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Categories
 Process: 0. Corrosion. Compatibility, Choosing a Finish
 Preparation: 1a. Mechanical Prep 1b. Chemical Pretreatments 1c. Masking & Racking
 Inorganic Finishing: 2a. Stainless Steel & Titanium Processing 2b. Anodizing & Light Metals 2c. Electroplating & Electroforming
2d. Electroless Plating 2e. PVD, CVD, Vacuum Processes 2f. Galvanizing, Hot Dipping
2g. Black Oxide, Bluing, Coloring 2h. Other Inorganic Finishing Processes
 Organic Finishing: 3a. Electropainting, Autophoretic 3b. Powder Coating 3c. Lacquers, Clearcoats
3d. Painting, Printing, Adhesives, Organic Coatings
 Post-treatments: 4a. Chemical Post-treatments 4b. Baking & Non-chemical Post-treatments 4c. Stripping, Reworks, etc.
 Supporting Issues: 5a. Analysis, Lab Technique, QA/QC 5b. Water, Wastewater, Pollution 5c. Safety, Emissions, Toxicity
5d. Plant & Process Engineering 5e. Software, Specs, Books, Stats 5f. World Wide Word Of The Week
5g. REACH, RoHS, E-O-L, etc. 5h. Mostly metallurgy 5i. Precious Metal Recovery
 Non-industrial: 6a. Hobbyists, Enthusiasts, Artists 6b. Research, Thesis work 6c. K-12 Science Projects, Elementary to High School
 Not Metal Finishing: 7. Off Topic, but Interesting

0. CORROSION, COMPATIBILITY, CHOOSING A FINISH . . .

18759. How to fasten aluminum sculpture to marble base for exterior location (December 11)
01686. Hard Chrome Plating vs. Plasma, HVOF, Flame Spray (December 11)
61047. Protecting selective areas on precision machined weldments of Large Synoptic Survey Telescope open Q. (December 11)
41526. Comparing materials for solar water heater (December 9)
43834. Cadmium coated bolts / nuts for seawater exposure open Q. (December 6)
57437. Specification of Ceramic Coating on Bolts & Nuts (December 6)
60988. Need Hard, Inexpensive, Corrosion Resistant Stainless Steel open Q. (December 6) 2nd Request
13089. Any alternative to cadmium plating; if not, who can do it? (November 1)
58242. Is galvanized or powder coated material better? (October 15)
41930. Galvanic Corrosion between Galvanized Steel and Aluminum (October 9)
40943. Black finish for nuts & bolts on off-road trucks (October 3)
19766. Stainless screws with galvanized decking open Q. (September 23)
48076. Zinc plated (Fe/Zn 5) vs. 410 Stainless Steel screws open Q. (September 20)
11178. Non-conductive plating for copper (September 19)
42140. Connect aluminum mounting plate to concrete wall in wet environment (September 13)
27167. Insulating tape between stainless and aluminum? (September 13)
15625. Prevent galvanic action between steel and aluminum sheets (August 27)
26415. Nickel-chrome plating vs. silver nitrate finish (August 21)
58242. Want cheap alternative to galvanized sheet but with equivalent properties (August 8)


1. PREPARATION . . .

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

06053. Best but least expensive polishing of stainless screws (December 9)
52593. Safe Buffer RPMs for Polishing Aluminum open Q. (November 16)
61035. Polishing aluminum deposited on glass to 0.2 nm open Q. (November 16)
09252. Want beadblast look on Titanium from tumbling or vibratory finishing (November 10)
00151. Are higher Rz finishes rougher or smoother? (November 1)
12526. How can SSPC and ISO 8501 spec apply to stainless? open Q. (October 17)
14468. Animal Free Polishing Compounds? open Q. (October 14)
42981. How to do a passivation quotation? (October 10)
26572. Can you tumble stainless to a high chrome mirror finish? open Q. (October 8)
21712. Deburring of Aluminum components (October 8)
05396. Is this surface smooth enough? (September 5)
20634. Grit Size and Related Surface Roughness Values open Q. (August 16)
45348. Zinc die casting parts black spot after shot blasting open Q. (August 16)
32581. 3-in-1 chemical to Pretreat for Powder Coating (July 19)
06753. Converting Ra to Rz1max camera (July 18)

    1b. PRETREATMENTS
    [CLEANING, PICKLING, ETCHING, PHOSPHATIZING, ACTIVATION]

