Archives of the finishing.com Hotline
Letters/threads 1 to 999
The finishing.com Hotline includes more than 50,000 Shop Problems, Q&A's and RFQs about metal finishing. This page is an archive of a thousand of those discussions. You may prefer to start at our home page, view the most recent threads, or search the site.
0001. Electroplating Skulls, Leaves, Flowers
0003. Clear coating Halibrand polished mag wheels
0004. Difficulties in reliably soldering Alloy 90 wire for current shunts
0005. Gold Plating of Wave Guides
0009. Black Stains on Hot Dip Galvanized Zinc Coating
0012. Electrical Resistance Testing of MIL-C-5541 Chromate
0013. Electroless nickel (EN) coatings for the oil and gas industry
0014. Gold plating, and questions on pulse plating
0016. Water Treatment for zinc electroplating waste
0017. Aging a copper roof to a nice blue patina
0019. How to Blacken Stainless Steel
0020. Zinc "whiskers"
0021. Electric heater problems, and zinc/cobalt plating vs. galvanizing
0022. Wash primers on top of iron phosphate
0023. Methods for ruthenium plating or any deposition method
0024. Activation of SST for plating
0025. Brightening Aluminum on vintage BMW Motorcycles
0027. Hobbyist has tin plating questions
0029. Where does Boric acid go when nickel plating
0030. Removing "remelt" after EDM on platinum-iridium
0033. Electropolishing of stainless steel
0034. Can high pH corrode SST?
0037. Albaloy, Miralloy, Optalloy copper/tin/zinc alloy plating
0039. Insoluble anodes to prevent metal buildup in acid zinc?
0040. Zinc carbonate formation and corrosion resistance of galvanized steel
0041. Black nickel plating process
0043. Heat absorbing/heat resisting paint
0044. Beginner's plating questions
0045. Problems in zinc plating of spot-welded chassis
0047. Alternative to ammonium bi-fluoride to etch aluminum
0049. Passivating 316 SS
0053. Jump starting electroless nickel (EN) plating onto copper and brass
0054. Low resistance inexpensive black coating on aluminum
0058. Seeking info about electropolishing stainless steel
0059. Nickel plating of antique marine hardware
0061. Passivating an electroless nickel tank
0062. Heat resistance of anodized aluminum
0064. How to do copper plating
0067. Seeking supplier of Medallion Liquid Gold do-it-yourself gold plating system
0068. Copper sulphate crystals in plating tanks
0071. Remove salt from steel surfaces, chrome wheel rims
0073. Does phosphating hurt stainless steel? Can Stainless be phosphatized?
0080. Bleedout problem from pits in anodized fishing reels
0083. Air emissions from sulfuric acid anodizing
0084. Electropolishing stainless steel
0085. Problems with electroforming copper
0086. Statistics on electroplating effluent please?
0093. DIY brush plating of automotive parts
0097. Where to get Training in Electroplating
0098. Electroplating with niobium?
0100. Beilby layer in Electropolishing of stainless steel
0102. Cyanide Copper plating vs. Acid Copper plating
0105. Anodized aluminum refuses to dye
0106. Plating of Aluminum Honeycomb Panels for a Telescope
0107. Solubilities of metal precipitated with DTC (dimethyl dithiocarbamate)
0108. Poor coverage in barrel zinc plating
0109. Plating onto molybdenum
0113. Zinc plating is rusting inside blind holes
0114. Zinc flame spray "gunning" for ship repair
0115. Improved process to finish aluminum for vacuum application
0116. Shelf life of chromic acid anodize coating
0118. Getting into the plating business
0125. Implications of phasing out Cadmium and Chromium plating
0128. Zero discharge, anyone? Closed loop wastewater treatment
0130. Repairing plastic-plated headlamps and auto trim
0132. Seeking literature on aluminum reflector surface gloss
0137. Rectifiers and ripple
0138. Rack plating with acid zinc
0139. Why does this electrolytic derusting trick work?
0142. Alternative to zinc plating? Tired of whiskers
0148. Can nameplates, etc., be made via color anodizing?
0151. Where to find meaning of German finish note Rz
0155. Wiping medical implants after passivation
0156. Minimizing grain size in gold plating
0157. Anodizing setup for student lab
0159. Measuring copper thickness in plated holes
