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Preparation: | 1a. Mechanical Prep | 1b. Pretreatments | |||
Inorganic Finishing: | |||||
Organic Finishing: | 3b. Powder Coating | ||||
Post-treatments: | |||||
Supporting Issues: | |||||
Non-industrial: | |||||
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0. CORROSION, COMPATIBILITY, CHOOSING A FINISH . . .
58238. Good way to harden forming mandrels? [Canada] (February 2)58242. GI sheet vs. CRCA for rust prevention [India] (February 1)
58230. Bolts for aluminum brackets - SS or Galvanized? [St. Thomas, U.S. Virgin Islands] new (January 31)
58195. Aqua-regia Process Loss [Thailand] (January 31)
58213. Increasing cutting tool life by teflon impregnation [California] (January 30)
49696. Rolled Steel Countertop has become a mess (January 27)
58175. Selecting type of plating for BBQ charcoal basket [California] (January 25)
58176. ABS vs Acetal gears [Pennsylvania] (January 25)
58203. RoHS Compliant Thermal Barrier [California] new (January 19)
58202. Galvanic corrosion: Zinc-Nickel plated steel in contact with copper [India] (January 19)
58186. What type of plating or passivation process for 300 hours salt spray resistance? [India] (January 17)
58181. Alternative to Nickel Plating for pump seal wear resistance [Michigan] (January 13)
58158. Stainless steel coating/colouring [South Africa]
(January 11)58156. Protection of stainless on a construction site [Ireland] new (January 6)
58125. Want stainless water bottles to look like anodized aluminum [California]
(January 2)58061. Stainless Steel: which is more important, surface finish or grade? [Ireland] (December 28)
58116. Aluminized spray to correct undersized parts [India] (December 22)
58043. Corrosion protection of soft aluminum tube in 44% salt water concentration?? [Wisconsin] (December 19)
58095. How will Sulfamic Acid affect Stainless Steel, Ductile Iron and Carbon Graphite? [Michigan] (December 16)
58074. Spring Steel Coloring and Rust Prevention [California] new (December 8)
1. PREPARATION . . .
| i |
1a. MECHANICAL PREP |
58237. How much metal must be removed to achieve a given Ra value? [England] (February 2)
58211. Fine polishing, mirror finish with automatic grinder/polisher [United Kingdom]
(February 1)50341. What is Sweep blasting? new (January 27)
12526. Swedish standard SA 2.5, SA 3 for sand blasting for cast iron part (January 25)
58174. What makes dry tumbling media break down faster than usual? [California] (January 19)
58080. How best to replicate brushed steel [Canada] (January 17)
56492. 30 RA to Microns new (January 13)
58081. How to drill EN7 AISI 100: carbide drill bits break [India] (December 28)
5396. Ra Surface finish (December 20)
58060. Cylindrical grinding down to mirror finish [Israel] new (December 5)
| i |
1b. PRETREATMENTS |
58124. Black traces on electropolished parts at jigging area [India] (February 1)
58194. Electropolishing parameters for maximum burr removal with minimal stock removal [Ireland] (February 1)
47202. Cleaning of 304 SST Hypotube
(January 27)32700. Boilers chemical cleaning circulation with Nitrogen [new (January 27)