07897. Iron phosphating a copper tube with aluminum fins (December 12)
53135. Components used in degreasing & derusting (December 6)
03537. Rainbow coloration on parts after electrocleaning (November 21)
12028. Is poor rinsing causing pickled steel to rust? open Q. (November 20)
41054. Etching TiW with hydrogen peroxide open Q. (November 16)
17279. Procedures for Pickling and passivation of carbon steel pipe (November 16)
47682. Electropolishing & Chemical Etching of Cobalt Chromium for Medical Applications open Q. (October 26)
58049. How to formulate Zinc Phosphate. Is nanotechnology pretreatment better? (October 17)
41404. Parts rusting after zinc phosphating open Q. (October 17)
10242. Black line on the wire after zinc phosphating open Q. (October 15)
53480. Surface finish is roughened by phosphating open Q. (October 1)
17826. Phosphating coating weight too high or too low open Q. (September 23)
34052. Manganese phosphate problems and solutions camera open Q. (September 19)
10242. Surface Activation for Phosphating: Grain Size Issues open Q. (September 14)
41698. How to prevent rust after removing oil? (September 3)
37180. De-rusting/De-scaling of Heat Treated Parts (August 10)
03480. Poor salt spray test for hydrogen-embrittlement baked phosphating (August 9)
10242. Zinc phosphated surface problems (July 30)

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

33366. Masking areas during chrome plating process camera (December 9)
51314. Why do we need to mask ends of bore before plating? (December 6)
09494. Problems masking for anodizing plus electroless nickel (October 11)
04589. How to prevent anodizing on inside of hollow sections (July 11)


2. INORGANIC FINISHING PROCESSES . . .

    2a. STAINLESS STEEL & TITANIUM PROCESSING

50226. Is type 202 Stainless Steel okay for cryogenic use? open Q. (December 5)
50878. Can dry citric acid powder passivate stainless steel? open Q. (December 5)
46967. Reworking passivated stainless steel parts (December 5)
04564. Passivating 4340 steel (November 20)
61033. Size loss of up to .001" during passivation of stainless steel open Q. (November 9)
54187. pH and acid measurement in stainless steel pickling (November 8)
47017. Chemical to clean weld marks from stainless steel (November 1)
50746. ASTM A967 vs. AMS 2700 (October 17)
00246. Stainless has a brown tint (October 16)
14897. What is the difference between Nitric 1 and Nitric 4 passivation? (October 16)
25352. Titanium discoloration open Q. (October 14)
24520. Anodizing vs. PVD for gold colored stainless steel? (October 14)
14182. Frosted appearance on passivated parts (September 23)
46108. Passivation of 304SS for 960 hour salt spray (September 20)
18495. Electropolishing of aluminum and stainless steel (September 18)
16519. Heavy scale on Inconel spring type heating element (September 8)
25617. Titanium grade 9 pickling control open Q. (September 7)
05000. Barrel/Tray Electropolishing Help Please open Q. (August 2)
50566. Titanium chemistry in HF and HNO3 chemical milling open Q. (July 23)

    2b. ANODIZING AND LIGHT METAL TREATMENTS (Aluminum, Magnesium)

06930. How to make the etching solution for aluminium anodizing open Q. (December 12)
43963. Aluminum finish and Liquid Penetrant (NDT) Testing (December 11)
27542. Anti-galling surface treatment for aluminium? (December 11)
37711. White Streaks during anodizing of 6063 extruded Aluminium open Q. (December 9)
02994. What happens when Painted parts are put back into Alodine 1200s tank? (November 25)
01419. "Neutralizing" sulphuric anodizing solution with bicarbonate (November 16)
02758. Bright dip solution for 6063 aluminum windows extrusion? open Q. (November 15)
22496. De-smutting of aluminum (November 12)
10893. Shelf life of Alodine 871 pen open Q. (November 11)
55760. Green Dyed Aluminum Anodizing Rubs Off at 170 °C open Q. (November 8)
06559. What pH for Alodine 600? (November 4)
61025. Alkaline Anodizing of Aluminum open Q. (November 1)
15173. 6061-T6 aluminum corrosion protection (October 28)
11462. Is trichloroethylene okay to degrease aluminium? (October 24)
30512. Should "720 Rule" include area of the racks? (October 17)
50885. Thickness vs. weight of hard anodize coatings (October 15)
16006. Chromate conversion coating aluminum parts having inserts open Q. (October 11)
22258. Chromic acid anodizing: introduction and possible problems (October 11)
30736. Aluminum bright dip without nitric acid open Q. (October 10)
57367. Can duplex sealing enhance black dye stability? (October 10)
14122. Re-anodizing Aluminum camera (October 8)
03985. Steam turns aluminum yellow (October 8)
15018. Hard Coat Anodize is Chipping and Flaking camera open Q. (October 3)
46180. Neither titanium nor aluminum is satisfactory for our anodizing racks (September 27)
56581. Rainbow effect / defect on anodized aluminum? (September 25)
33933. Chromatizing on anodized surface open Q. (September 23)
56828. Chalking after electrocolor dying process on anodized aluminum open Q. (September 23)
61011. Type II and Type III on same part open Q. (September 20)
45834. How to print onto open-pore Anodized Aluminum open Q. (September 18)
58894. Material Defect or Hard Anodizing Defect? open Q. camera (September 18)
52830. Minimum aluminium thickness for anodising (September 18)
14545. Matte Black Anodization (September 18)
60999. Dye color removed when bending anodized sheet open Q. (September 17)
42416. Aluminum Activation For Electroless Nickel Plating (September 16)
11225. "Dishwasher Safe?" Anodized Aluminum open Q. (September 12)
26894. Problems in cold sealing of anodized aluminum open Q. (September 12)
61001. Nylon 6/6 rubbing on anodized aluminum lubricates it open Q. (September 11)
60994. Color anodizing braided fuel lines camera (September 9)
47263. Reducing chloride concentration in acid copper bath open Q. (September 8)
10807. Hard coat with PTFE fails 336-hour salt spray (September 7)
30670. Mottling / leopard spots after anodizing sandblasted aluminum profiles camera (September 6)
00085. Copper electroform is not bright (September 3)
50478. Anodized surface is powdery camera (August 29)
60989. Blue Dye coming off anodizing camera open Q. (August 27)
45313. HF/HNO# Desmut for Aluminum - Control Measures? open Q. (August 20)
29662. Roughness in acid copper plating (August 18)
04558. Why do I need chromate pretreatment before painting aluminum? (August 15)
27674. Cylinder bore / I.D. hard anodizing questions open Q. (August 13)
60879. Mill spots and discoloration in 6063 dark anodize (August 13)
33735. Aluminum parts are pitting in DI water (August 11)
06701. How to calculate anodizing time for different load sizes (July 31)
19342. Is default color of chromate conversion coating gold? (July 30)
26894. Problems in cold sealing of anodized aluminum profiles (July 27)
60967. Anodizing color variations in a single profile camera (July 24) vip
13823. Finishing Aluminum Castings: burrs / flash / lamination issues camera open Q. (July 19)

