Archives of the Hotline

Letters/threads 2000 to 2999

The 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.

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2002. Zinc Plating Appearance Problems
2003. Galvanic Couple Between Chem-filmed Aluminum and Gold
2004A. Recycling dry lime sludge
2006. Platinum embrittlement
2007. Plating facility design
2008. Metalworking Fluids Recycling
2009. Nickel plate ductility problems
2012. Electroless copper plating adhesion
2013. Anodize for Ice Maker Evaporator
2014. Aluminum alloys & corrosion
2015. Anodize or Alodine under powder coating on aluminum
2016. Identifying tags for zinc plated and powder coated work
2020. Inconel
2021. Electropolishing
2022. FDA approval for EN?
2024. Precipitating Nickel
2025. Oxidation on copper surface
2026. Powder coat gas bubbles on zinc plate steel
2028a. How to electropolish Nitinol for microstructure studies
2029. Chrome over Electroless Nickel Shafts Adhesion/CD problems
2030. Trouble with passivating 17-4 Stainless Steel
2031. Removal of tin from wastewater
2034. Max. operating temp.of zinc plating with chromate conversion
2036. Reclaiming Palladium Metal
2038. White Specking on Galvanneal Surfaces?
2041. Painting techniques and different types of antique metal painting
2043. Flux-less Solder-Copper Bond
2046. Yellow Chromate Finish Quality?
2047. Source for Nickel Free Plating Solution for Fashion Jewelry
2050. White/light anodizing on aluminum casting
2053. Hard Coating A380 die casting
2054. Zinc Plating - Advantages of different finishes
2055. Copper Adhesion on Copper
2057. Looking for cad. plating alternative
2060. Electrically conductive coatings for Mg die castings?
2061. Transparent Conductive Coating
2062. Adhesion between photo-resist (dry-film) and copper
2064. Rumor: chromate conversion coatings cause skin cancer?
2068. Protecting High Polish Magnesium
2069. Brass finishes
2070. Thin gold film on fiber optic cores
2071. Corrosion resistant coatings under Sea water and temperature exposure conditions
2073. Light reflecting aluminum coating on molded plastic parts
2075. HELP on Anodizing pretreatments
2076. Removing anodizing from aluminum
2077. Aluminum vs Stainless Steel cathodes for anodizing tank
2078. Bright dip chemicals attacking tank?
2079. Fishing Reels & Pitted Chrome: Refinishing Suggestions?
2080. Rust removal on antique gun
2084. Quality margins
2085. Bright-dip replacement?
2087. Sodium Chromate Tetrahydrate?
2088. Flash rust in wash tanks
2092. Zinc Dichromate
2093. Alkaline Cleaner for SS316L
2097. Magnetic Shielding Coatings
2099. Improving adhesion with a two step zincate
2100. Tarnishing brass
2101. Chromic Anodize Pitting Indications-2024 and Rack Stock
2102. Prepping Aluminum for good adhesion
2103. Need a company that can coat 316SS with black chrome?
2104. Nickel on chrome & zirconium
2108. Color case hardening steel
2111. Problems in cleaning brazed Copper product
2113. Do I need a primer on a galvanized steel pole?
2114. Cadmium Plating: Brightness = Embrittlement?
2117. Wastewater Treatment Operating Costs
2118. Infrared vs. Convection?
2119. Dip Tank for Hot Wax Application
2121. Gold Plating Solution Required
2122. Reflective Coating/Metallizing Materials
2123. Drag Finishing?
2128. Where to find "Metal Colouring" by Fishlock?
2130. Stripping Dry Film Lube from anodize
2131. "202 clear anodize"