0160. Substitute copper plating for half of the nickel thickness?
0161. Clear coating brass, copper and bronze
0162. So who doesn't want to bronze baby shoes?
0163. How is Plastic Chroming Performed?
0166. Wet vs. dry blasting
0167. What is Eutectoid plating?
0171. Tearing of Aluminum Extrusions During Buffing Operation
0173. Need info on Silver electroforming
0175. Experiences with black nickel plating?
0181. Paints to use for painting clean rooms
0182. Chemically polishing or electropolishing silver
0187. What is DEFRIC - FTB 116?
0188. Seeking alternative to amorphous fumed silica as jelling agent for brush plating
0189. Can brass plating look like gold plating?
0190. Maintaining low contact resistance on zinc plated chassis
0191. Seeking info regarding pull-test / adhesion test
0193. Corrosion of trivalent chrome plating vs. hexavalent
0194. Methods of heating process solutions
0196. Electroplating for a school science project
0198. Establishing an aluminum anodizing plant
0203. How about plating by solution voltage rather than current density?
0204. Black oxide solutions and equipment
0205. Etching of copper roofing panels for Artwork
0208. Pulse anodizing and new interference colors for anodizing
0210. Zinc-Nickel as replacement for cadmium
0211. Passivation of series 400 SST
0212. Can direct-fired embrittlement-relief ovens cause corrosion problems in the plating?
0214. Powder Coating exterior aluminum fences
0216. Seeking info for deep etching stainless steel
0217. Where does KOH come from in gold baths?
0218. Problems in nickel barrel plating
0219. Seeking info on galvanic corrosion
0220. Masking problems in powder coating
0221. Cyanide bombing to clean up gold jewelry
0224. Inorganic gold dye for anodized aluminum
0236. Stripping galvanizing from pipe
0241. ISO 9000 Certification Q&A's
0242. Removing boron from wastewater
0243. Will fume suppressants hurt bondability to chromic anodizing?
0246. Polishing of stainless steel
0247. Ammonia releases to air from etching of PCB's
0249. Plating of pot metal
0250. Etching of cobalt-chrome alloys, electropolishing
0252. What will powdercoat stick to that is conductive?
0253. Electropolishing concentrations and current densities
0254. Chrome look-alike for furniture
0255. Electroforming hollow tapered tubing
0257. Electroless nickel plating of ball valves
0260. Immersion tin plating of printed circuit boards (PCB)
0260a. Electroless tin plating of non-conductors
0261. FDA Specifications / approval for electroless nickel plating
0262. Replating of antique camera parts
0263. Codeposition of Teflon in a Nickel bath
0264. Measuring surface tension of chromium plating baths
0265. Electropolishing beryllium
0269. Activated carbon for treatment of cyanide
0270. What is the best casting alloy and how should it be treated?
0274. Will pulse plating harden the gold?
0275. Metal electroforming for optical encoder code wheels
0276. Looking for an electropolishing book
0278. Adhesion of nickel plate onto Titanium
0279. Seeking better treatment method for chrome etch
0283. Restoring 19th Century Door Hardware
0284. Hobbyist plating and hobbyist addition agents
0285. Need supplier for backyard plating shop
0287. Reporting aluminum sulfate for sulfuric anodizing solutions
0288. Electroless nickel to polymer bond strength
0290. What quality of surface finish is achievable by roller burnishing
0291. Zinc plating is too rough
0292. Substitutes for MEK?
0294. Cleaning anodized aluminum
0295. HCN fumes from acid gold plating
0301. Zinc plating the inside of gas tank
0302. Silver plating copper tubes
0303. Making sodium hypochlorite from salt
0305. Suppliers of nickel brighteners
0307. Seeking plating and surface finishing market research data
0308. Replication of microstructures
0309. Autocatalytic nickel-phosphorus (EN) as an anti galling coating
0314. Will anodized finish resist ammonium hydroxide?
0317. Are MSDS sheets needed for finished products?
0318. Stabilizer for hydrogen peroxide
0319. Anodes for electro-osmosis
0320. Gold plating of surgical instruments
0323. Adhesion problem in copper plating of lead bullets
0324. Carbamates causing false cyanide reading?