    2c. ELECTROPLATING and ELECTROFORMING

27192. How to avoid defects occurring in electroplating (December 12)
28851. Black patches in Zinc-Nickel Plating (December 11)
26136. Need alternative to decorative chrome plating (December 11)
00993. Metal balls sticking to each other in Sn plating open Q. (December 11)
00907. Zinc plating of powdered metal parts (December 11)
01114. Parts sat in bronze plating solution for several days open Q. (December 11)
07070. Ni plating over Stainless steel for 96 Hrs SST resistance (December 11)
24316. Composition of makeup solution for bronze plating (December 9)
01871. Hard Chrome Plating Pits camera open Q. (December 9)
38877. Alkaline zinc plating problem (December 9)
53207. Hard chrome plating inside the cylinder camera (December 6)
61045. How to Calculate Current for Electroplating (December 2)
07124. Too many anodes in my Nickel electroplating tank? open Q. (November 26)
34750. Copper plating on magnesium (November 25)
14857. Nickel-chrome fireplace doors discolor camera (November 25)
37445. Black passivation has chalking, pitting, atmospheric corrosion? camera (November 22)
04001. Rusting On Iron parts after Nickel Plating (November 21)
30106. Zinc plating rusts quickly (November 17)
04221. Hex Chrome Plating Bath not maintaining temperature (November 11)
50375. How much rhodium is used in plating a pendant (November 11)
48993. Brown stain on zinc plating camera (October 28)
61024. How to properly activate white bronze plating? (October 26)
54353. Plating Chemical Usage Estimation (October 20)
33784. Blisters in Nickel-Chrome Plating of Exhaust Pipes (October 19)
42456. Impurities/contamination in Hard Chrome Plating Tank open Q. (October 11)
20395. Rhodium plating Q&A, woes & problems (October 11)
41517. Gold Plating Problems with Jewelry open Q. (October 9)
44771. Acid Copper Plating Problems open Q. (October 4)
17286. Best electrically conductive plating for mild steel? open Q. (October 1)
42108. Blue spots when Rhodium plating (September 29)
38220. Gold Plating Paliney 7 open Q. (September 26)
56433. "Commercial zinc plating" vs ASTM B633 standard (September 25)
48074. Hard chrome plating problems camera open Q. (September 23)
36272. Matte Tin Plating open Q. (September 23)
31751. Copper concentration keeps growing in copper sulphate plating (September 19)
49875. CASS Test Hours and Nickel-Chrome Plating (September 12)
18854. Carbonate problems in Cyanide Plating (September 11)
28708. Silver plating has white residue (September 10)
57369. Armoloy vs Hard Chrome (September 8)
28863. Problems in cyanide copper plating open Q. (September 6)
30399. Black spots in zinc plating (September 6)
37360. 150 micron Hard chrome plating on steel grade 316 (September 4)
30879. Plating thickness variation in hard chrome plating (September 4)
60992. Plating WITHOUT striking first (August 30)
57114. Alkaline zinc gets dull from baking open Q. (August 29)
60554. Nodule Problems in Cadmium Plating open Q. (August 27)
10051. Brass plating is too pink (August 27)
05183. We want to zinc plate but not do passivation (August 27)
17284. Plating bright nickel onto brass parts (August 26)
53424. Palladium + Gold Plating on Brass open Q. (August 23)
17234. Is this part suitable for Zinc-Nickel plating? camera open Q. (August 20)
31163. Zinc analysis in brass bath open Q. (August 20)
35480. Zinc Nickel Plated Parts Have Red Rust on top of the plating open Q. (August 11)
03946. Silver Plating is Yellow (August 9)
35342. White patches in Chrome Plating camera open Q. (July 29)
29024. Solder Plates onto Mold Compound Resin camera open Q. (July 30) 2nd Request
43712. Does nickel strike cause more hydrogen embrittlement than nickel plating? open Q. (July 29)
37073. White stains on tin plating camera open Q. (July 21)
56121. White spots during nickel plating open Q. (July 21)