58212. Electropolishing Zirc-2 for nuclear applications - sulfur contamination question [Virginia] new (January 25)
58193. Brass staining (probably due to cleaners and lubricants) [South Africa] (January 24)
31237. Rust prevention of iron metal parts in high humidity storage in open air (January 17)
23742. Black Oxide versus Black Phosphate (January 17)
58180. White 'dusting' on nitric acid passivated 304L parts [Colorado] (January 16)
58173. Removing ink from ABS plastic [Florida] new (January 16)
58025. Best method to remove buffing compound [Colombia] (January 6)
26380. Etch acid for Inconel 718 and 903 new (December 29)
58102. Effect on Electropolish of carbon content in 304 stainless [California] (December 26)
58079. Acid degreaser formulation [India] (December 9)
58052. Suggestion Required - Stainless Steel Electropolish [India]
new (December 2)| i |
1c. MASKING, RACKING, TAPING, PLUGGING, PHOTOSENSITIVE MASKS |
58151. Racking for anodizing of flat aluminum sheets[Rhode Island] (January 24)
58078. Diamonds acquire black haze from masking for rhodium plating [India] (December 28)
2. INORGANIC FINISHING PROCESSES . . .
| i |
2a. ANODIZING AND LIGHT METAL TREATMENTS |
58046. Chromic acid anodizing of Al7075 T7351 [Israel] (February 3)
58229. Blackening aluminum without paint [Colorado] (February 2)
3738. Trouble Clear anodizing 6061 (January 30)
58214. Anodizing aluminum wire for insulation [Minnesota] (January 26)
4424. Anodized titanium, strength and fatigue effect new (January 25)
12979. Magnesium electropolishing and annealing new (January 25)
58197. Machining an anodized coated piece of aluminum [Massachusetts] new (January 19)
52363. Blisters on Anodized 7075 (January 19)
58192. White lines after Hardcoat Anodizing [Michigan] (January 19)
58191. HAE Post-Treatment Dip [Pennsylvania] new (January 18)
58150. Sulphuric Acid Consumption in Hard Anodizing [India] (January 18)
58172. Heat treat 6061 T6 for grain structure [Washington]new (January 12)
58149. Chromic Anodize Analysis Conundrum [Georgia] (January 9)
58143. Caustic Etch / Deox Versus Tri-Acid Etch [California] (January 9)
58154. Corrosion Resistance of Hardcoat Aluminum with Hot Water Seal [Rhode Island] new (January 6)
58117. Thumbrule for checking sulphuric acid conductivity during anodising by its color or appearance [India] (December 22)
58115. Difference between Mil-s-A8625 Type II Class 2, and BiFluoride etch Alum Anodize [California] (December 22)
58118. Wash Primer and Mil-C-5541 [Texas] (December 21)
58058. Polyolester lubricant and anodized finishes [California] (December 6)
58059. Can Alodine 1200 be used for Condenser coils? [Wisconsin] new (December 5)
| i |
2b. ELECTROPLATING and ELECTROFORMING |
57861. Hard chrome plating of zinc based metal (February 3)
55379. Chrome plated stainless steel for high temperature valves? new (February 3)
58227. Copper anode consumption [India] (February 3)
58219. Can't get chrome plating to adhere to sandblasted copper [India] (February 2)
46662. Prepping beryllium nickel for plating new (February 2)
58244. Inconsistent appearance of zinc plated with black chromate parts [Illinois]
new (February 1)58236. Chromium contamination limit in Cyanide Gold Bath [Arkansas] new (February 1)
36007. STEP test problem in Duplex Ni Plating Plant (February 1)
58228. Why must mild steel be dull coppered? [India] (January 31)
49547. Carbon treatment of copper plating bath (January 31)
58086. Watts nickel barrel comes out completely black [Colombia] (January 30)
43916. Cyanide spots and stains in brass plating (January 30)
43260. Roughness in Nickel Deposit (January 30)
58220. How to plate copper-phosphorus alloy onto copper? [Ohio] new (January 27)
2626. Lead plating or coating of brass electrical connectors (January 26)
44983. Alkaline Tin Bismuth Plating new (January 25)
58199. Hard chrome won't plate [Iran] (January 24)
43776. Silver Blistering Mechanism new (January 19)
58200. Zinc-Nickel Brush Plate Solution [Illinois] new (January 19)
58179. Durable matte black plating for an already plated cast Aluminum D-Sub connector shell [California] (January 18)
58141. Excessive thickness variations when hard chroming with old plating solutions [China] (January 17)
55391. Black sludge in nickel anode baskets (January 12)
58109. Zinc plating lasted only 5 years [India] (January 9)
58084. Hydrogen De-embrittlement after hard chrome plating [India] (January 9)
58153. Low chrome deposit [California] (January 9)
45934. Nickel-tin plating: Tin blistering at 222 deg C/
new (January 6)58148. Fume Suppressant for Chromic Acid Help and Tensiometer Advice [Maryland] (January 6)
26571. Inconsistent & Variable Copper Plating Hardness (January 6)
25859. What chemical is used to lower pH of copper pyrophosphate bath (January 2)