0325. Percent sulfate in aluminum anodize?
0327. Topcoat to prevent tin plating on steel from corroding
0328. Porcelain finishes for building exteriors
0329. Refinishing aluminum and chrome wheels
0332. Yellow-green stains on anodized aluminum
0336. Stainless parts rusting! Need a fix.
0338. Zinc plating of carburetors
0342. Seeking mil spec for cadmium plating
0344. Cyanide-free conversion coating for aluminum
0346. Coating for mold cavities
0350. How to prep tungsten carbide for plating
0352. Black chromate finish turns green
0354. Passivation of hypo tubing
0356. Solder plated copper wire turns black in baking oven
0358. Practicality of high voltage electrocleaning
0360. Air emissions from electroless nickel tanks
0363. Hard anodizing of high silicon aluminum
0365. Coating sapphire fibres with chromium
0366. Red rust on zinc plated parts
0367. Optical quality polishing of stainless
0368. Surface treatment for zinc die castings
0370. Rapid corrosion of buried gas pipes in Sedona Arizona
0371. Show me porosity in chrome
0373. Vapor forming vs. electroforming
0374. Cyanide-free restoration plating
0376. Electropolishing SST & aluminum
0380. Cleaning weld oxide on stainless steel
0381. Insufficient electroless nickel (EN) corrosion resistance
0382. Purification and re-concentration of phosphoric acid
0385. Extending the life of chrome stripping bath
0387. Tin/nickel electroplating
0391. Electroless nickel MIL-C-26074 obsolete?
0392. Cleaning of gold and silver jewelry
0395. Alkaline rust remover
0396. Need a low temperature firearm coating
0397. Are fume suppressants sufficient for chrome emissions standards?
0399. Need coating for 3XX stainless steel to prevent stress corrosion
0402. Armoloy coating
0409. Looking for additive to produce wrinkle finish in paint
0414. Wood finisher seeking an epoxy supplier
0415. Problems with plating silver on glass
0417. Two new technologies useful for chrome deposition
0420. Removing scratches from forged aluminum wheels
0421. Would like to know the units of measurement of surface texture
0425. Nickel plating of tungsten carbide pellets
0429. Looking for Sel-Rex contact information
0434. Non-cyanide silver plating baths?
0441. Process control of chromate conversion baths
0443. Organic acid inhibitors in HCl pickling baths
0445. Need to plate stainless steel plates with gold
0449. Direct metallization on ABS and ABS/blended polymer
0451. Need gold stripper for semiconductors
0452. Metallizing plastic diffraction gratings
0453. How to jellify concentrated acids?
0454. Flash to Zartan, Flash to Zartan, Bzzzz, Buzzz, Pop.
0461. Chemicals to clean Five-Stage phosphate machine
0470. Plating aluminum onto CuSi4Mn
0473. Silver tank has excessive carbonate level
0476. Alkaline non-cyanide zinc plating vs. acid zinc
0477. Problem with Wood's nickel strike bath
0478. Plating palladium onto lead frames
0479. Pickling and passivating of welded carbon steel pipes
0481. Wastewater treatment for pyrophosphate copper
0485. Chromated zinc isn't conductive enough
0486. Info about mechanical plating
0488. Want metal finishing videos
0492. Colors of anodized tantalum coatings
0495. Stainless steel vs. rubber lined piping in desalinization plant
0496. Introduction to electroforming of nickel
0497. Black hardcoat anodize 4032 aluminum?
0499. Marine corrosion prevention coatings
0501. Black anodizing aluminum rivets
0503. Problems in acid zinc plating screws
0505. Discoloration of anodized aluminum
0509. Chrome plating onto K-Monel 500
0513. Looking for alternatives to conversion coating of aluminum
0515. Need electroformed copies of Fresnel lens
0520. How to process parts through a return type automatic machine?
0522. Priming galvanized steel gutters before priming
0524. Cathode materials for chromic acid anodizing
0525. Silver sputtering
0531. Searching for black oxide specifications
0533. Final rinse before powder coating
0534. How to brass plate steel
0538. Finishing/plating screw drivers
0540. Is copper undercoat needed between aluminum and electroless nickel?
0544. Corrosion resistance of different resins
0545. Garage electroplating
