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The finishing
com Hotline Public Forum
0. CORROSION, COMPATIBILITY, CHOOSING A FINISH . . .
37526. Want gold colored finishes without use of gold open Q. (October 29)
30286. What happens to stainless spring if attached to part while it's zinc plated? open Q. (October 29)
27167. Galvanic corrosion issues: aluminum and stainless steel (September 29)
07352. Want rainbow iridescent coating open Q. (September 27)
23255. Aluminum Rivets / Aluminum Channel (September 17)
07984. What spring material is resistant to 30% HCl? open Q. (September 17)
13807. High Friction Coating Material? (August 27)
61135. Chrome plating banned. What will substitute? open Q. (July 21)
46389. Removing rust from bearing rail (June 25)
61132. Kombucha and Stainless Steel open Q. (May 27)
08611. What coating for a new line of cast iron salt & peppers shakers? 
(May 19)
60988. Need Hard, Inexpensive, Corrosion Resistant Stainless Steel (April 18)
18779. Teflon Coating of Stainless Steel open Q. (April 14)
01686. Hard Chrome Plating vs. Plasma, HVOF, Flame Spray (April 3)
07897. Galvanic issue with copper terminals on galvanized electrical boxes (April 1)
1. PREPARATION . . .
1a. MECHANICAL PREP
[GRINDING, POLISHING, VIBRATORY FINISHING, BUFFING, HONING]
42216. Cottonball and/or Mirror Finish open Q. (October 2)
08632. Vibratory Polishing of Automotive Wheels (July 9)
45366. Acceptable visibility of polishing lines on mirror polished stainless, if any? (July 2)
61098. Proper Buffer Work Height? (May 19)
61106. Need 5RA finish on .180" elbowed hole in 316L open Q. (May 13)
05054. Videos of polishing stainless steel coil? open Q. (April 2)
1b. PRETREATMENTS
[CLEANING, PICKLING, ETCHING, PHOSPHATIZING, ACTIVATION]
37928. 718 nickel parts discolor when pickled after EDM open Q. (October 26)
37180. Vibrofinishing doesn't remove scale ... will acid? (October 25)
10242. Zinc Phosphate coating problems & issues; Q&A's (September 9)
00395. Alkaline Rust Remover Formulas, Q&A's (September 6)
61101. Electrolytic acid works on outside of welded steel tanks, but inside rusts (June 16)
13366. Zinc phosphate has yellow stains (June 15)
45662. Sandblasting Versus 5-Step Dipping Process? Pretreatment for Powder Coating? open Q. (May 22)
41404. Rusting after zinc phosphating open Q. (May 14)
34052. Black and White Spots after Mn Phosphating open Q. (May 1)
1c. MASKING, RACKING, TAPING, PLUGGING, PHOTOSENSITIVE MASKS
03836. Masking problems in chromic acid anodizing open Q. (October 26)
46445. Need TURCO 5580-G / BONDERITE S-MA 5580 G masking product RFQ (October 21)
59199. How to achieve two tone finish on jewelry? (July 20)
05476. Masking material / method for electroless nickel plating (March 21)
2. INORGANIC FINISHING PROCESSES . . .
2a. STAINLESS STEEL & TITANIUM PROCESSING
17652. Staining & Pitting of 304/304L Stainless Steel after cleaning (October 29)
61104. Baffling Citric Acid passivation bath issue open Q. (October 25) 
09252. Titanium Tumbling/Polishing/Vibratory Finishing vs. Electropolishing (October 16)
32993. How to gel pickling paste? (October 10)
09061. Recommended process cycle for UDI open Q. (October 1)
05422. Electropolishing defects open Q. (September 30)
46108. Passivation Process for 304SS Fasteners for Battery (August 17)
53913. Creating a rough surface on titanium, Ra >4 (July 16)
12570. When does nitric acid need replacement when Passivating SS 316L? (June 25)
39278. Surface Contamination of Stainless Steel Resulting in Red Rust Spots open Q. (May 28)
17774. Type 303 parts burned during passivation (May 9)
01744. Free-cutting stainless for 400 hours of ISO 9227 salt spray test (May 3)
2b. ANODIZING AND LIGHT METAL TREATMENTS (Aluminum, Magnesium)
12445. Dichromate color blotchy on Type IIB anodizing open Q. (October 30)
57240. Blackening of ADC-12 Aluminum in Humidity Testing open Q. (October 29)
01611. Parameters for Pulse Hardcoat Anodizing 2xxx Aluminum open Q. (October 29)
61161. Type 1100 Aluminum Burns During Anodizing (October 27)
