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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. Anodizing & Light Metals 2b. Electroplating & Electroforming 2c. Electroless Plating
2d. PVD, CVD, Vacuum Processes 2e. Galvanizing, Hot Dipping 2f. Black Oxide, Bluing, Coloring
2g. 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 . . .

19766. Galvanic Action between Galvanized and Stainless Steel? open Q. (June 21)
13089. Galvanic compatibility: electroless nickel and olive drab cadmium? open Q. (June 18)
16063. Coatings for screws and nuts in garden boxes (May 30)
43283. Electrodes best suited to split water (May 23)
60956. Torque Increment process in Bronze C-95500 hot line clamp camera (May 18)
40943. Black zinc plating vs. Black oxiding. What's the difference? (April 15)
50328. What coating is on this 416SS which is 50µm thick with hardness of 35-40 HRC? open Q. (April 15)
42140. Correct usage of 4 metals in electrical circuit open Q. (April 8)
01744. How long will stainless steel last in salt spray test? (April 8)
31153. Stainless screws okay on aluminum machinery? (March 25)
34692. Gold plating + clearcoat vs. titanium nitride for jewelry (March 19)
22402. Alternative spring coatings instead of "flock" (March 18)
35528. Hot dip cadmium coating? (March 18)
41930. Will my anodized aluminum solar panel frames face galvanic corrosion? (March 18)


1. PREPARATION . . .

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

00897. Electropolishing nitinol open Q. (June 4)
07560. Least expensive way to get N8 or N6 finish on graphite? (May 24)
26572. Tumble polishing stainless steel (April 24)
12526. Interviewer says SA2.5 measures surface roughness not cleanliness open Q. (April 17)
21712. Deburring of Aluminum components (April 16)
05396. Is this surface smooth enough? (April 7)
14468. Formula for polishing & buffing compounds open Q. (April 4)

    1b. PRETREATMENTS
    [PICKLING, PASSIVATION, PHOSPHATIZING, CLEANING, ELECTROPOLISHING, ACTIVATION]

05422. Stains on electropolished surfaces camera open Q. (June 25)
56202. 440C stainless turned black when passivated open Q. (June 25)
29208. Citric acid for cleaning phosphate buildup from spray tips, etc. open Q. (June 18)
51678. Rust in Cast Iron parts with internal cavities after Mn Phosphate & Waxing (June 15)
53135. 3-step, 5-step, or 7-step Phosphating for Almirahs? (June 15)
13235. Steel Pickling Line does unwanted Copper Plating open Q. (June 8)
10882. Chemical and electrochemical etching of stainless steel open Q. (May 28)
58455. Electropolishing Series 4xx stainless steel open Q. (May 26)
11047. How to know when to dump/decant electropolishing bath (May 24)
10242. Zinc phosphated surface is brown instead of black (May 20)
39913. Selective / Touch-up Passivation of Stainless Steel (May 9)
06885. Problems & Solutions in Passivation of Titanium (May 9)
06053. Want shiny finish on stainless steel bolts/screws (April 28)
42333. Mirror Electropolishing of 2205 Duplex Stainless (April 17)
47017. Chemical to clean weld marks from stainless steel (April 11)
42723. Passivating stainless steel tanks (April 11)
56364. Maintaining acid levels in Nitric-hydrofluoric pickling process open Q. (April 6)
53648. Brush on Electropolishing open Q. (April 4)

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

60909. Can hard chrome plating survive 7-stage phosphatizing? open Q. (December 31)
58316. Liquid masking for anodizing (December 12)