0546. What is "Ferrocote"
0547. "Dacrotize" process
0548. Is this chromate or is it chrome plating?
0551. Composite particle plating
0552. Need a rubberized dip process
0553. Blackening hard chrome plating
0554. Okay to use aluminum cathodes in hard anodize?
0555. Copper plating of aluminum
0558. Seeking info on alternatives to nickel striking
0565. Using Magnesium Oxide in electroplating wastewater treatment.
0568. Construction plans for power supplies
0571. What is a "Chill Mark"?
0572. Salt spray standards for electroless nickel
0574. Chrome plating plastics
0575. Chrome plating aluminum
0576. Alternatives to electroless Nickel coatings
0580. QC problem in leadframe plating
0582. "Black Diamond" finish
0587. Need to repassivate after welding?
0588. Nickel acetate seal
0597. Does decorative chrome plating effect quality?
0598. Anodic films produced from sulfuric acid baths
0601. Coating alumina with copper
0603. "Sanford Hardcoating" process
0606. Q.C. limits for chloride in anodizing process
0608. Accelerated corrosion test for powder coated magnesium
0609. Problems with inconsistent adhesion between epoxy primer and topcoat
0612. Restoration of old model railroad track
0614. Electroplating nickel/cobalt and silicium deposit
0615. Looking for a source of Iridite
0617. Recovering gold by ion exchange
0619. E-copper as heat treat stop-off?
0620. Drying blind holes
0623. Etching aluminum for paint adhesion
0627. Effectiveness of chromate passivation
0628. Passivation of 400 series SST
0629. Anodizing high Copper and Silicon aluminum
0633. Reusable plugs to keep paint out of holes
0634. Pinhole contamination in white powder
0636. Preventing outgassing of anodized parts
0638. Nickel versus Tin plated wire
0639. Passivation of 303 stainless steel
0644. Porosity test for gold plating
0645. How to brass tint lead, zinc, and tin
0646. Looking for a very fast method to strip nickel from copper
0648. Information on Zinc Cobalt plating
0649. Clear coating for aluminum motorcycle engine parts
0652. Nickel-free plating of jewelry
0655. Will an Ampere Hour meter help with anodizing process?
0657. Measuring reflectivity of mirror polished stainless
0663. Vacuum Impregnation and Plating
0664. Chromate conversion coating on screwed & glued aluminum
0668. What is BLACK-T
0671. In need of a galvanic series chart
0672. Plating emission factors
0673. Anode and cathode distance for bright nickel plating
0674. Floating problem with waste treatment sludge
0676. Re-anodizing a cast aluminum sauce pan
0679. Wear resistant coating for A356 aluminum
0685. Microarc oxidation?
0686. Problem in platinum aluminide plating
0694. Structure of black chrome plating
0695. Making water-soluble photopolymer conductive
0696. Phosphorus content of EN coatings
0702. Zinc Chromate Paint Replacement
0703. Inhibitors for sulfuric acid anodizing
0706. Want equipment to chrome auto rims
0710. Wear coating for S-7 Tool Steel or stainless? TiN, TiCN, Armoloy TDC, QPQ?
0713. Chrome Plating Bumpers and Copper
0719. Stainless steel passivation methods and articles
0720. White rust on galvanized steel
0722. Parkerizing or phosphatizing kit
0723. Stone Guard or Stone Hard
0724. Picric Acid Replacements?
0730. Anodized a surface for electrical insulation
0732. Plating Brighteners without sulfur
0734. XRF coating thickness measurements-calibration
0740. Tin Pest/tin disease/tin whiskers
0746. Nitriding and carbonitriding
0747. Alodine drying procedures
0751. Oxidation of aluminium without electricity
0752. Chrome removal from motorcycle rims
0753. Electropolishing in "stacked" parts
0754. Paint booth lighting
0755. Tinting galvanized material
0757. Brass tarnish removal on an antique cash register
0760. questions about industrial hard chrome plating
0761. Pollution free Galvanization possible or not?
0762. Puma C12 Activator
0763. Gold plating on auto brand emblems
0764. Rainbow Passivation solution for zinc post treatment
0767. Seeking information about electropolishing stainless steel
0768. Nickel plating: electroless or not & what thickness?
0769. Brush plating of aluminum
0771b. Reclaiming precious metal from circuit boards, etc.