33956. Creating 'antique zinc' patina on raw aluminum open Q. (October 27)
05333. Can we anodize cast aluminum alloy car wheels? open Q. (October 27)
01148. Tell me about "cold anodizing" (October 26)
43248. Inorganic black dyeing of aluminum? (October 26)
61158. Chrome plating and matte black anodizing open Q. (October 20)
57001. Q&A, Anodized Parts are Pitting -- Problems & Solutions (October 20)
25040. Bright dip "tearing" line open Q. (October 19) 4th Request
00080. Anodize Issue: is pitting due to material, machining coolant, etching, or what? open Q. (October 7)
50211. Sealing of anodised aluminium and testing of sealed layer (October 6)
61091. Energy savings in high temperature Type II anodizing (October 1)
18483. Clear Iridite for Boat Railings (September 12)
58771. Clear Zinc Chromate has 'burn mark' open Q. (September 11)
07152. Plating onto Magnesium? Q&A's open Q. (September 4)
15288. Bright dipping vs. standard anodizing process (September 3)
16229. Can Mil-5541 trivalent touch up pen by used on ASTM B449 parts? (September 3)
54202. Cleaning Alodine with IPA leaves yellow stains on cloth open Q. (September 3)
26918. Discoloration of New Anodized Aluminum Window Sill Flashings open Q. (August 28)
27828. Setting up hard anodizing on 7075 aluminum alloys (August 26)
46468. Anodizing 7075 & 7xxx aluminum. Problems & Solutions, Q&A's (August 24)
14462. ASTM B136: Is this result pass or fail? (August 22)
61139. Manual anodizing versus automation (August 20)
13822. Quick dissolution of aluminum cathodes (August 16)
57881. Identical parts anodized exactly the same look different (August 15)
61137. Pretreatment Steps for Anodizing of AW 2017 Aluminum? (August 1)
03227. How to prevent poor extrusion and blotchy unneven anodizing open Q. (July 30)
41155. Materials of construction and how to do Boric-sulfuric anodizing 2nd Request (July 28)
04511. Dusty Surface on Chemical Brightened 6061 Parts (July 24)
44324. Bead Blasting of Aluminum: Specifications, Q&A, Problems & Solutions (July 17)
40100. Sealing Process for Hard Anodize MIL-A-8625oen (July 16)
45936. Chromic acid anodizing of 7075 Aluminum open Q. (July 9)
55804. What is the life of Clear Alodine coating on Al? (July 2)
06701. Same anodizing voltage, time, & area as always ... but thickness is lower (July 1)
61130. Need black anodized aluminum Iphone 7 Repolished RFQopen Q. (July 1)
34125. Sulphuric Anodise Upgrade Problem (June 28)
61127. Facing black marks from grinding anodized aluminium (June 23)
01988. Allowable Storage Time between blasting and coating aluminium casting open Q. (June 19)
50982. Copper is depositing on anode & cathode in anodizing tank? (June 19)
56735. Loss of mass after Anodic oxidation of aluminium (June 12)
47480. Pretreatment of A356 aluminum before anodizing (June 12)
42711. Anodized 2xxx aluminum alloy fails 48-hour CASS test (June 8)
39286. Anodized parts are too light in color (June 7)
05112. Ematal Process, Opalizing: Special Aluminium Anodizing open Q. (June 2)
61116. Conductivity and anodized Aluminum (May 31)
61114. Must aluminum be blasted before ceramic coating? open Q. (May 28)
35677. Protecting non aluminum metals when anodizing (May 27)
45834. How to print patterns onto Anodized Aluminum (May 24)
60958. Hard Anodizing On a Budget (May 24)
04343. Coating small aluminum parts in bulk for seawater resistance (May 11)
61100. What is Nickel Fluoride Bath - Dow, British 830,597 (May 11)
37711. White Streaks during anodizing of 6063 extruded Aluminium (April 27)
44807. Mixing stainless steel parts in anodize process? (April 8)
2c. ELECTROPLATING and ELECTROFORMING
00713. Decorative chrome plating without copper plating first? open Q. (October 30)04076. Turn iron into gold color (October 28)
28032. Electroplating with Brass (Electrodeposition of Brass) (October 26)
26274. Nickel bromide for nickel sulfamate plating seems terribly expensive (October 26)
32623. Black Spots/Patches in Acid Zinc Plating
open Q. (October 25)15007. White Patches observed 4-5 days after Alkaline Zinc Plating (October 22)