2132. Formic acid (1%) as a pre-plate acid dip?
2135. Passivate vs: bisulfate
2136. Sandblasting galvanized steel
2138. Aluminum Finishes
2141. How to dispose of gold stripper
2142. English translation of Japanese Aluminum Anodization standards
2144. Need 18K electroforming information
2147. Black Chromium Plating
2148. El Ni plating bath liners?
2151. Bearing raceway finish
2152. Plating to a rotating cathode
2153. Immersion Tin on Aluminum
2154. Looking for anodizing schools
2156. Analysis lab with Atomic Absorption Spectroscopy Capability
2159. Tungsten Cobalt alloy
2161. How to tarnish or to dull bright brass
2162. Porous Hard Anodize
2168. Portable anodizing for plumbing fixtures
2169. Conductive coating and thick gold
2170. Coating measuring
2171. Passivation
2178. Energy efficient electroplating
2179. Comparison of Different Metal Coatings
2182. Students Need Urgent Help
2183. Steel mandrel etching out of aluminum
2184. HVLP gun range finders
2185. Looking for low gloss field applied exterior polyurethane
2189. Plating process info needed for school project
2190. Surface Treatment For Tungsten Copper Material
2191. Alumilite Finish Needed?
2192. MIDS - selective plating of polymers
2193. Coloring of stainless steel
2195. Nickel Sulphamate bath additive
2196. How to deposit copper uniformly
2197. Chromic vs. Sulfuric Anodize
2199. Difference between electroplating and anodizing?
2202. Inquiry for Anodize thickness measuring units
2203. High Mg 356 casting and aluminum anodizing
2204. Canadian company wanted for "bronzing" supplies
2205. Electroforming Magnetic materials
2206. Deburring small stainless and titanium parts
2207. Avoiding Orange Peel
2208. Alkaline Zinc-Nickel Adhesion to Hardened Steels
2212. Environmental Site Assessments
2214. Coating for zinc plate
2215. Cadmium Plate Thickness Control
2218. Sheet steel preparations for oil painting
2219. ASTM Specifications
2220. Basic primer on anodizing
2221. Water Quality
2222. Alkaline non-cyanide zinc problem
2223. Cobalt in gold deposits
2225. Appearance Standards
2228. Cyanide health problems
2231. Hydrogen Relief of Electroplated Partss
2233. Clear vs Yellow Chromate
2234. Protective Coatings
2236. Potassium gold cyanide
2237. Anodize vs chromate conversion
2240. Electropolishing tungsten
2241. Satin finish Hard Chrome
2242. Selective Gold Plating
2243. Electroplaters and Building Codes
2244. Non-cyanide based continuous wire plating
2246. Anti Oxidizing Anode
2248. Improved Drivability Needed!
2250a. How to blacken stainless steel parts
2251. Books for analytical methods for plating solution
2252. Teflon Coating on Aluminum
2253. Conductive coating for aluminum
2256. Black oxide finish
2257. Life of Nickel Sulfamate bath
2258. Electropolishing or chemical polishing of gold
2259. High Temp Adhesive
2260. Oxyseal Coating
2261. How to produce zinc sulfate
2262. Silver or gold coatings on glass
2265. Tough metallic coatings for nonmetallic composite panels
2269. Outsourcing of paint mixing operation
2271. Remove tarnish from shell casings
2273. Sulfonic acid
2276. Gold plating
2278. Strength Reduction from Zinc Plating
2279. Finding EN solution
2280. Vapor degreasing
2282. Woods Nickel Strike
2283. Anti-tarnish Brass Coating
2284. Vapor Degreaser Acid Inhibitor Needed
2286. Electroplating for injection molding
2287. Conductivity of zinc chromate coating