0772. Chrome plating embrittlement relief
0773. pH measurement
0775. Patina finish on big brass bands
0776. Galvanizing problem: high silicon steel
0778. More replies to passivation of stainless steel
0779. Removing tarnish on brass, copper, bronze
0779b. Ugly white patches on bronze statue
0779c. Remove tarnish on pennies, copper, and silver
0780. Cleaning oxidized 5086 aluminum plate
0782. Electrical conductivity values of oxidized Beryllium Copper
0783. Copper wire de-tinning
0786. Training Program Help Needed for Metal Polishing
0788. Zinc plating problem with surface inclusions
0790. Green patina on copper
0791. Seeking method for chem-film (Iridite) removal
0792. Stripping of Neodymium
0793. Need non-cyanide nickel strippers
0796. Hydrogen embrittlement
0797. Clear hard anodize coating--Reynolds?
0798. Painting/protecting brass elevator doors
0800. Polishing aluminum motorcycle rims
0801. Requesting assistance with paint adhesion on a galvanized surface
0803. Zinc plating problem: poor corrosion resistance
0805. Problem with anodize fading
0807. Powder coating and the automotive industry?
0808. Tin plating waste treatment
0809. Splash color anodize - how?
0811. Uses for lead acetate in plating
0812. Chrome plating of EDM wire
0816. Paint sludge recycle
0818. Lacquer designed to withstand a bake
0819. Silver Saxophone finish flaws
0821. Unintentional solder adhesion to Zinc & Yellow Chromated surfaces
0822. Conversion coatings on aluminum
0826. Aluminum-Scandium alloy baseball bats
0827. Finishing of model aircraft engines
0828. Chromate coating thickness vs. electrical resistance
0829. How to use bipolar auxiliary anodes
0830. Chrome Plating of Magnesium
0833. H&H (Handy & Harman) factor and Black Silver Plating
0834. Galvanneal is Off Gassing during powder coating
0835. Glycolic acid uses in metal finishing
0836. Poly OND or Poly ORD
0837. Looking for medical grade powder coating supplier
0838. Formulas for rust patinas
0839. Electropolishing of high Ni alloys (alloy 42)
0842. Can't find Versene "T" or Versene 220, for that matter
0843. Cyanide-free electroless Silver
0844. A nonmetallic is depositing during Electroless Nickel plating
0847. Coating thickness testing devices
0848. Copper Anode formulations, what's the difference?
0849. National fastener act
0850. Carbon anodes for electrogalvanising
0851. Hard clear coat for gold
0852. Difficult Electrolytic Nickel Plating of diffusion barrier
0853. Passivating Stainless Steel 416 Grade T
0854. Black oxide - cold method vs. hot method
0855. Electropolishing Bath Additives
0856. Level control for heated cleaning tanks
0858. Epoxy Polymer Concrete Aluminum Bond
0859. What's happening with ISO-14000?
0860. Electropolishing of semiconductor wafers
0861. Humidity failures on waterborne coatings for plastics
0862. Reliable Zinc Alloy Plating Sources?
0863. Citric acid passivation of stainless steel
0865. Cyanide-free brass electroplating formulation
0866. Surface finishing of low-friction surfaces
0867. Trivalent chrome thinness and staining
0868. Pits on ground electroless nickel plating
0871. Aluminum/epoxy adhesion problem
0873. Hard chrome plating thickness measurement
0874. Zinc phosphate as galvanic corrosion protection?
0878. How to get uniform electroless zincating on aluminium used in Si chips?
0880. Sierra Silver Spray Solution
0881. Corrosion Protection of zinc plating solution
0881a. White Rust / Wet Storage Stain on Chain Link Fence
0882. Hydrogen Embrittlement in Chromium Plating
0884. Mu metal plating, coating, and finishing