29461. Nickel plating on leaded steel bubbles at soldering temperature
41922. Nickel plating white patches and dullness
open Q. (October 12)49988. No cadmium plating coverage on large or rough parts
(October 11)25432. Zinc-Nickel Plating
(October 11)50375. How much gold plating thickness corresponds to 0.25µm rhodium thickness? open Q. (October 11)
46818. Gold over nickel plating is Pitted
open Q. (October 10)40095. Edges of coin-shaped discs won't acid zinc plate open Q. (October 10)
59916. Nickel and gold plated components failing; is gold too thin? (September 29)
61103. Temperature limit for cadmium plated aluminum parts? (September 29)
44771. Acid Copper Plating Problem
(September 29)46141. Silver plated copper parts are turning brown (September 28)
42646. Operating a ZnCl2 plating bath without HCl open Q. (September 26)
26448. Problems Black Chromating on Zinc Plating open Q. (September 24)
61154. Plating of Parts Longer than Our Tank open Q. (September 17)
34107. Zinc-plate appearance problem (white, powdery, rough surface)
open Q. (September 14)47124. Passive anodes acid copper sulphate plating. Phosphorized anodes (September 14)
24316. Can White Bronze make up solution be used for Pen plating open Q. (September 11)
54953. PdAg Plating as intermediate layer for Electrical Contacts (September 9)
04834. Carbon Treatment of Nickel Plating Bath open Q. (September 7)
47263. Reducing chloride concentration in acid copper bath (September 3)
05302. Nickel Chrome Plating: "Stardust" Micro-Pitting
(August 31)51990. Parts turn black in Wood's Nickel Strike (August 30)
50185. Plating & Painting of Shopping Carts Q&A's Problems & Solutions (August 29)
61112. What maintenance is needed on trivalent chromate bath? (August 26)
28863. Problems in cyanide copper plating (August 23)
25409. Plating shop seeks formula for Uranium plating solution (August 22)
61145. Copper plated aluminum sand casting gets brown dots
open Q. (August 22)25982. Iron Plating (Electrodeposition of Iron onto other materials) (August 16)
11955. Chrome Plating Problems on Gravure Printing Cylinders/Rolls
open Q. (August 16)59257. Bright nickel plating over silver-bearing solder
(August 13)40743. Substitute/Alternate/Replacement for Rhodium Plating open Q. (August 12)
38047. Horizontal hard chrome plating plating vs. vertical (August 9)
33131. Chrome and gold-tone plating on brass (August 7)
04996. Black splotches on hard chrome plated rolls
open Q. (August 7)00902. Need info on Rhenium Plating (Electrodeposition of Rhenium) (August 6)
61088. Want Rounded Edges on Nickel parts plated on sheet SS (August 1)
15383. Nickel plating for high power water-cooled silver mirror? open Q. (August 1)
25523. Chrome plating a 75 mm dia. x 4m long shaft in a facility built for shock absorber pistons (July 30)
27736. Silver plating thickness distribution (July 28)
44143. Small White Spots In Chrome Plating (July 22)
23303. Nickel + Tin plating is cracking upon crimping? open Q. (July 11)
00496. How to Electroform nickel -- Introduction to Electroforming (July 6)
28610. Black rhodium wore off gold wedding band in days open Q. (July 2)
61131. No service for me from finishing.com (June 29)
01006. Is 250 micron non-cyanide [alkaline] copper plating possible? open Q. (June 28)
12243. Tin Plating Problems (June 28)
18854. Carbonate removal from a potassium cyanide bronze bath open Q. (June 27)
61128. Switching from Brush Cadmium plating to Barrel cadmium plating (June 26)
56595. Surfactant for Acid/Zinc Bath open Q. (June 23)
50276. Plating Thickness vs. Amps/square foot? (June 20)
45759. Nickel plating blisters and peels off 3 of 10000 racks of parts (June 19)
31884. Zin plating and chromating (June 16)
55192. Anodes for Alkaline Zinc-Nickel Plating (June 15)
35202. Matte Silver Plating Q&A. Problems & Solutions (June 15)
02236. I made PGC & gold plating solution but it turned yellowish (June 15)
14813. Zinc-nickel plated parts are failing Kesternich testing
open Q. (June 12)41517. Gold plating turns black and leaves green lines on skin (June 9)