2294. Search for black plating process
2297. Waste Stream Cu Analysis
2299. Two stumpers
2301. Tempering after grinding for stress relief?
2303. Failure testing of nickel plating
2304. Ripple and nickel plating
2305. Cold sealing
2307. Color anodizing of die-cast aluminum
2308. What pre-alodine cleaners and deoxidizers are commonly used by the industry?
2309. Microcracks in hard chrome
2310. Conductive Coatings for Brass and Copper plating
2312. SnPb Plating - Carbon Treating
2316. High temp titanium oxidation prevention
2317. How to paint screw heads
2318. Electro-coagulation vs Ion Exchange?
2320. Stainless Steel colouring
2322. EN heat exchanger
2325. Polypropylene balls
2327. Durable brass plating - titanium process developed by NASA
2328. Carburetor linkage plating
2329. Tuffcoat electrolytic clearcoat
2330. Heating Zinc Ammonia Chloride (ZAC)
2332. Inert anode
2334. Adhesion testing of Thermal Sprayed Coatings
2335. Cerium plating?
2336. Cleaning stages prior to plating
2337. Cyanide Bronze Plate Bath Analysis Procedures
2338. Power supply for anodizing titanium
2339. Tin on Aluminium castings, an adhesion problem
2344. Electroplated copper
2346. Nickel Sulfamate appearance
2348. Market for used electropolishing acid
2351. Chrome stripping
2352. Chemical, UV, and High-Temperature Resistant Paint
2353. Removal of weld varnish
2354. Plating on Thyroplast 2316
2355. Thickness measurement
2356. Technical : Copper vs zinc-plated copper for hanging rods?
2357. How to dry zinc-base diecastings after plating?
2358. Do you operate cyanide-free alkaline copper process?
2360. Coil line equipment for aluminum printing plates
2361. New Aluminum Alodizing Chemicals Available
2362. Aging tarnishing brass
2363. Bad adhesion of hard chrome on stainless steel
2364. Cost benefit analysis of heat treating CRS to eliminate hydrogen embrittlement
2368. Powder coating on zinc die-castings - Adhesion problem
2369. Thin film anodizing
2374. Zinc enhancement
2375. Appearance of Mild Steel after Bead Blast and Black Zinc
2376. Activating salts for nickel
2377. Paint finish inspection
2378. Rust patinization
2380. Paint/powder stripping
2381. Question re: Boric Acid Determination in Ni Bath
2383. Color shift during sealing
2385. Smut on indium-silver
2387. Cyanide-free gold plating solutions
2388. Patination and protection
2389. Hazardous exposure in preparation?
2390. Phosphated Steel Finish Quality
2394. Making other materials look like stainless steel
2395. Electroplating Help
2396. Zinc Plating
2397. Internal powder coating application information
2401. Correlation between accelerated and natural weathering
2402. Is it possible to use Copper pennies as alloy for silver ?
2404. Galvanic action between Aluminum &Stainless Steel
2405. Using nickel anodes in a cadmium plating solution
2406. Problems in ammonia chloride zinc plating: Q&A's
2407. Infrared curing for powder coating of aluminium sections
2412. Immersion gold plating Q&A's
2413. Plating a Heat Spreader for very good adhesion of the die
2414. Masking material for cadmium plating
2415. Plating Polymers
2420. Jigs of anodizing process
2421. Safer etching of silver?
2425. Filtration of chrome solution
2426. Hard wearing coating of Aluminium
2427. Zinc Deposit on Anode Baskets
2429. Coating jewelry with lacquer
2430. Help with info about Krome King?