    2d. ELECTROLESS PLATING, PLATING ON PLASTICS, IMMERSION PLATING, CHROME-LOOK SPRAYS

02153. Immersion Tin Plating on Aluminum open Q. (November 26)
45052. Electroless vs. immersion vs. displacement vs. contact plating (November 20)
61023. Electroless nickel plating process sequence (October 20)
15912. Does DI Water cause Electroless Nickel Staining? (October 16)
20973. High gold thickness on lower half of PCB (October 4)
61017. Black spot observed on electroless nickel plated steel (October 3)
23262. Electroless nickel-boron plating open Q. (September 26)
61000. Electroless Plating the Inside of a Large Container (September 11)
32955. Etching of ABS for Electroplating with chromic-sulphuric acid (September 6)
Q. 60993. Electroless Nickel Plating (ENP) rough grey finish camera open Q. (September 4)
43061. PVD vs. new Electroless Plating process open Q. (August 26)
22969. Want sample of activator rinse water to recover Palladium open Q. (August 22)
00449. Alternate to Electroless Nickel for Plating on Plastics open Q. (August 20)
11290. Electrolytic nickel on electroless nickel gasses violently (August 9)

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

45276. Marks on PVD coating camera (December 11)
13115. 24 karat gold color PVD TiN? open Q. (December 10)
57133. PVD vs. e-coating for gold color (November 1)
61027. Changing vacuum conditions in PVD open Q. (October 29)
34692. Titanium nitride plus real gold (October 16)
56476. Seeking White PVD Coatings open Q. (October 9)
11351. Distance from target to object for ZrN coating (October 2)
37921. How thick can I chrome plate copper with PVD? open Q. (September 18)
07846. PVD coating color control -- Looks good initially but darkens in a day (September 16)
46513. TiC Sputter Coatings Not Adhering open Q. (September 12)
43061. Electroless plating vs. PVD open Q. (August 27)

    2f. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

29835. Visual appearance of hot dip galvanizing vs. zinc electroplating (December 11)
41571. Reduce ash generation in galvanizing open Q. (December 9)
48000. Soft ash deposits on galvanized steel open Q. (December 6)
42842. Rusted hot dip galvanized bolt and nuts camera (November 12)
57322. Thick Galvanized Coatings, How to Get, What is Maximum? (November 11)
44450. Galvanizing Degreaser Testing (November 11)
56867. Stains on galvanized expanded metal fencing camera (November 9)
20235. Lead in hot dip galvanising open Q. (October 29)
43365. Hot dip galvanizing flux Q & A's, Problems and Solutions (October 26)
24269. Galvalume/zincalume-coated steel structural studs (October 19)
40753A Can solidified zinc be effectively cut from old galvanizing kettle? (October 13)
49676. Galvanizing thickness estimate (October 13)
38207. Spangle control in galvanizing open Q. (October 9)
54709. Chromate quench (October 8)
47534. Galvanising Plant Ash & Dross (September 25)
39461. Galvanized coating is peeling off of wire camera open Q. (September 20)
07764. Air knives for galvanizing thickness control (September 16)
38915. Peeling problem in galvanizing of steel camera (September 15)
41209. Lowering Iron (Fe) in Galvanizing plant flux tank (September 15)
24568. Lead in Galvanizing: SEM and Melt Analysis gave very different answers (September 3)
42343. Can we use 316SS Lining in Galvanizing Kettle? open Q. (August 22)
50428. Formulating galvanizing flux to minimize fuming (August 6)

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

13097. Basket contact marks in black oxiding (October 15)
00531. Acceptance criteria of blackening parts camera (September 10)
12141. Ion vs. Gas nitriding of H13 Tool Steel open Q. (September 3)
39444. Removing excess oil on phosphated fasteners (July 12)


    2h. OTHER INORGANIC FINISHING: Mechanical Plating, QPQ, Metal Spray, Zinc-rich Dip-Spin Coatings, Sherardizing, etc.

