold open Q. (January 8)
    085. Problems and solutions for copper electroforming camera open Q. (January 7)
  7897. Aluminum saildrive is pitting; is copper bottom paint the problem? camera (January 4)
41408. Artist made me a steel fountain but it's rusting away immediately open Q. (January 4)
22798. Removing bright gold colored finish from Japanese pot metal replicas camera (January 2)
33531. Non-cyanide silver plating for jewelry items open Q. (January 1)
24233. How to age or rust galvanized steel open Q. (December 29)
60340. How to gold plate rough stone surface open Q. (December 23)
11972. Preparation of Rokusho patina (December 20)
60344. Want to give glass a frosted, pitted look open Q. (December 19)
25366. Inside of Cast Iron Tea Kettle is Rusting (December 18)
60343. Brown mold (growth) in acid copper plating tank open Q. (December 18)
53795. Want a chemical that heats up when mixed with water open Q. (December 18)
53424. Gold plating brass ammunition (December 13)
14061. Power supply requirements for anodizing (December 12)
52522. Grout cleaner stains on my chrome fixtures (December 9)
16945. 1001 Q&As on Corten rusted steel open Q. (December 7)
37255. Zinc Plating a Cast Iron Carburetor (December 5)
25532. How to Rust corrugated Galvalume steel open Q. (December 4)
45494. Jewelry ruined by water (December 1)
29192. Tell me how to reline/re-tin copper pots & pans (December 1)
17571. Painting Bathroom Faucets / Fixtures (November 30)
30442. What paint do I use on a metal mailbox? (November 30)
43983. Have I found Platinum? (November 26)
28963. What could be causing the pitting and corroding (November 23)
60326. Allergic to Silver -- will Rhodium Plating It Help? (November 22)
29724. Can I plate cupronickel from mix of copper sulfate and nickel sulfate? (November 21)
27423. Electrolysis separation of copper/silver/gold (November 18)
30306. Nickel sulfamate formula for D-I-Y plating (November 15)
39975. How do I paint on plastic mesh camera (November 13)
48843. Which acid makes the color of gold orange? open Q. (November 11)
43465. Distressing a mirror which is fixed to the wall and can't be taken down camera open Q. (November 10)
  9404. Baking soda lightened by gold ring (November 7)
41517. How to make gold plating last longer? (November 2)
19891. Remove chrome from new solid brass Chicago Faucet open Q. (November 1)
51933. Rare 1935 magnesium Bugatti needs Bright, Silvery Finish! camera (October 31)
15006. Will 18kt gold plating tarnish? (October 26)
23300. Magnetic Levitation (October 25)
  7485. Nickel + palladium barrier layer for silver plating on brass is peeling open Q. (October 24)
58797. Where or how to get brown zinc chromate finish open Q. (October 23)
41930. Aluminium shade battens screwed to hot dipped galvanised steel frame open Q. (October 18)
40929. Need re-nickeling of copper pots (October 17)
34318. Cast iron Claw-foot Bathtubs (October 16)
  3338. How do I stop copper oxidation? open Q. (October 14)
60290. Can I plate over zinc phosphate? (October 14)
21483. Cleaning, Polishing & Refinishing Bronze Cymbals (October 5)

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

  8007. What part does voltage play in electroplating? (February 26)
54203. Electroless nickel plating of cast iron for school project (February 20)
34579. Does electrical resistance change if conductor is in tension? open Q. (February 2)
35289. Anode for pulse reverse plating of chromium camera (January 26)
60353. Pickle Inhibitors for 300 series Austenic Stainless open Q. (January 16)
34692. Why not electroplate a gold look with iron pyrite? (January 14)
14623. Science project on electrolytic cleaning plates (January 10)
60310. Thermal effects of drilling steel (January 1)
60228. PVDF coating PVC coated fibers (January 1)
60231. More metal was electrodeposited at low flow rate than at high flow rate (January 1)
13255. Stainless steel pipe for sea water (January 1)
60274. Gold coating on PVDF (January 1)
29312. Formaldelhyde leaks into boiler at shutdown (January 1)
60348. How can Tungsten, Tantalum, and Iridium be plated to Aluminum (December 29)
15559. Silver extraction from x-ray testing open Q. (December 17)
39340. What dissolves gold nano-particles? (December 12)
43283. Palladium over silver for electrodes in salt water? (December 5)

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

26613. After silver plates out onto copper, how to remove copper to restore solution back to nitric acid? (March 28)
  7278. Building Black-Powder Cannons open Q. (March 24)
27653. Rate of penny corrosion youtube (February 23)
60392. Acid/alkali color changing demo for Cub Scouts (February 21)
21478. Why worry about "burning" copper sulphate? (February 19)
    139. Why does this electrolytic derusting trick work? (January 24)
11608. Science project: Gold Quarter Coin open Q. (January 22)
26203. Fruits making electricity? (January 16)
11675. Understanding and converting resistance, resistivity, conductance, and conductivity (January 11)
13443. Why do citric acids clean pennies best (January 6)
33608. Why does soda dissolve a penny (December 9)
  8159. Pennies in apple cider vinegar turned black (December 2)
14038. How much copper sulphate would you consume before you die (December 2)
18683. Science project: paints to prevent rust (October 29)
  7801. Science Fair Project on Conductive Metals open Q. (October 12)

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

31683. Working Principle of Urea Reactor open Q. (March 21)
60385. Resin to make spiral staircase balustrade (February 26)
13743. Maple Syrup Boiling / Evaporator Pans: use Mild Steel or Galvanized or What? (February 26)
60399. Bleaching Saguaro (Cactus) Skeletons open Q. (February 24)
12123. PVC thin profile formulation open Q. (February 22)
29544. Washing machine drain line backs up (February 22)
53511. Recovering gold from cyanide copper plating waste open Q. (February 20)
17806. How to Change a Ring from Yellow to White Gold (January 24)
18889. Removing gold from electronics open Q. (January 22)
21024. Chromate poisoning from concrete work? open Q. (January 22)
34676. Best and Easiest way to refine gold open Q. (January 16)
10153. Sedgwick Residential Elevators open Q. (January 16)
23016. Removing thrown egg -- now frozen -- from car (January 10)
20150. Permissable gold losses in refining (January 3)
29294. 18/10 vs. 18/8 and 18/0 stainless steel for pots & pans open Q. (January 2)
52856. Muriatic Acid for fiberglass shower/ tub (December 31)
10275. How to remove water stains / white rings from wood tables open Q. (December 30)
31079. How to Make Artificial Sweat and Conduct Testing (December 29)
37685. How to Refine Rhodium and Separate from Gold open Q. (November 22)

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