2431. Shiny Copper Forever?
2432. BA surface finish
2433. Clear Finishing Dilemma
2435. Manganese Phosphate Bath Heating and Sludge Control
2437. Carburetor finish removal
2444. Painting over electrogalvanized chromated steel
2447. Gold is too shiny: what do I do?
2448. Nickel Sulfamate Tank
2449. Effect of Heat on Gold-Nickel Plated Kovar
2450. Chrome Removal
2453. Neodymium-Ferrite-Boron Electroplating Technology
2454. What is gold potassium cyanide?
2456. Plating motorcycle parts at home
2459. Discoloration of Black Anodized Aluminum Parts
2460. Nickel-plating stainless
2461. Cloud-Chamber coating process
2462. Problem with stripping heavy copper plate after carburizing
2465. Nickel Plating Alternatives?
2469. Hard Anodizing MIC-6 Tooling Plate
2472. High temp powder coating pretreatment
2474. Need polypro tank advice
2475. New zinc electro plate line won't plate
2479. Chrome paint
2480. Is chrome plating best for us?
2481. Wanting information about "Low Volume" Anodising plant & equipment
2483. Rubber metal bonding
2487. Electroless Nickel
2489. Looking for a Spec on Black Electrophoretic Coating
2492. Science student in need of help! what IS the purpose of ethylene glycol?
2495. Application ideas for conductive, solderable polymer coating?
2496. Prevention of corrosion in steam boiler systems
2498. Acid copper onto steel?
2499. Chrome plating of steel mill work rolls and also EDT texturing
2501. Chrome repair of undersize parts
2503. Selective Nickel to Nichrome etch
2504. Desperate search
2505. Have you heard of Pai-Kor's Plaforization product?
2507. Brass Plating on MS & Aluminium?
2510. Painting & Silk Screening on Bare Aluminum
2511. Bead blasted stainless rusting?
2513. Copper jewelry
2515. Anodizing on dye cast aluminium
2517. Looking for Metal Filled Epoxies
2518. How to improve friction of steel on ice
2519. Coating for a mold used for polyurethane foam
2521. How bad is Chromate?
2522. Hardness of Nickel Plating?
2524. European Surface Finishes
2525. Looking for Manufacturer quote Zinc line
2526. In search of copper patinas
2527. Electro Chemical Buffing
2528. Iron Phosphate VS Conversion Coatings on aluminum
2530. Etching Aluminium
2531. Steel Artwork
2532. Electropolish Q's
2534. Nickel Plating Stress relief
2536. Accounting Program
2538. What are the physical properties of Steel 316L?
2540. Where can I find this book?
2542. Corrosion Comparison chart
2550. Salt spray / Environmental test chamber parts, calibration, & service
2551. Question about phosphate coating
2552. Aluminium anodised name plates
2553. Chromating magnesium racing wheels
2555. Flaky anodize
2556. Looking for form for supplier audit
2557. Rust removal from car chassis
2561. Hydrogen embrittlement baking cycles
2563. Hot Dipped Galvanizing vs Zinc Plating
2564. Looking for polishing prep methods to provide smooth hard coat on 6061-T6
2566. Help to get started silver plating
2567. Anodizing remover
2569. E M I Powder (electro magnetic inductance powder)
2572. Automated Polishing of Stellite
2574. Diversey process v. electropolishing?
2575. Titanium Racks in Chromic Acid Anodize
2576. Methods for pH measurement in D.I. water
2577. Indium Plating of Copper
2579. Waste treating nitric acid nickel strips
2580. Waste disposal of Acid Copper solution
2582. Masking for chrome
2584. Copper Analysis
2585. Zn electroplating student project