60081. Over pickling leading to zinc plating issues?
open Q. (June 9)50922. Why lead and titanium anodes being used together in Chrome plating (June 4)
33784. Can you plate zinc castings with 1/2% lead? (May 19)
01029. Chrome Plating Shop Wants to Plate on Fiberglass open Q. (May 13)
51925. Silver anodes are expensive; we want alternative (May 11)
35480. Zinc plated components got rusty during transport by sea open Q. (May 9)
25483. Rust bleeds from welded seams after zinc plating
(May 9)46145. Blistering issues plating over porous zinc die cast surface
(May 8)02797. Strange look to defective nickel strike on stainless
(May 8)17612. White corrosion on cadmium plating
(May 7)47519. Nickel & chrome plating Q&A for rotogravure open Q. (May 5)
00473. Removing/freezing excess carbonate from cyanide silver plating tanks (May 2)
43239. How to do nickel plating with a "butler finish"? open Q. (April 30)
03892. After carbon treatment Ti-Cad plating is rough
open Q. (April 25)40136. Hard chrome plate 0.03" thick, or better to use nickel underlayer? (April 20)
03013. Satin nickel plating process open Q. (April 9)
01219. Copper is depositing on titanium anode baskets in cyanide copper plating open Q. (April 8)
03085. Considerations for electroplating of ZA-27 diecasting alloy (April 7)
23629. Cost calculation for plating (April 3)
28851. Peeling Problems in Zinc-Nickel Plating open Q. (April 2)
2d. ELECTROLESS PLATING, PLATING ON PLASTICS, IMMERSION PLATING, CHROME-LOOK SPRAYS, LIQUID METAL COATINGS
25101. How to Electroless Plate PBT Plastic? (October 17)
36290. Nickel plating / striking on stainless steel (August 15)
47083. Wrinkle marks visible in copper plating open Q. (August 9)
61134. How to prevent fungus on plastic chromed surface in production open Q. (July 17)
46476. Electroless Nickel (EN) Plating on Aluminum (July 17)
25680. Need Guidance Electroless plating CBN Onto 304 Stainless Steel? open Q. (July 8)
61129. Patterns at Tops of Parts in Electroless Nickel Tanks (July 2)
00934. Electroplating non-conductive material (June 21)
61124. Primer for liquid metal top coat open Q. (June 8)
39153. Salt Spray Test Hours for Electroless Nickel over BeCu (May 12)
18069. Plating on Plastics: ABS vs PC/ABS -- What substrate to use? open Q. (April 1)
2e. PVD, CVD, ION IMPLANTATION, VACUUM PROCESSES
43061. PVD coating on SS wire (August 20)
07846. How to get white color with PVD? open Q. (July 30)
13115. 24 karat gold color PVD TiN? open Q. (May 1)
2f. GALVANIZING, ALUMINIZING, HOT TIN DIPPING
52776. Pre-Galvanized Sheet vs. Post-Galvanized Components open Q. (October 28)
57460. Rinse tank operating guidelines for galvanizing plant (October 27)
49676. How to calculate and measure the thickness of zinc coatings open Q.(October 27)
46006. Rough & lumpy low quality galvanizing (October 13)
56797. Discolored weld seam during hot dip galvanizing open Q. (September 28)
61141. Galvanizing of very thick plate is silvery and non-adhering (September 9)
61110. Remove hand sanitiser stains from hot dip galvanised material (September 4)
54709. Dichromate for hot-dip galvanizing (July 22)
21047. Treating galvanized steel sheets to avoid white rust (July 18)
49901. Welding of hot dip galvanised kettle open Q. (July 12)
22164. Difference between electrogalvanized and hot dip galvanized steel (June 8)
41367. Zinc consumption control in hot dip galvanizing open Q. (May 21)
61094. Can we use Cold Rolled Sheet Metal for Hot Dip Galvanizing (batch type) open Q. (April 25)
57418. Galvanic compatibility HDG and Galfan open Q. (April 5)
2g. BLACK OXIDE, BLUING, COLORING, PATINATING, NITRIDING
36214. Cold Bluing of Screwdriver Tips open Q.2nd Request (October 27)
11776. Post black oxide oil application (July 30)
32413. Need sweet spirits of nitre for gun bluing (July 30)
61087. Black Oxide with Supplemental Coating (July 24)
13935. MIL-DTL-13924E Post treatment for 301SS open Q. (July 14)
32017. Black oxide on spring steel open Q. (May 29)
31820. Zamac 5 or 3 Post Machining Blackening open Q. (May 11)
13097. White residue on black oxide (April 6)
2h. OTHER INORGANIC FINISHING: Mechanical Plating, QPQ, Metal Spray, Zinc-rich Dip-Spin Coatings, Sherardizing, etc.