09101. Can WS2 Dri-film adhere to Silicone? open Q. (May 24)
05718. Description of Malcolmizing Process open Q. (May 6)


3. ORGANIC FINISHING PROCESSES . . .

    3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS

39698. CED Paint conductivity is dropping/climbing open Q. (November 15)
61012. Electrocoating: Auxiliary/Remote Anode for interior coverage? open Q. (September 26)
46897. CED Coating has face shining problem open Q. (September 25)
32574. ED tank is getting half painted open Q. (September 17)
28116. Dipping in primer without electricity (September 9)
41658. E-coating of galvannealed material open Q. (August 10)
46042. Recovering paint from CED E-coat rinse with Ultrafiltration open Q. (August 10)
57561. Pin holes in CED e-coating open Q. (August 1)
53205. E-coating vs. Zinc plating open Q. (July 22)

    3b. POWDER COATING

26699. Need 5 mil thick powder coating (December 11)
15733. Time between pretreat and powder coating (December 3)
14221. Activating a metal surface for powder coating open Q. (November 6)
48147. Explain the relationship between coating thickness and gloss on powder coated parts (October 10)
18298. Powder coatings blisters and peels from elevator doors open Q. (October 2)
47439. Powder Coating Galvanized Steel: pinhole problem? (September 26)
05163. Delamination of chromate camera open Q. (September 23)
61002. Flattening the ends of mild steel tubes leads to corrosion? (September 11)
23304. Powder Coating Adhesion Testing camera (September 6)
50530. White spots and blistering of powder coated furniture camera (August 29)
36503. Possible to powder coat 70-80 microns thick? (August 23)
42644. Pinhole problems in powder coating of anodized aluminum open Q. (August 6)

    3c. LACQUERS, CLEAR COATS, ELECTROPHORETIC TINTING, ANTI-TARNISH

28527. Vacuum metalizing basecoat (December 2)
61041. Finishing porous brass casting before lacquering open Q. (November 18)
12486. How to do lacquer on brass and zinc? (October 20)
33187. Consistent Brass finishing Process needed open Q. (October 14)
51966. Some CED Problems and Q&A's open Q. (October 9)
13029. Salt Spray Comparison, CED vs. CED Plus Powder Coating (August 26)

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

33380. Ionization systems for paint booth air open Q. (December 9)
60877. Does Wash Primer have Hexavalent Chrome? (December 5)
49900. Must all Kynar Paint be heat baked? open Q. (October 24)
06225. Painting galvanized ductwork open Q. (October 11)
18779. How to do Teflon coating on steel storage tank open Q. (September 30)
29978. Zinc-rich primer on aluminum (September 22)
25543. Laser marking on colored tempered carbon steel camera open Q. (September 1)
29247. Teflon coated hangers acceptable for continuous use in heated area? open Q. (August 20)
26015. Recoating new PVDF coated panels to change their color open Q. (July 16)


4. POST-TREATMENTS

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

18314. Electrolytic chromating of Silver (December 7)
33081. Blackening won't adhere to nickel electroform (August 13)

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

01216. Hydrogen embrittlement despite baking (December 11)
01747. Chrome plating and Hydrogen Embrittlement Relief open Q. (November 26)
53824. Stress relieving parts then inventorying for plating in the future? (October 26)
34791. Soldering nickel plated and laser marked components open Q. (August 6)
45934. Nickel plating followed by tin plating is blistering (July 18)
55972. Black stained areas on annealed surface open Q. (July 3)

    4c. STRIPPING, REWORKS, ETC.

44254. How to strip 60/40 tin lead open Q. (October 11)
00619. Can't remove copper stop-off after boronizing open Q. (October 11)
14893. Stripping chrome plating from metal (October 3)
15927. Strip Nickel Chrome from plating racks open Q. (September 21)
41112. Even aircraft stripper won't remove powder coating (August 2)
22156. Stripping paint from polyketone hooks open Q. (July 26)
26547. Can Sodium Meta nitrobenzene sulphonic acid be used to make nickel stripper? open Q. (July 26)