2586. Can you make your own chrome stripper and nickel activator?
2589. EN onto nylon or plastic
2591. Determining HF concentration in Nitric acid baths
2593. Porous Pots
2600. Chromic acid problem
2602. Carbonate Refrigeration Equipment
2603. Powder Coating Sheet Metal Screws
2604. Passivation Standards
2606. Rust finish
2607. Powder coating galvanized steel
2609. Copper/brass tarnish removal and protective coating
2611. Interference Colour Anodizing
2614. Stainless steel sink scratches
2617. Wear resistant coating for nickel
2618. Polishing beryllium spheres
2619. Chrome Plating Plastic Parts
2621. New anodize line questions
2622. Copper sulphate question
2623. Loose contaminants in Tin Plating
2626. Lead plating or coating of brass electrical connectors
2627. Aluminum Desmutting Solutions
2629. Electropolishing stainless castings
2630. Surface Area Calculation
2631. Electropolish racking problem
2632. Handling cadmium plated parts
2637. HELP:Industrial Applications of Electroplating
2638. Cheap alternatives to Chromate post-treatment
2639. Electroless tin
2640. Air emissions from cadmium electroplating
2642. Vibratory Plating
2643. Need general and technical Plating information
2647. Calculating Cooling Requirements for Aluminum Anodizing
2649. Nickel plating stainless steel tubing
2650. Help on a Science Project
2652. Aluminum alloy composition and structure
2653. Removing/Stripping Electroless Nickel Plating from Steel
2654. Home anodizing. Myth or reality?
2656. Lacquer problems
2657. Peptone and Tin Plating?
2658. SPC Book for beginners
2659. Ni plating- Carbon Substrate
2660. Micromask
2661. Electroless and sulfamate nickel plating problems
2662. Heat coloring Copper
2666. Black anodize on 380 die castings
2669. Coating Selection for Ti Alloy
2671. Agitators
2673. Conductivity of zinc-chromate electroplating materials
2674. Rinse Dilemma
2675. Tungsten carbide plating
2680. Failure of Hardcoat Film
2681. How do you remove Zn from Ni Sulfamate Bath?
2682. Rh sulphate
2684. Removing electroless Ni from steel
2685. Potassium Hydroxide as Thru-hole Activator
2686. Citric acid for copper passivation?
2688. Plating Racks
2691. Aluminum anodizing technique
2692. help with bluing brass
2695. Process Control of Solutions
2696. Electroplating of Alloys by Abner Brenner
2697. Blacking of metals - steel and cast iron
2698. Need research info re: zinc on car bodies
2699. Activation of Japan steel
2702. Electroplating finishing facility for urban hydroponics gardening
2704. Yellow patches in silver plating
2705. RMS finish requirement
2712. Cyanide removal from electroplating wastewater
2713. Iridescent zinc plating without hex-chrome
2714. Spec QQ-Z-235
2723. Nikasil plating on motorcycle cylinders
2724. Plate nickel on aluminum
2725. Latest of powder coating (in Spanish)
2726. Improve Booth
2727. 99 HARLEY
2728. Soldering nickel titanium wire?
2731. Gold Plated Glass windows
2732. Determination of T.D.S. in water
2733. Deionized water
2734. Information Needed For Type III Hard Clear Anodize!
2736. Magnetic abrasive powder
2738. Stainless Steel Refinishing
2740. Measuring surface reflectance
2742. Need to measure 16,000 Amps DC
2743. Continuous electrocoating system
2745. Phosphate coated steel after excessive temperature exposure
2748. Recoating Hot-dip Galvanized Coil
2749. nickel plating?