08591. Thermal Diffusion Coating Process (September 14)
10669. Anodizing Tungsten Carbide for Electrical Insulation open Q. (July 23)
3. ORGANIC FINISHING PROCESSES . . .
3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS
32574. 'Dents' in CED Coating open Q. (October 28)
39698. CED Paint conductivity is dropping (October 22)
51966. CED Coating Fails Bend Test open Q. (October 11)
39726. Can I replace epoxy e-coat plus powder coating with acrylic e-coat? (September 29)
23047. Reduce paint thickness in Cathodic Electrodeposition (CED) system? open Q. (September 17)
3b. POWDER COATING
45526. Need formula for epoxy powder coating master batch for bold structure/texture open Q. (October 29)
42644. Pinhole problem in Powder Coating (October 27)
01926. Can Powder Coat Be Used for Electric Insulation? (September 25)
32204. Powder coating problems on Aluminum (September 17)
21706. Problems & Solutions in Powder Coating of Steel Tubing open Q. (September 9)
45394. Cause of cissing defect in powder coating open Q. (June 19)
31082. Thermoplastic powder coating - Polyolefin Vs Polyamide PA11 open Q. (April 23)
47439. Issues Powder Coating Galvanized Steel (April 3)
3c. LACQUERS, CLEAR COATS, ELECTROPHORETIC TINTING, ANTI-TARNISH
01734. Polymer Coating of Sterling Silver as an Anti-tarnish Treatment open Q. (October 10)
61150. Protecting Engraved Manganese from Corrosion open Q. (September 12)
42425. Color plating of chrome - what's the process? open Q. (August 8)
06067. Prep before BR-127 Primer on Invar open Q. (July 6)
53021. Copper particles in ED Coating on Hard Disks open Q. (July 2)
15129. Best decorative finish process for Zamak5 open Q. (May 13)
3d. PAINTING, PRINTING, ADHESIVES AND OTHER ORGANIC COATINGS
02102. Poor adhesion of paint to aluminum open Q. (August 23)
33359. D-I-Y HDPE Primer (August 13)
61109. Visual change to finished Thermoplastic PVDF because of post painted heat open Q. (May 16)
26415. Clear coat peel off problem from spray chrome open Q. (April 24)
4. POST-TREATMENTS
4a. CHEMICAL POST-TREATMENTS
[CHROMATE CONVERSION COATINGS, RUST PREVENTATIVES, PATINAS, COLORIZING]
46777. Paint is peeling from chromated zinc plating (July 26)
47325. Zinc plating with blue chromate has fat brown stripe (June 19)
12511. Info on blue passivation (chromate conversion coating on zinc) open Q. (June 10)
61111. C377 Brass Forging turned silver from Scotch-Brite Polishing (May 23)
61105. Why is chemical conversion coating wiping off with Acetone? open Q. (May 12)
4b. BAKING AND NON-CHEMICAL POST-TREATMENTS:
[HYDROGEN EMBRITTLEMENT AND DE-EMBRITTLEMENT, ANNEALING, WHISKERS, SOLDERING, REFLOWING]
09676. Solderability of tin plate containing intermetallic compounds open Q. (October 12)
01216. Hydrogen embrittlement relief is softening our carburized parts open Q. (October 7)
00796. Hydrogen Embrittlement bake was NOT performed (September 25)
4c. STRIPPING, REWORKS, ETC.
40778. Stripping nickel from copper open Q. (October 19)
00988. Stripping Zinc-Nickel Plating (October 11)
21020. Nickel plating removal / stripping (September 25)
61153. Cyanide vs. Non-Cyanide Electroless Nickel Stripper open Q. (September 17)
14351. How to strip SermeTel (August 17)
61142. Sublimation coating removal open Q. (August 13)
61089. Stripping zinc nickel passivated with black hex from electroless nickel/aluminium open Q. (April 9)
5. SUPPORTING ISSUES
5a. ANALYSIS, LAB TECHNIQUE, Q.A., SALT SPRAY TESTING
44293. Calibrate a spectrophotometer with home-made standards? (October 26)
22320. Hull Cell Q&A open Q. (October 20)
20173. Preece Test on Galvanized Parts (October 16)
41654. Determine % Nitric Acid. Titration? Conversion factor? (October 11)
61113. Can M3 thread plug gauge be used on Nylon 66 plastic part? (September 8)
15616. Salt spray / salt fog pH variation (September 8)
03427. In-house lab setup for plating & anodizing shop (September 8)
30106. Zinc plating didn't rust in salt spray test, but peeled off open Q. (August 9)
35573. Painted part rusted in 48 hour salt spray test (August 7)
15586. Determination of boric acid in nickel plating baths (July 16)
24697. Analysis of Sulphuric Acid in Chemical Industry (July 4)
11434. Cyanide Copper plating Solution Analysis (July 2)
18375. Can I calibrate magnetic thickness gauge with a standard or must I strip a part? (May 28)
61107. Motor housing with sharp edges fails salt spray test (May 15)
26015. How do you test a surface to see if the coating on it is PVDF? (May 14)
44450. Determination of percent Oil in soak/electro-cleaner (May 11)
17894. Sodium Hydroxide: How to make to 0.5 M strength (April 1)
5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL
11909. Mixed bed de-ionizer / Water Polisher (October 18)
32578. Do other plating solutions use PFOS/PFAS wetters & fume suppressants like chrome plating? open Q. (October 16)
43864. Electroplating Wastewater Treatment Q&A's, Problems & Solutions: CN, Cu & Ni open Q.(October 4)
31963. Recovering tin from electroplating sludges (July 19)
41130. Alternative uses for high TDS waste from RO system? open Q. (June 24)