5. SUPPORTING ISSUES

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

61046. Labs say there is no chrome on our 'chrome plated' parts open Q. (December 9)
20174. Gravimetric analysis of sulfates in Alodine 600 open Q. (November 21)
41155. How to analyze for NaCl in a Boric Sulfuric anodizing tank? (November 15)
41654. Determine % Nitric Acid. Titration? Conversion factor? (November 15)
08976. Sodium hydroxide analysis in alkaline zinc plating open Q. (October 29)
61026. Uncoated carbon steel and 96-hour salt spray test (October 26)
20173. Copper Sulfate Test Method to Verify Zinc Plating? open Q. (October 24)
44029. Analysis of metals and acids in Electropolishing Baths for stainless steel open Q. (October 17)
44293. Titrimetric procedure for trivalent and hexavalent chromate analysis (October 17)
02401. Correlation between accelerated weathering duration and natural weathering (October 14)
05675. Analysis for anti tarnish efficacy on silver plated items open Q. (October 1)
27688. Quantitative analysis of nitric acid in a mixture of nitric and sulfuric acid open Q. (September 30)
35573. Acceptance criteria after salt spray test (September 29)
35341. Chisel-Knife Adhesion Testing of AMS 2411 Silver Plating open Q. (September 26)
50120. Need to measure hard chrome plating thickness on stainless open Q. (September 26)
08904. Correlate salt spray test hours to life expectancy (August 27)
60971. How to test hard chrome plating operation without using dangerous copper sulphate test (August 27)
50132. Q&As on Operation of ASTM B117 Salt Fog Test Chambers open Q. (August 7)
09676. Nickel and Tin Plating Fails Humidity Test (July 27)

     5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

46503. Electronic descalers for removal of silica? open Q. (December 6)
58940. De-ionizer life is cut in half open Q. (November 18)
01835. Is Silverlume Part B a hazardous material? open Q. (October 24)
11849. The composition of Electroplating wastewater (October 17)
04630. Demineralization (Water Treatment) Problems open Q. (October 3)
15683. Safety of Sanding Galvanized Metal (October 2)
39277. Recovery of spent HCl open Q. (September 19)
22905. Will RO water attack PVC Piping? (September 18)
01224. Alkaline Cleaner effect on Wastewater Treatment (September 14)
12873. Full House Water Filtration of Silica open Q. (September 10)
32443. pH of DM water is a mystery (August 13)
32633. Clarifier rise velocity calculation (August 13)
52466. What is Cation Conductivity (related to high pressure boiler) (August 13)
49809. Is an RO System beneficial for a DM plant? (August 12)
12215. Change Hexavalent to trivalent chrome (August 9)

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

45592. Is Rustoleum safe for cookie cutters? (December 6)
47195. Hexavalent chromium in coffee grinder (December 6)
21863. Can gas logs be used in lead painted fireplace? open Q. (November 16)
35556. Fumes from Nichrome heating elements? (October 30)
19953. What's the toxic effects of mixing muriatic acid and bleach (October 14)
07164. Is galvanised steel poisonous? open Q. (October 10)
14264. Metal roofing/siding used as cover over BBQ (September 30)
22256. Is low volume usage of TCE harmful to employees? (September 24)
61008. Stainless Steel Storage Tank absorption risks (September 18)

    5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

00897. Clipping (Racking) Mechanism for Electropolishing Nitinol Medical Devices (December 11)
38265. Must copper bus bar be tin plated? (December 9)
16284. Efficiency & ripple of electroplating rectifiers open Q. (November 27)
48519. Best heating/cooling coil material for acid zinc (November 12)
06364. Dangler Gets Burned after 8 Mins of Plating in ZnNi Tank (October 20)
34214. Tack testing per FED STD 141D open Q. (September 20)
61009. Ventilation requirement for Manganese Phosphate line open Q. (September 19)
56947. Voltage & current, and rectifier parameters & selection for plating process open Q. (September 16)
40335. Protection of Stainless Steel Tank for Electroless Nickel Bath open Q. (September 6)
60990. Rubber lined nickel tank got plated camera (August 29)
60986. How to remove dissolved zinc from ferric chloride solution open Q. (August 24)

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

49676. How to calculate/measure the thickness of zinc coating (December 5)
61043. Body-In-White spec: cleanliness before degreasing open Q. (November 23)
25220. Should I specify zinc plating per ISO 2081 or per ISO 14713? (November 4)
54612. In-house test for passivation of stainless steel (October 16)
08359. Lot Inspection per AMS-QQ-P-416 (October 16)
07627. Specification for Chromate Conversion Coating of Copper open Q. (September 25)
01217. Dichromate seal boils at too low a temperature (September 7)
44848. Surface finish Rz and RHSC requirements open Q. (August 20) 29054. Phosphating zinc plating instead of chromating? open Q. (August 15)
26629. Questions about zinc electroplating specification MF ZN 5C open Q. (August 13)
60969. Cyclic Trends and Seasonality within the Industry open Q. (August 9)


    5f. WORLD WIDE WORD OF THE WEEK

61048. What is "IMMUNIZE" finish? (December 12)
57491. Where can I source for material SGCC? open Q. (November 8)
34019. IS A CHROMIC ACID DIP THE SAME AS ANODIZING? (October 10)
61014. Nickel striked or struck? silly :-) (September 25)
38818. Almite Coating Revisited open Q. (August 3)
32305. Sera blowholes in aluminum die casting open Q. (July 16)
60968. Convert KLY to KiloJoules (July 9)
49424. Rejects vs. defects (June 19)