2. INORGANIC FINISHING PROCESSES . . .

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

60967. Anodizing color variations in a single profile camera open Q. (June 25) vip
60966. Lifetime of Chemicals in Aluminum Anodizing (June 21)
43432. Anodizing On Cast Aluminum (ADC 12 grade) open Q. (June 19)
04422. Aluminum Anodizing Color Match Problems camera (June 12)
10820. Anodized 6061 aluminum fails salt spray test open Q. (June 8)
01819. Q&As on Teflon (PTFE) impregnated Hard Anodizing of Aluminum (June 2)
08147. Finishing titanium medical implants (May 9)
60958. Over-etched anodized parts and a ton of other problems (May 9)
45313. Aluminum de-smut/de-oxidize chemicals process & chemical Q&A's open Q. (April 30)
01353. What is the proprietary additive for room-temperature hard anodizing? open Q. (April 28)
14352. Aluminum Frame anodizing - how to prevent white spot at the frame joining camera open Q. (April 24)
11225. "Dishwasher Safe?" Anodized Aluminum (April 22)
07428. Fading hardcoat anodize camera open Q. (April 18)
15922. Sealing Hard Anodic Coatings (April 17)
31663. Plated aluminum for projection welding fixtures open Q. (April 16)
42711. Etching, deoxidizing, anodizing, sealing problems with type 2219 aluminum alloy open Q. (April 9)
46468. Problems in anodizing 7xxx aluminum open Q. (April 9)
07926. Two-tone titanium anodizing problems (April 9)
22258. Increasing aluminum in chromic acid anodizing bath open Q. (April 4)
42837. Aluminium vs. titanium anodizing racks open Q. (April 2)
05691. White Spots when Anodizing 6061 Aluminum and Dyeing It Blue open Q. (April 1)
06701. How to calculate anodizing time for different load sizes (March 30)
02530. Start the stopwatch when we begin immersing the load or when it's all the way in? open Q. (March 30)
60828. Trickle Charge to Protect Aluminum Cathode for Anodize (March 28)
19342. Is default color of chromate conversion coating gold? open Q. (March 13)
56917. Problems with Alodine not sticking camera (March 9)
44929. High temperature color anodizing (March 9)
45421. Black spots/streaks in anodized aluminium (March 7)
05112. Pitting of 2024 Aluminum with Standard or Ematal Anodizing camera (March 2)
06733. Bright dip aluminum at room temperature (March 2)
54534. Hard Anodize Problem on AL2024 (March 2)
22121. Cleaning, pickling, etching of Ti-6Al-4V titanium Q&A open Q. (March 1)

    2b. ELECTROPLATING and ELECTROFORMING

03946. Silver Plating is Yellow (June 25)
10051. Brass anodes are polarized (June 25)
36668. Best plating for copper mould plates for continuous casting (June 23)
45418. Chrome plating bubbles and peels off Z3 diecastings (June 23)
12798. Rhodium plating on yellow gold (June 22)
18854. Carbonate problems in Copper Cyanide Plating open Q. (June 18)
22409. Safe plating thickness to not cause thread binding of #6 screw? (June 17)
29140. Additive for zinc plating to allow high temperatures without dullness open Q. (June 17)
30106. Zinc plating thickness vs. salt spray resistance (June 17)
36730. White stains in nickel plating camera (June 15)
47214. Black spots in cadmium plating (June 15)
47424. Blisters when Copper plating zinc diecast (Zamak) (June 15)
48966. Freezing out carbonates in alkaline zinc plating bath camera (June 15)
56140. Chloride contamination of chrome plating solution -- Analysis and Removal (June 15)
45031. Can Alodine work over Tin-Lead Plating? open Q. (June 6)
18940. Hardness & conductivity of different types of nickel plating open Q. (June 5)
12412. Silver plating bath brighteners (June 2)
36290. Blisters in Wood's Nickel, Bright Nickel, Gold Plating (June 2)
30419. Rhodium plating is dark and discolored (May 28)
12243. Cracks in tin plated surface (May 24)
47037. Chromate conversion on cadmium plating problems camera (May 24)
46708. Rhodium plating has a white rash (May 24)
06338. Rhodium brighteners after carbon filtration camera (May 24)
41922. Nickel Plating defect: white patches open Q. (May 23)
34092. Problem with potassium chloride/ammonium chloride acid zinc plating open Q. (May 16) vip
36390. Hard chrome plating isn't hard enough (May 16)
10210. Fine white grit on nickel plating. Excessive boric acid? camera (May 13)
11395. Plating tin on phos bronze (May 11)
09527. Buying a small plating business (May 7)
47970. Is our copper plating too hard? (May 5)
28003. Silver Plating of Switchgear Bus Bar turns black (May 3)
28032. Electroplating with Brass (Electrodeposition of Brass) open Q. (May 2)
55324. Barrier Layer to Prevent Tarnish on Gold Plated Silver (April 28)
60957. Can cad plating be applied over chrome? (April 26)
50905. Cyanide or sulfite gold plating better for my application? open Q. (April 26)
47340. Brightener consumption in nickel plating (April 26)
47484. Chrome plating ID of stainless tube (April 20)
04146. Electroformed gold is brittle (April 18)
15218. Is a nickel D crown anode the same thing as a nickel S round (April 17)
34821. Want gold flash plating layer 0.005 microns thick (April 14)
38265. Why must Copper Bus Bar be Tin Plated? (April 11)
38877. "Wire marks" when we wire tractor pins for non-cyanide zinc plating (April 9)
33774. Plating white bronze onto sterling silver (April 5)
07077. Black nickel is gray, not black camera (April 1)