0885. Testing copper plating solution for copper & acid content
0886. Scratches and pits during electropolishing
0888. Copper deposition: How to get smooth heavy deposits
0889. Electropolishing of small nickel-titanium (nitinol) parts
0893. Converting cyanide-containing degreaser to non-cyanide
0896. UV-proof black anodizing
0897. Electropolishing nickel-titanium (Nitinol)
0902. Operating conditions for ruthenium plating and tungsten-nickel plating?
0903. Looking for Thermal Conductive Powder Coating
0905. Future of Hard Chrome Plating
0906. Need help with Silver plating and threaded Locknuts
0907. Zinc plating and black oxiding of powdered metal
0908. CARC-compliant Powder Coating
0909. Passivation with citric acid
0910. Drying parts spot-free
0911. Aluminium coating of polymers
0913. How to produce antique gold finish
0914. Need to prove Zinc Phosphate was removed by Grit Blast
0915. Options for disposal of soak cleaning solution
0916. Sensitizing and the Brashear process
0917 What is a DEFRIC finish? A type of nitriding?
0920. Color chart book for RAL standards
0921. Calculating explosion limits
0922. Woods Nickel Barrel plating of SST
0924. Edge effects in nickel sulfamate plating
0927. Process for plating onto Molybdenum
0929. Vendor/chemicals to apply Cu/Sn alloys--Albaloy process
0931. Alternatives to Chromium and Cadmium Plating
0932. Reducing Agent for Electroless Copper Deposition
0934. Coating for metallizing nonconductors
0934a. Making cotton rolls conductive
0935. Chrome Plating Tank Sizing
0937. Anodizing titanium alloys
0938. Need electropolish, passivation, of stainless steel
0939 Statistics on Black Oxide Emissions
0940. Benchmarking for QS9000
0941. What are the top five metals used for plating?
0943 Problem with Pickling Steel with 2.5% silicon
0945. E-coat manufacturers - Who are they?
0946. Anodizing questions for DIY
0947. Experiencing non-conductive Deposits on Expanded Metal Anodes.
0948. Industrial cleaning and lacquering of brass (in a machine center setting)
0950. Electroless Nickel on TUNGSTEN-CARBIDE and Tungsten-Titanium
0952. How do I activate heat treated Nickel
0954. Plating small car bits at home
0955. Aluminum (or Metallic) Coating for a diffractive surface
0956. Mechanical polishing of stainless steel
0957. Are impurities in cast Aluminum causing the corrosion
0958. Soldering problems with bright Tin Plate
0959. Young's modulus/tensile strength of powder coatings.
0960. Black zinc phosphate
0961. Quench Polish Quench process
0962. Anodizing of Stainless Steel
0964. Source For Anodize Dyes
0967. Anodizing plant capacity?
0968. Need introductory info on Powder Coating
0970. Metal finishing chemical process videos wanted
0971. Refining of Precious Metal
0975. Powder Paint Visible Emissions from Bake Oven Exhaust
0977. Plating of semiconductor leadframes
0981. Polishing titanium
0982. Gunsmith Bluing
0983. Looking for imitation gold plating
0984. Nickel Electropolishing
0985. Anodizing Aluminium to a stainless steel color
0985A. Looking for information on anodizing of titanium
0987. What is a jiggle Cell (a type of Hull Cell)
0988. How to strip Zinc-Nickel plating
0989. Cadmium Plating Replacements
0990. Chemically prepping aluminum/graphite (Al/Gr) composite material for plating
0991. Rust forms on inside of plated tubes
0993. Barrel Plating Fundamentals?
0994. Formula wanted for brightener for citric acid gold bath
0998. Red smut after bright dipping
0999. Artist needs help painting metal surfaces without preparation
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