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

41276. Want glossy full black trivalent chromate for zinc plating (October 14)
11950. Zinc plating with trivalent chromate rusts during monsoon season (September 7)
55350. Blue or yellow passivation better after Zinc plating? (September 4)
58218. Difference between ASTM B633 type III and type V chromating (August 9)

    5h. MOSTLY METALLURGY; Heat Treatment

15043. Problems in Annealing of Copper Wire (October 26)
30998. Making a solid rhodium ring open Q. (September 11)
13204. Annealing 316 stainless steel .125 diameter wire camera open Q. (September 11)
00336. Rusting of stainless steel at weld (September 3)
45435. Removing magnetism from 304 Stainless Steel (August 11)
51470. Hardening EN8 / EN9 parts. Q&A's, Problems & Solutions open Q. (August 2)

    5i. PRECIOUS METAL RECOVERY

13037. Reclaim Gold from Electronics open Q. (October 17)
42694. Stripping & recovering silver from silver plated scrap (September 14)
54457. Removing gold from aqua regia with zinc powder? (September 13)
19529. Refining of silver chloride to silver metal (August 30)
34676. Refining Gold Flakes in Clay (August 24)
34532. Solution for precipitating gold from HAuCl4 solution camera open Q. (August 4)
26353. Cleaning gold that has been burned (July 16)
22253. Refining of Palladium and making its salt (July 11)


6. CONSUMER, RESEARCH, & STUDENT ISSUES

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

06773. Remove gold plating from flatware open Q. (December 12)
29394. Spot tests for plating type identification (December 11)
34618. New dishwasher detergent discolors silver open Q. (December 11)
33758. Gold ring turns my finger green & black open Q. (December 9)
38112. Restoring Nickel Plating on Cast Iron (December 9)
38969. Electroplating Aluminum onto Graphite (December 6)
53013. How much area will 4 grams of gold cover? (December 6)
48396. How to increase dendrites and branching in copper plating?open Q. (December 5)
35145. How to clean brass ATMOS clock? open Q. (December 3)
57748. Can copper be plated onto zinc diecast? open Q. (November 25)
29370. What does 14K A & P mean on jewelry? camera open Q. (November 17)
61040. How can I improve my DIY black oxide coating process? camera open Q. (November 16)
39354. Heat colouring of titanium open Q. (November 16)
55324. Gold plating on brass chalice quickly tarnished open Q. (November 16)
24718. Preventing electro galvanic reaction between aluminum and steel open Q. (November 15)
07352. How to coat objects for iridescence open Q. (November 12)
04785. Cleaning/Polishing Silver with Aluminum Foil and Washing Soda open Q. (November 12)
06873. Variant on japanning called Crystal Japan camera (November 5)
13189. Want Non-Conductive Metal Watch Case open Q. (November 1)
19006. Black powder finishing on rim of Stainless steel food canisters open Q. (November 1)
14585. White gold and rhodium over sterling silver ring (October 31)
12362. Coating outdoor table with thick clear pourable epoxy open Q. (October 26)
15303. Safety of bronze flatware/serviceware open Q. (October 26)
52522. Stained stainless steel refrigerator (October 26)
26616. Finding equivalent to mirror effect paint as this is not available (October 26)
00284. Can I brush gold plate resin figurines? open Q. (October 24)
08966. Cleaning gold plated tea service (October 20)
08937. Problem refinishing cast iron fireplace surround camera open Q. (October 20)
17571. Refinishing Bathroom Faucets / Fixtures open Q. (October 19)
18493. Sterling silver is turning pink (October 19)
28810. Old Sheffield "The Silver Solution" is dried up. Can I re-wet it? (October 16)
15006. Did I etch gold plated brass too deep? (October 14)
20240. More strange U.S. pennies camera (October 11)
30442. What paint do I use on a metal mailbox? (October 10)
32537. Remove oven cleaner damage from aluminum (October 4)
19866. Cleaning zinc clad tabletop? camera (September 29)
29643. Cleaning a church bell (September 29)
40020. Coloring/antiquing a hammered/beaten copper sink camera (September 29)
17772. Anodizing polished aluminum for use as reflector (September 23)
02899. Copper whisker challenge: how to grow copper whiskers camera open Q. (September 23)
56353. How to do copper electroforming onto wax surface camera open Q. (September 22)
54096. Is my old ceramic lamp gold plated or not? (September 20)
31486. Adding patina to galvanized metal open Q. (September 20)
30532. New chrome exhaust pitted [blistered?] from 3-mile ride camera (September 19)
22490. Painting aluminum swimming pool coping open Q. (September 18)
61005. Effects of agricultural lime dust on metal roof open Q. (September 13)
23302. Decorating Painted Galvanized Garbage Cans open Q. (September 12)
39591 Sanding aluminum to matte finish (September 9)
44219. Corrosion in Ford diesel fuel tanks (September 9)
35277. How long can brass be buried? (September 9)
22092. Q&A's, Problems & Solutions on Ruthenium Plating Process open Q. (September 8)
01198. Restore graduated blackening on bronze bowl open Q. (September 6)
53865. Painting tile around fireplace camera (September 3)
10209. Discoloration of stainless exhaust headers open Q. (September 1)
30092. Etching an aluminum threshold to remove concrete stains (September 1)
41066. Fixing aluminum discolored by dishwasher (August 29)
57569. Cleaning Copper Bus Bars (August 29)
18751. Turning yellow gold jewelry into white gold? (August 27)
07423. Painting & Ospho (August 26)
23038. How to do safe silver plating on sea shells open Q. (August 20)
10626. Will laundry pen markings wear off my plastic backpack and stain my clothes? (August 20)
20702. Re-anodize of aluminum cookware (August 15)
21436. Protecting bronze gravemarkers open Q. (August 15)
07229. Cleaning a silver plated lamp open Q. (August 15)
26438. Type 304SS anodes for gold plating? (August 15)
50258. How to bake Powder Coating at home open Q. (August 10)
58983. Can't get even patina on gutters and leaders camera open Q. (August 10)
11353. Easy yellow chromating of clear zinc plated fasteners (August 9)
38381. Painting brass fireplace doors (August 6)
39781. Restore patina on antique brass sink basin open Q. (August 3)
59257. Replating foot pegs on Norton motorcycle (August 3)
49779. What is the base metal for silver plated flatware? (August 2)
53765. Copper sink stains and discoloration open Q. (August 1)
37065. What roller do you use with cellulose paint? (July 30)
27488. Value of silver baby cup? (July 26)
14075. What Solution for Etching sterling silver? open Q. (July 23)
37324. Rhodium allergy? (July 21)
28610. How long should a rhodium plated black finish last? (July 19)
49168. How functional is copper plated steel as artwork? (July 19)