05582. Removing aluminum from anodizing bath, separating aluminum salts from sulphuric acid (June 12)
61070. Mixing Nickel strike with Copper sulfate bath for disposal (June 9)
32443. pH of DM water is a mystery open Q. (June 6)
60409. Effluent from Nickel Acetate Sealing (May 20)
13753. Treating plating wastewater then re-using it (April 6)
5c. SAFETY ISSUES, EMISSIONS, TOXICITY, ENVIRONMENTAL IMPACTS
08906. Safety Aspects of Chromate Conversion Coating on Aluminum (October 30)
00295. Does cyanide gold plating bath release hydrogen cyanide? (October 26)
47407. Chrome Plated Wrench Shards Injured Me (September 4)
40784. Is chrome plating safe for food processing tools or machines? (August 26)
24793. Safety of Galvanized Steel in home-made DIY smokehouse (August 13)
22256. Is Trichloro Ethylene (TCE) banned in India open Q. (August 2)
20858. Toxicity of nickel silver flatware (July 21)
20708. Hazards of eating off of rusted flatware (June 20)
21703. Toxic effects from galvanized food preparation utensils (June 12)
61086. Coronavirus copper plate door handles (May 14)
07164. Are galvanised aluminum shutters poisonous? (May 13)
5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION
39979. Cleaning a Silicone Contaminated Plant open Q. (October 26)
39112. How to clean filter press effectively? open Q. (October 21)
17769. Substitute for copper rod in plating barrel open Q. (October 16)
61155. Avoiding Tank Overflows (October 13)
38265. Why must Copper Bus Bar be Tin Plated? (October 7)
13245. Using uncoated stainless steel racks for nickel plating of aluminium (October 2)
61151. Rack/basket material for Iridite chromate conversion coating (September 14)
38160. Heating open-top tanks Q&A (September 5)
32320. Cost of PVDF pipe vs. cast iron (August 7)
02742. How to verify that ammeter reading is correct? (July 30)
61118. Material of construction for alkaline Zinc Nickel Plating process (June 1)
55973. Rack Distribution Study: Too much zinc plating thickness variation (May 15)
00829. Getting power to wire or strip without brushes or contact rollers (April 21)
56947a Coupling Rectifiers to increase amperage (April 20)
5e. QUESTIONS ABOUT SOFTWARE, SPECS, BOOKS, EDUCATION, INDUSTRY STATS, ETC.
61162. What is spec P56011 and P55004? open Q. (October 29)
09511. Metal Finishing Guidebook -- How to Get It? (October 24)
35810. Need Electrolift specification open Q. (October 2)
26629. Please enlighten us with PFZn5c open Q. (September 15)
28114. Paint Spec P510.2N open Q. (August 20)
56433. What is the standard thickness for zinc plating on sheet metal? (August 20)
02536. Plating Shop Software open Q. (July 21)
27698. Trouble with NADCAP Audits (July 21)
43572. Need a copy of MIL-DTL-5541D open Q. (May 29)
5f. W...W...W...WORD OF THE WEEK
03159. What does Surface Current Density mean? (July 30)
61136. What is this mystery "electroplating over paint" process? (July 24)
08792. What is 'Kelite'? (July 4)
17345. The "Secret of silver plating in Thailand" open Q. (May 22)
5g. REACH, RoHS, EOL Directive; Cd, Pb, Cr+6, Nitric Acid & Phosphate Replacements
45368. Does Trivalent Plating Revert Back to Hexavalent Plating (June 8)
40069. Chromate Delamination of Zinc Chromate from Zinc on Steel open Q. (May 15)
5h. MOSTLY METALLURGY; Heat Treatment
08114. Does grinding hurt stainless properties? open Q. (October 23)
40943. Can I strip & replate all motorcycle hardware to same black finish? open Q. (October 20)
27700. How to solder, weld, fasten Titanium (September 26)
61149. Problem of Brass finish burning off during sintering furnacing open Q. (September 8)
50226. Is 202 grade SS food grade? open Q. (August 27)
51470. Blacksmith's EN9 hammers aren't hardening right (August 20)
61146. Stainless steel dumbbells: economic corrosion-resistant grade? (August 20)
28258. Webster hardness of 6005 T6 aluminium open Q. (July 28)
33491. Discoloration of 310SS after brazing and heat treatment open Q. (July 21)
31110. Difference between aluminum vs. jig plate aluminum? open Q. (June 19)
14356. Gray/Black surface of austenitic steel wire open Q. (April 22)
35145. My Brass is Pink not Yellow (April 18)
32665. Heating zinc plated hook screws in order to bend the hooks (April 3)
5i. PRECIOUS METAL RECOVERY
38870. Separate gold, silver, and platinum from each other open Q. (October 22)
32894. Melt old gold to make new jewelry open Q. (September 26)
34676. Best and Easiest way to refine gold dust to get 99.9% purity open Q. (September 15)
18889. Reclaiming gold from electronics open Q. (September 14)
26990. How many computers for one ounce of gold? (August 20)
20150. Fineness of gold is lower after smelting open Q. (August 7)
41891. How to dissolve stainless steel but not gold open Q. (July 10)
26353. Cleaning gold that has been burned (July 3)
42389. Extracting gold from copper open Q. (June 22)
33616. Recovering Gold and Palladium from test strips (May 23)
52884. The economics of buying gold and having it purified (May 14)
20033. Recovery of fine floating gold (April 22)
6. CONSUMER, RESEARCH, & STUDENT ISSUES
6a. ARTISTS, HOBBYISTS, CAR BUFFS, HOME OWNERS, ETC.