58142. Using lead to repair dents in copper before gold plating [France] (January 2)
44804. Preventing Reddish Gold after Plating (December 28)
57984. Black stains when air agitation is used in nickel sulfamate plating [Mexico] (December 28)
58101. Need Cooking Surface plated with Nickel vs. Chrome question [Rhode Island] (December 28)
58123. Tin plated copper wire 'dusts' when drawn [India] (December 28)
37360. Hard chrome 316 stainless steel (December 24)
41663. Conductivity or resistivity of Blue Chromate finishes new (December 22)
11898. Hard Chrome Plating on Cast Irons containing Graphite new (December 22)
58040. Preventing immersion deposition of copper on steel tubing [Sri Lanka] (December 20)
58100. Difference between LHE Cad vs. Ti cad [USA] new (December 19)
58087. How to get matte deposit from acid zinc bath [Denmark] (December 19)
58110. Rhodium Plated electrical contacts get spots (burns?) [Oregon] new (December 16)
58107. Bronze plating problems with O6 Tool Steel [California]
new (December 16)58051. A36 steel requires a high quality matte chrome finish [New Jersey] (December 16)
25000. Help on pink gold plating new (December 14)
58066. Plater dull nickel plates heat sinks; customer wants bright [Pennsylvania]
(December 9)27057. Thin Dense Chrome Plate vs Chrome Plate new (December 8)
58073. A co-worker is skipping process steps and maybe making dangerous parts [Canada] (December 8)
58039. Dull cadmium plating bath has started giving unwanted brightness [California] (December 7)
58057. Copper undercoating before nickel plating [India] (December 5)
58056. Outside diameter are undersized after plating. [Malaysia] (December 5)
58042. Mostly white rust spots (some red) on "fresh" zinc plated 1215 steel parts [California]
(December 2)40558. Poor adhesion in plating onto titanium new (December 1)
| i |
2c. ELECTROLESS PLATING, PLATING ON PLASTICS, IMMERSION PLATING |
58235. Clear cadmium over Electroless Nickel blisters at masked thread holes [California] new (February 1)
58221. Electroless nickel produces dusty finish; Bright copper deposit is rough [South Africa] (January 27)
58215. Will plated ABS be watertight? [Texas] new (January 25)
58196. How to do NiB electroless plating on top of NiP electroless nickel plating [Turkey] (January 25)
11290. Difference between Nickel plating and Electroless Nickel plating new (January 17)
58165. How to tarnish or "age" new electroless nickel plating [Florida]
(January 12)58111. Backside of wafers are dielectric but still become Electroless Nickel plated [Idaho] (December 22)
57786. Electroless Nickel Plating Issues [Mississippi]
(December 20)58093. Anomaly in Electroless Nickel Plating [Alabama]
(December 16)57921. Two Part Silver is Discolored [California] (December 12)
57992. Conductive paint for Plastic plating [Vietnam] (December 7)
| i |
2d. PVD, CVD, ION IMPLANTATION, VACUUM PROCESSES |
58206. Polyester based high-gloss coil coating is too rough [Saudi Arabia] (January 26)
58147. Coating aluminium on glass beads by PVD process [India] (January 13)
38060. Sputtering bismuth onto piezo transducers and aluminum foil new (January 12)
57954. Vacuum Metalizing Plastics With Silver [Kansas] (January 2)
| i |
2e. GALVANIZING, ALUMINIZING, HOT TIN DIPPING |
58234. Surface of hot dip galvanizing bath is "creamy" [Brazil] (February 3)
58163. Aluminium vs Galvalume roofing [India] (February 3)
41571. Zinc Ash / Zinc Waste in Hot-dip Galvanizing (February 3)
58226. How to do our first melt in new galvanising kettle [South Africa] (February 2)
58065. Safely emptying the galvanizing kettle (February 2)
58164. Must galvanized hydrant pipes be painted before burying? [Saudi Arabia] (January 12)
49271. How to remove ferric chloride in flux solution [Iran] (January 6)
58139. Dross & lead on galvanizing kettle floor [Brazil] (January 2)
29835. Galvanizing 101: galvanized vs. hot-dipped galvanized (December 20)
58055. What happens to acid trapped in pipe before galvanizing [UAE] (December 12)
58064. How to recognize electrogalvanized vs. hot dipped steel? [Hong Kong] (December 9)
| i |
2f. BLACK OXIDE, BLUING, COLORING, PATINATING |
1150. The black oxide process new (January 25)
58185. Is Black oxide NSF approved? [Vermont] (January 17)
58063. Black Oxide Needs 24-hour Salt Spray Resistance [Mississippi] (January 6)
58135. Differences between black oxide and phosphating processes [India] (December 26)
| i |
2g. OTHER INORGANIC FINISHING PROCESSES |
58233. Dacromet high strength bolts in contact with green concrete [India] new (February 1)
12141. Ion vs. Gas nitriding of H13 Tool Steel new (January 31)
58171. Anomalous defects on nitrided parts [Italy]
(January 17)24520. Anodizing of stainless steel
(January 11) 3. ORGANIC FINISHING PROCESSES . . .