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

22644. Increasing plating speed with agitation, eductors, or non-aqueous baths open Q. (December 12)
39965. Digestion of mineral-organic mixture open Q. (December 12)
61034. Aluminium Anodizing followed by reverse-anodizing (December 5)
27089. Electrodeposition of Tungsten? open Q. (November 12)
23142. Good selective coatings for solar absorber open Q. (October 27)
07162. Chemical formula for chromating solutions open Q. (October 11)
61010. Copper Electroplating Experiment with Salt Bridge camera (September 29)
06524. Electrodeposition of Manganese nanowire open Q. (September 23)
45300. How to do Electroforming to make gold jewelry open Q. (September 9)
60970. How to Make Black Nickel Thin Film from Ni2O3 Powder open Q. (August 15)
29662. The Role of Sulphuric Acid in Copper Plating open Q. (August 4)
02252. Applying Teflon to non-anodized aluminum? open Q. (July 16)
49165. Speeding up rusting/oxidation of metals with ferric chloride & peroxide open Q. (July 16)

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

33606. Science project: plating copper onto steel (December 9)
43647. How to measure corrosion for science project (November 21)
26203. Measuring conductivity of fruits and vegetables open Q. (October 29)
04134. Copper sulphate reaction with steel wool (October 2)
33608. Coke is still supposedly dissolving pennies (August 12)

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

61036. Unexpected color change in acid solution for soil digestion (November 21)
37106. Cleaning roof mold/moss with bleach (November 16)
13743. Maple Syrup Boiling / Evaporator Pans: use Mild Steel or Galvanized or What? (November 15)
11303. Tarn-X spilled on Granite countertop open Q. (October 31)
53795. Want a chemical that heats up open Q. (October 20)
08792. Where's my Allied-Kelite pension? (October 14)
18029. About licensing for white floor cleaner open Q. (October 1)
21381. What are the five metals of panchalogam open Q. (September 30)
11228. My rabbit may have eaten a boric acid tablet open Q. (September 29)
49464. Cleaning up cement dust from sanding of concrete floor (September 22)
27653. Will modern coinage survive for thousands of years like "Roman" and "British" coins? (September 20)
33143. Stiffel lamps need repair (September 9)
24359. Barber Chair Restoration Q&A's and Successes open Q. (August 27)
09128. Copper Sulphate as Swimming Pool Algae Remedy? (August 26)
20443. Difference between pure silver and sterling silver open Q. (August 16)
21692. Convert GSM coating thickness to microns (August 15)
58463. Any practical way to add pitch to garage floor? open Q. (August 13)
52212. Cleaning blackened bank notes (July 25)
11377. Taking an antique brass bed apart camera open Q. (July 19)
26096. Bamboo flooring problems (July 11)

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
opinion!= Comments may raise blood pressure
silly :-)= For those with a sense of humor
video= Contains embedded video
camera= The inquiry has photos / graphics
pdf= Contains embedded pdf
vip= Inquirer often helps others, so especially deserves our help
spanish= Thread is partially in Spanish

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