31298. Cast Iron Stove outdoors? open Q. (October 28)
00085. Problems and solutions for copper electroforming open Q. (October 27)
54654. Chroming a Brass Fire Pole (October 27)
16643. How can I coat for sublimation printing on a low budget? open Q. (October 27)
12130. Current/Voltage for Aluminum Anodizing (October 26)
23481. Polished Aluminum Clearcoat Secret open Q. (October 23)
30700. Ruined silver candlestick when removing wax (October 21)
16306. Applying artist acrylic gesso to sanded Kynar aluminum panels open Q. (October 20)
46708. Rhodium plating is grainy open Q. (October 18)
61159. What to do with dog's head bas relief? open Q. (October 14)
46505. Sublimation Coating Q&A (October 13)
22507. Stripping Silver Plating from brass sconce (October 13)
38809. Antique baby carriage restoration Q&A's open Q. (October 12)
14122. Re-anodizing Aluminum which has been previously anodized open Q. (October 11)
21693. Sealing Aluminum to prevent oxidation? open Q. (October 11)
19652. Thick silver Electroplate in a Home Studio open Q. (October 9)
41460. How to give steel a dull appearance? open Q. (October 9)
18255. Anti-fouling paint for plastic boats (October 6)
28059. How to remove rust on vinyl siding (October 5)
41066. Dishwasher ruined shiny aluminum (October 2)
04913. DIY Nickel plating (October 2)
24520. Anodizing of stainless steel bolts to gold color (October 2)
42007. Can I paint a walk-in cooler? open Q. (October 2)
33203. How to make a paint stripper not harmful to plastic parts open Q. (September 30)
50455. Restoring the dark brown finish to copper sinks open Q. (September 29)
33531. Non-cyanide silver plating for jewelry & silverware (September 22)
57832. Plating onto lead-free tin solder (September 22)
22903. Ospho prep left tacky film open Q. (September 21)
13388. Galvanized roofing for shower, bathroom walls & kitchen backsplash open Q. (September 18)
36445. Removing chrome plating from plastic (ABS) parts open Q. (September 14)
16343. Blue/green/verdigris patinas for zinc open Q. (September 13)
35277. Can Brass Vase Be Filled with Water for Flowers? (September 5)
12044. Identifying nickel plating on brass (September 2)
10068. Remove stuck paper from plastic sheet (August 30)
37205. How to tell silver plated from sterling silver? (August 29)
43774. Cleaning silver ring that blackened (August 23)
38754. Nambé in the dishwasher dulled it. How to fix it. (August 23)
25637. Enameling of plated metal open Q. (August 20)
23536. Wetting agent for for 'spray chrome' open Q.(August 20)
27833. Type of paint for hand art on a vehicle open Q. (August 17)
52605. How to protect chrome for use outdoors (August 13)
16699. Geneva cabinet parts? open Q. (August 10)
14585. Rhodium plating on silver rings open Q. (August 9)
55951. Home nickel plating with vinegar and salt (August 7)
61140. Want motorcycle kickstand & centerstand that won't rust open Q. (August 6)
07137. Dirilyte gold-tone flatware: Cleaning / Polishing open Q. (August 5)
32168. How to waterproof Styrofoam? open Q. (July 30)
54890. Theda Sterling Silver Jewelry? (July 19)
52694. Solid silver with yellow patches (July 17)
24229. Homemade concrete stain open Q. (July 14)
06773. Q&As about Gold Plated Flatware (July 12)
49168. Remove paint but not a signature open Q. (July 9)
24664. Copper pipe electrolysis from touching steel? (July 9)
12602. How do you clean/restore old zinc countertop on Hoosier cabinet open Q. (July 8)
61133. Plating onto tin substrate open Q. (July 6)
30186. Lime-A-Way destroyed stainless steel sink (July 5)
12601. Need Teflon Spray for Cooking (July 5)
26881. Now my bright nickel plating process suffers pitting open Q. (July 3)
09585. How to Remove Varnish from Brass open Q. (June 28)
28788. What is electroplated gold? (June 28)
45056. Lead leaching from galvanised steel raised bed? (June 28)
30522. Penetrol or graphite paste for a structural column? open Q. (June 26)
60259. Best material for aluminum siding fasteners? (June 26)
18437. Remove rust and keep it off Mason jar lids open Q. (June 26)
18957. Brass spray nozzle stuck on an aluminum hose end (June 24)
56595. Surfactant for Acid/Zinc Bath open Q. (June 22)
55324. Prevent Tarnish on Gold Plated Silver & Brass (June 19)
00800. Preserving polished aluminum finish on classic toys (June 19)
45264. Galvanized metal and concrete Q&A's: anchor bolts, rebar, embedded pipe, wet cement (June 18)
60064. Gold plated 'jeweler's bronze' jewelry (June 15)
10497. Resistance of a chrome plating bath open Q. (June 12)
61126. Brush plating & patinating automobile sheet metal (June 10)