| i |
3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS |
57695. Immersion Primer before powder [Iowa] (February 1)
57561. Pin holes on e-coat bottom surface [Malaysia]
(February 1)23620. Benefits of powder coating over e-coating (January 26)
| i |
3b. POWDER COATING |
58225. Powder coating over zinc plating [India] (February 2)
57223. Powder coating machined cast iron: gassing problem new (February 2)
58170. Tapping issue with powder paint [Canada] (February 1)
58085. Powdercoat Questions left unanswered in 2011 [Australia] (February 1)
58157. Food grade powder coating [Oregon] (January 30)
58049. Powder coating adhesion failure after nanotechnology pretreatment [Turkey] (January 16)
58134. Electrostatic relationships in powder coating [Minnesota] (January 11)
58050. Powder coating finishes: textured, structured, plain [India] (January 6)
| i |
3c. LACQUERS, CLEAR COATS, ELECTROPHORETIC TINTING, ANTI-TARNISH |
57572. E-coating a carbon steel candle holder for outdoor use [China] (August 24)
57474. Electrocoating (E-Coat) Die Cast Aluminum - Safety & Surface Finish of End Product [Florida] (August 4)
| i |
3d. PAINTING, ADHESIVES AND OTHER ORGANIC COATINGS |
1318. How to paint aluminum new (January 31)
58038. What is the tolerance when a DFT is specified? [Bahrain] (December 26)
57863. Primer failed dry tape adhesion test [China] (December 24)
58122. Spin Coater for UV Curable Coating on Polycarbonate [Arizona] new (December 22)
4. POST-TREATMENTS
| i |
4a. CHEMICAL POST-TREATMENTS |
58169. Finish/Coating for Brass coated steel [Massachusetts] (January 13)
35018. Need a chromated Anti tarnish treatment for Silver plated parts (January 9)
| i |
4b. BAKING AND NON-CHEMICAL POST-TREATMENTS: |
58088. Passivate / Hydrogen Embrittlement [Tennessee] (January 11)
10948. Heat treat scale inhibiting coating for stainless steelsnew (December 15)
58037. Re-plating parts that have holidays [Michigan] (December 1)
| i |
4c. STRIPPING, REWORKS, ETC. |
11499. Removing TiN (titanium Nitride) coatingnew (January 17)
58146. Pitting of aluminum parts when stripping and rechroming bores [Illinois] (January 6)
57707. Stripping of Zi/Ni alloy plating and replating of the same - Regards [India] (December 19)
5. SUPPORTING ISSUES
| i |
5a. ANALYSIS, LAB TECHNIQUE, Q.A. |
11434. Copper plating solution analysis (February 3)
58121. Corrosion resistance tests for AMS2700 passivated stainless [Israel] (January 27)
18002. Hard Chrome Plating Bond Strength and Testing Methods For Itnew (January 12)
58168. Best Practice on drying Specimen after Salt Spray Testing [Australia] new (January 12)
58155. How to measure the thickness of Copper Strike on Copper? [China] new (January 6)
58133. How to check the chromate content in dichromate solution [Pakistan] (January 6)
58138. Black spots on zinc plating during salt spray test [Pakistan] new (December 29)
51596. Interpretation on EDX spectrum result (December 28)
29799. Chromic Acid Anodization process control (December 24)
52946. Analysis of FeCl3, HCl and HNO3 in etch solution (December 20)
| i |
5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL |
26494. Amount of Sulfur Dioxide Generated by Sodium Metabisulfite in Acidic Solutions new (February 3)
58241. Water contaminated with Paint Stripper [Florida] (February 3)
58240. Chrome & paint Effluent Treatment [India] new (February 1)
58209. Evaporation for plating waste water [Texas] (January 26)
39112. How to clean filter press effectively? (January 25)