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

11290. Electroless nickel for washing machine components (June 18)
13785. Reactivate electroless nickel without current (June 18)
35056. Electroless Nickel Plating with Silicon Carbide Particles (June 15)
18069. Alternative to chromic acid etch for plastics? (May 5)
24114. Discoloration of immersion tin plating open Q. (April 15)
46404. How to mix PTFE into an EN plating bath open Q. (April 9)
09379. Electroless Nickel Plating of Steel Molds for Plastic Injection Molding (April 7)

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

14081. Applying PVD metal coatings to ceramic tiles (April 17)
07846. PVD coatings: color control issues (March 9)

    2e. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

33979. Galvanizing a weldment of steel and stainless steel (June 20)
49676. Can we use Elkometer for measurement of galvanize coating (June 20)
25997. Chromate Passivation at quenching tank (June 17)
41998. What galvanized sheet grade for 1000 hours salt spray? (June 15)
57860. Fish-boning on galvanized surface (May 21)
38915. Does sulfur content in rolling oil composition affect the galvanizing? open Q. (May 16)
60959. Galvanized Rainwater Goods on Barn of Larch & Douglas Fir (May 8)
21692. Convert 90 GSM coating thickness to microns (May 3)
39461. Black spots in hot dip zinc coated wire (April 17)
44978. Galvanizing kettle furnace and burner design (April 12)
06056. Galvannealed vs. Hot dip galvanized open Q. (April 7)
57163. Galvanizing surface defect (black spots) open Q. (April 6)
57418. Double Dip or Single Dip for Galfan? (April 6)
40753A Moving zinc from old galvanizing kettle to new (March 25)
15958. Hot dip tinning of copper is yellowed open Q. (March 21)
57322. Thick Galvanized Coatings, How to Get, What is Maximum (March 19)
39907. Steps for hot dip galvanizing open Q. (March 17)

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

11740. Black oxide process works on some ferrous materials but not all (June 18)
13935. Black oxide rubs off open Q. (May 28)
11628. Why did most of the part accept bluing except a 3 inch section? open Q. (May 24)
11740. Black Oxide coating for steel (May 12)
05718. Description of Malcolmizing Process open Q. (May 6)
24076. Heat coloring Stainless: Durability of the finish outside (May 3)
36214. Composition of cold blackening solutions for steel, iron, ferrous metal (April 19)


    2g. 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)


3. ORGANIC FINISHING PROCESSES . . .

    3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS

53135. What is the role of CED in phosphating? (April 15)
32574. Having 7 different problems in CED coating open Q. (April 1)