38381. Painting/powder coating a mid-century cone fireplace (June 9)
26699. Industry specs for powder coating thickness open Q. (June 7)
61123. Hardcoat Anodizing Polished vs. Blasted Aluminum open Q. (June 7)
43905. Brass plating of 3D printed plastic lamp (June 7)
61122. Lime Away took away the shine on my stainless steel fridge door open Q. (June 6)
61120. Need recommendation for protective adhesive: rhinestones to faux leather open Q. (June 5)
61097. Need Advice for Cleaning Aluminum Coil open Q. 2nd Request (June 5)
61119. Paint stripper for wood deck that rests on a rubber roof open Q. (June 5)
23096. Mild Steel Countertop Finishing (June 5)
29414. Copper plating solution questions (June 3)
07423. Paint not sticking to Ospho open Q. (June 1)
60503. Grout haze won't come off of penny floor (June 1)
32087. Best gold finish for costume jewelry (May 28)
56181. Lacquering or clearcoating of Anodising (May 27)
25827. Can't remove protective plastic film adhesive residue from stainless steel (May 25)
44569. F.B. Rogers Tea Sets (May 24)
31510. Screws for aluminum pool cages (May 23)
34465. Pre-coating for sublimation transfers onto ceramic open Q. (May 20)
59210. Acid copper plating of zinc coins (May 18)
24076. Is Heat-Colored 304SS more or less subject to corrosion? (May 18)
04125. Plating at home (May 15)
61108. Polishing a Mini Draco for Shiny Gold Plating (May 15)
22096. Polishing Aluminum TrickFlow Upper Intake open Q. (May 14)
05729. Etching copper designs & circuit boards (May 20)
30604. Dealing with rust in freezer coils open Q. (May 1)
6b. RESEARCH, THESIS TOPICS, UNIVERSITY & POST-GRAD STUDENTS
19274. Gold plating of aluminum and superconductivity (October 22)
00350. How to electroplate onto Tungsten (October 14)
42492. Electroforming of Nickel -- Nickel Sulfamate Experiment open Q. (October 5)
46254. How to measure nickel plating thickness without any device (July 15)
26556. Understanding the Equations for Electroplating Nickel (June 22)
61096. Rotating field for electroplating (June 5)
29724. How to do cupronickel plating (May 19)
04835. Mechanism of covering or throwing power improvements by cyanide (April 30)
6c. K-12 SCIENCE PROJECTS, GRAMMAR & HIGH SCHOOL STUDENT QUESTIONS
30852. Copper plating onto steel from copper sulphate (August 11)
18683. Rusting Nails: student experiment & research (June 5)
7. DRIFTED OFF FINISHING, BUT INTERESTING TO SOME OF US :-)
28915. Getting rid of odor in zinc lined oak icebox open Q. (October 29)
12373. Zinc oxide production by French process (October 22)
24359. Belmont Barber Chair problems open Q. (October 12)
18029. Problems in White phenyl Manufacturing open Q. (October 11)
22987. Make GOLD from Copper, Silver & Plant Extracts (September 29)
26176. Steelcase Tanker Desk Restoration Tips (September 14)
53795. Want a chemical that heats up when mixed with water (September 12)
35650. How did we get from calling it kitchen zinc to sink? (September 8)
28915. Getting rid of odor in zinc lined oak icebox open Q. (September 8)
31079. How to Make Artificial Sweat and Conduct Testing open Q. (September 4)
33777. Boiling Rings in Peroxide and Vinegar Stops Rash! (August 20)
19333. How can I get rid of a scratch in my toilet bowl? (August 17)
14057. Mill Scale Uses and Applications open Q. (August 11)
09128. How often must I re-add copper sulphate to my pool? (August 8)
38824. Can aluminum be brazed to brass? (July 26)
19039. Cast Iron Cook Stoves: Where to find parts and how to restore open Q. (July 10)
14123. Laws on black powder cannons? open Q. (July 6)
24395. Barber Chair Restorations open Q. (July 4)
33143. Stiffel lamps need repair (July 1)
37680. Zinc pest and newer diecast models (June 15)
33365. Shafting and bushing/bearing issues open Q. (June 10)
31904. Sealed concrete is now looking white open Q. (June 3)
13743. Maple Syrup Boiling / Evaporator Pans: use Mild Steel or Galvanized or What? (May 2)
15596. Sodium metasilicate stained car's glass and paint open Q. (April 25)
legend:
| ( ) | = Date in parentheses is most recent posting on the thread |
| open Q. | = Thread currently ends with a question, or the response leaves it partially unanswered |
| RFQ | = This posting is a combination technical question and RFQ |
| opinion! | = Comments may raise blood pressure |
| silly :-) | = For those with a sense of humor |
 | = Contains embedded video |
| | = The inquiry has photos / graphics |
 | = Contains embedded pdf |
| | = Inquirer often helps others, so especially deserves our help |
 | = Thread is partially in Spanish |