58106. Ferric Chloride use in waste treatment [North Carolina] (December 26)
57996. Ways to untangle effluent treatment system mess [India] (December 9)
| i |
5c. SAFETY ISSUES, EMISSIONS, TOXICITY |
58224. Chrome Remover Agents [India] new (January 31)
58105. Is diffused nickel-cadmium plating a hazardous material [California] (December 19)
57899. Risk of Handling and Cleaning Cadmium Plated Components [United Kingdom] (October 31)
| i |
5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION |
58092. Can we use a titanium heater in a solution of 120° C. phosphoric acid [Colombia] (January 31)
58137. What is suitable to store Nitric Acid? Is it advisable to store it in SS316? [India] (January 25)
32578. Hard chrome fume suppressants and other misting measures (January 6)
58045. Spill Kits for plating shops? [Georgia] (December 28)
| i |
5e. QUESTIONS ABOUT SOFTWARE, SPECS, BOOKS, INDUSTRY STATISTICS, ETC. |
58245. Anodizing Process Risk Management [Florida] new (February 3)
30073. What is Spec. 57-0-2 Type II new (January 27)
16735. Zinc plating process qualification new (January 17)
191. Pull-test / coating adhesion test ISO 4624 new (January 13)
58072. IMDS ID for CED coating? [India] new (December 8)
| i |
5f. WORLD WIDE WORD OF THE WEEK |
58218. Yellow chromate and yellow passivate the same? [New Jersey] (January 27)
58048. What does Passivate "Condition B" mean? [Oregon] (January 6)
58094. ASTM, NACE or SSPS standard for allowed amount of rust on new steel [Colombia] new (December 13)
58062. What is "eloxadize" finish? [China] (December 6)
58054. Anodized finish: Saturn silver glossy [India] (December 5)
| i |
5g. CHROMATE REPLACEMENT & THE EUROPEAN END-OF-LIFE DIRECTIVE; Cd, Ni, Pb, Cr REPLACEMENTS. |
58198. Hexavalent chrome product replacements (Meets MIL-C-5541 Class 1A) [Chile] (January 24)
58167. Welding issue on copper metal with dull nickel plating and tin plating [India] (January 13)
57834. Trivalent Yellow Chromate [Pennsylvania] (January 9)
58022. Does Mil-DTL-5541, type II class 1 A imply trivalent chromate? [Michigan] (January 6)
47049. Please explain theory of trivalent passivation new (January 4)
57849. Hexavalent Chromium in Trivalent Passivating Baths? [Michigan] (December 19)
| i |
5h. MOSTLY METALLURGY |
58099. Weld Hasteloy c276 to 304 stainless steel? [England] new (December 15)
58077. How is Cyanide Hardening process done? [Pakistan] new (December 9)
44093. Etching of Forged Cobalt-Chromium-Molybdenum Alloy new (December 8)
58071. What type of steel is Nickel-free and Lead-free? [India] new (December 8)
58070. Fixing oxidation of stent after vacuum failed in annealing [India] (December 8)
48581. Welding Corten Steel new (December 5)
| i |
6a. ARTISTS, HOBBYISTS, CAR BUFFS, HOME OWNERS, ETC. |
58248. Is this just tarnish -- or a strange finish? [Pennsylvania]
new (February 3)58232. Bluing coming off my Rueger [South Carolina] (February 1)
58136. My silver is now a copper color from soaking it in ammonia [Maryland] (January 31)
58217. Copper paint for heat control [USA] (January 27)
58216. Will polished copper retain luster at 1500° F? Gold plated? Chrome Plated? [Egypt] new (January 27)
12877. Chrome vs stainless steel new (January 26)
58207. Coating brass bullets and casings to prevent tarnishing [Florida] (January 25)
28788. 14K gold electroplated stainless steel ring too yellow (January 19)
58190. Plating automotive bearing shells to increase outside diameter by .0005" [Missouri] (January 19)