2750. Information on recovering acetone
2751. Replacement of trichloroethylene in ellipsometers
2752. Nickel Activation
2754. Old HVWM Co. stuff
2755. Metallised membranes
2758. Anodizing appearance variations
2761. Yellow zinc plating with different appearance
2762. Nickel Plate Repair
2767. How to coat nitrided parts for 600-hour salt spray resistance
2769. Stainless Steel Rust?
2772. Re-Anodizing or Epoxy Paint?
2774. Tin over S.S.
2776. Is Hard Anodizing More Difficult?
2777. Plating tank cover design
2778. Spring Breaking After Zinc Plating
2779. Tribo vs Super corona equipment
2781. Copper plating on Carbon?
2782. Stripping Gold and Nickel from Copper
2784. Spot welding smut
2786. Tin Plating
2788. What is a 400 grit finish?
2789. Nickel plating wooden figurines
2790. The right maskant
2791. Copper-solder cleaning
2793. Chromating Aluminum A-360 alloy
2794. Optimum coating weight for chromate conversion
2795. Black finish on Aluminium
2797. Nickel Strike
2799. Silver Plating Plastic
2801. CP Ti etch maskant
2802. Filtering solutions
2807. Aluminum and chlorine
2811. Polishing a titanium bicycle frame
2814. Thermographic Inspection in welded workpieces
2815. Silver on glass
2816. What is 'bright plating'?
2819. Pt over Tungsten?
2820. References Information on P2Etch Process and Alodine Process
2825. Cu-Ag grain boundary etch
2826. Plastic armor finish?
2827. Copper - steel separation
2828. Rose Gold
2832. Hard Anodize
2836. Need bright dipping info
2838. Polishing Soft, Low-Temp Alloys?
2842. Reasons for Anode Polarization
2844. Student Question: Uses of boric acid, fluorine, and barium sulfide
2845. Forming quality feather edges-burrs in metals
2846. Waste treatment in zinc plating
2847. Sprinkler Head Protection
2848. Osmium & Iridium Electroplating
2850. Protection for outdoor sculpture with rust and patinas
2851. Silver flaking from E.N.
2852. Sludge Dryer
2855. Delrin Surface Finishingg
2856. Need info about the electroless copper plating bath
2857. Need Parkerizing instructions
2858. Nikasil Plating, how is it done and what is it?
2860. Patina Copper
2862. JS500 vs E-coating
2865. Surface Tension Testing
2867. Penny Science Project
2869. home plater, what's the prob?
2870. PVD
2872. Chemical Removal of Braze Alloy
2877. Maximum Hardness of Hard Chromium plating
2879. Dendritic growths during Cu plating
2881. Stress in nickel sulfamate
2882. Evaluation of strip solution life
2883. Safety of anodizing titanium
2884. Aluminum pool ladder
2886. Tin plating of cookware standard
2890. Inquiring for the yield strength of electroplated nickel
2891. EN plating of zinc diecast - Stripping
2896. Polishing Titanium; Pretreatment
2897. Question About Vertical Anodizing
2898. Factors affecting the as-deposited hardness of EN-P
2899. Copper Whiskers during Copper Electroplating
2903. Uneven weight loss in etching
2904. Address for Manufacturer-Service Center for Isoscope
2906. Plating external threads
2907. Alloy Electroplating
2911. HELP! Painting on nickel electroless
2912. Require Molybdenum Solubility Data
2914. Chlorine, aluminum, & cold fusion
2917. Info on Cobalt-Zinc or Cobalt-Nickel alloy plating
2918. Activation of Hard Nickel Alloy
2919. Evaporation rates for waste electropolishing solutions
2920. Bright Aluminum or Silver plating
2921. Electrograining
2922. Wet Coat Paint or Powder coating to Zinc plating / yellow chromate finish
2924. Gold Plating Adhesion on bending part
2926. Copper coating of plastic foils
2927. Brass plating with palladium
2930. Brown stain in nickel plating
2931. Nickel Bronze flatware tarnish
2932. Brass plate 800 lb bell?
2934. Plating on plastic
2938. Nickel Sulphamate Passivation and additives
2939. Alodine Pencil?
2941. Electroless Palladium Plating Bath
2943. Problem - Nickel Acetate Seal Producing a film on Black Anodize
2944. What is joncoat?
2945. Nikasil on plastics
2947. IVD Peel Strength
2948. I need help with a masking problem
2950. Need to Calibrate Udylite PC-10 Hull Cell Rectifier
2952. Heat-anodizing of titanium
2956. Passivation procedure for Electroless Nickel
2959. Stainless steel grill top
2960. Aging Galvanized Sheet Metal Products
2961. De-bonding problems with metallized PVC film
2962. Grey Dull Surface Coating On Aluminum
2963. Electropolishing stainless steel
2964. Woods nickel strike ?
2967. Chromate conversion coloring
2968. Electroless copper bath stability questions
2969. Wrinkle finishing
2970. Rhodium Electroplating
2972. Electropolishing of pure metals
2973. Black coating stainless?
2974. Long term effects of cadmium plated steel wire?
2976. Dryer needed for passivated SS parts over 5" long
2977. Hot Melt Vinyl Plastisol
2980. Zinc cobalt plating vs. Galvanizing
2982. Good Reference Books for Electroplating
2984. Electrolytic etching of titanium
2986. Bright Dipping of Brass
2988. Electrically conductive black finish for steel?
2990. Wrinkle Black Powder Coat
2991. Home Powder coating Gun-Powders for DIY Small Projects?
2992. Sherardising
2994. Reworking a chromated & painted part?
2996. Strontium electroplating?
2997. Hot Rolled vs Cold Rolled
2998. Hot tin-lead dip
2999. War medals are tarnishing

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