58160. Care of GAB GENSE 18/10 cookware that I recently inherited [Illinois] (January 17)
58184. Stainless steel BBQ grills: is 304 or 420 better? [Connecticut] (January 17)
58007. Automotive cad re-plating is too grainy [California] (January 16)
58166. Electro cleaning vs. electro polishing of gold jewellery [India] new (January 12)
58159. Cleaning aluminium castings and carbs on Honda CB500/4 [New Zealand] (January 11)
58162. Recoating or restoring silver coating on antique glassware [California] (January 11)
58161. How to repeatably darken pennies across the whole spectrum from bright to black for art project? [California] new (January 10)
17375. Heat resistant clear coat paint new (January 10)
58140. How to remove new silverplating from old pewter? [North Carolina] (January 9)
18471. Immersion gold plating vs electroless gold plating (January 6)
58145. Chrome plating - anode slurry [Florida] (January 6)
5335. Black Anodized Aluminum Parts change color
new (January 2)58120. Is there a 'strike table' for what platings can be done on what substrates? [Florida] (January 2)
58129. Continuous cooling of acid bath for anodising aluminium [India] (January 2)
58098. How to recover Silver from silicone rubber containing silver [India] (December 28)
58130. Cost and durability of nickel plating versus chrome plating [California] (December 28)
58131. Cadmium plating attempts lead to black smut [Montana] (December 28)
58132. Removal of Artificial (dark/black) patina from antique belt buckle [South Carolina]
new (December 26)58108. Silver plated brass electrical contacts are fouling [Korea] (December 22)
58029. Identifying the materials in a fire screen [Australia]
(December 22)58015. How to repair a Waterford sleigh ornament [Texas] (December 22)
58114. How to make steel look like oil rubbed bronze? [Washington] (December 22)
58113. Brass and nickel plating pendants [South Africa] (December 22)
58104. 24k gold plating for I-PHONE 4 [Saudi Arabia] (December 16)
58091. What is the most lubricious and durable finish for my GLOCK? [Idaho] (December 16)
58075. Best corrosion protection method for steel automotive parts [Virginia] (December 16)
58083. Are all metals food safe? [Michigan] (December 9)
58076. Cleaning acrylic for better electroless deposition [Missouri] new (December 8)
58069. Gold plating Alloy 625 without peeling [Belgium] (December 8)
58068. Dissolving Nickel while leaving Copper Unaffected? [Nevada] new (December 8)
| i |
6b. RESEARCH, THESIS TOPICS, UNIVERSITY & POST-GRAD STUDENTS |
33485. Electropolishing Inconel 718 new (February 2)
58231. Electroless plating of "other" metals [Colorado] new (February 1)
34579. Gold or Silver which is the better electrical conductor? new (January 31)
58188. Zirconium and iridium plating of copper [Maryland] (January 19)
58189. Nickel and cadmium separation [Iran] new (January 18)
57929. Formula for electroless nickel [Iran] (January 2)
58112. Which acid dissolves iron but doesn't attack copper, silver, or zinc? [India] (December 21)
57999. Electroforming Copper onto Glass [Illinois] (December 16)
58027. Can't successfully scale-up Electrodeposition from good lab results [Texas]
(December 13)| i |
6c. K-12 SCIENCE PROJECTS, GRAMMAR & HIGH SCHOOL STUDENT QUESTIONS |
58005. Commercial availability of nano composites? [India] new (November 22)
57866. Electroplating solution for Fe20Ni80 permalloy [Oregon] (October 19)
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