    3b. POWDER COATING

04745. Powder Coating over Galvanized Steel camera open Q. (June 25)
18298. Problems in textured powder coating sheen (June 25)
07268. Silkscreen on Powdercoat adhesion problem open Q. (June 2)
15333. Can I do M.E.K. rub test on just the masking tape to avoid hurting the part? open Q. (May 28)
49514. Problems with powder coating powder caking/clumping open Q. (May 21)
37147. Powder coating reclaim -- does anybody take recycled waste powder? open Q. (May 17)
26699. Powder coating thickness for steel furniture in high humidity (May 16)
32204. Can I import raw aluminum from China and have it Powder Coated in the USA? open Q. (May 2)
42644. Pinhole problems in powder coating open Q. (April 23)

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

14122. Re-anodizing a computer keyboard frame (June 8)
28527. Rainbow defect in vacuum metalizing topcoat (April 2)

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

34465. Pre-coating for sublimation transfers onto ceramic open Q. (May 14)
57718. How to paint on HIPS plastic materials (May 9)
33467. Is there a way to make paint more resistant to heat (April 12)
60877. Does Wash Primer have Hexavalent Chrome? open Q. (March 19)


4. POST-TREATMENTS

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

33081. Blackening won't adhere to nickel electroform open Q. (January 24)
55350. What treatment should we give to pre-galvanized EMT conduit? (January 20)

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

09676. How to solder zinc plated electrical contacts (June 18)
23078. Hydrogen de-embrittlement cycle for fasteners (June 7)
01747. Nickel-chrome plated parts are cracking when hammered open Q. (May 7)
15043. Problems in Annealing of Copper Wire open Q. (March 24)

    4c. STRIPPING, REWORKS, ETC.

24058. Stripping 10 microns of chrome on steel (June 21) vip
38954. Stripping Dry Lube in Welded Area to Prep for E-coating (June 15)
41112. How to remove Powder Coating from aluminum (May 23)


5. SUPPORTING ISSUES

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

12425. Cyanide Wastewater Analytical Result Variations (June 25)
35121. Metal contamination analysis in chrome (June 17)
42472. Hydrogen pick-up test of titanium open Q. (June 15)
41654. Determining nitric acid concentration (May 17)
35573. Chromated zinc parts pass salt spray test per one testing house but not another open Q. (May 1)
40408. How to dissolve stainless steel to estimate manganese? open Q. (May 1)
51596. Interpretation of EDX spectrum result: Weight % vs. Atomic % camera (April 11)
35573. How many salt spray hours for painted structurals? open Q. (April 8)
57140. Analysis & replenishment of passivation solution for stainless steel: nitric acid, chromate, iron (March 10)

     5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

32443. pH of DM water is a mystery (June 20)
41896. High TDS and soluble salt problem in effluent treatment (May 31)
22905. DI water is attacking PVC and Polyethylene Piping (May 24)
39370. Zinc in stormwater runoff (May 23)
49809. Is an RO System necessary for a DM plant? (May 3)
39112. How to wash filter cake? open Q. (April 23)
32578. Chrome plating mist /fume control (April 22)
33660. How to improve pH for DM water open Q. (April 11)
33620. Inexplicable pH drop in boiler blowdown water (April 10)
17230. About CO2 in demineralized water open Q. (April 2)
59691. Sodium Metabisulfite for Water Treatment (March 13)
29294. How much nickel with 304SS pressure cooker leach? open Q. (March 12)

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

14264. Are yellow-green BBQ flame deflectors toxic? open Q. (June 25)
38402. Making tobacco pipes out of copper (June 18)
22369. Do Three 55-gallon drums of vanilla require hazmat endorsement & placards? (June 17)
34002. Dangers/Toxicity of inhaling muriatic acid fumes open Q. (June 14)
28905. Can a delaminated cooking pan be dangerous? open Q. (May 28)
10986. Swallowing Muriatic Acid (May 7)
60955. Is Melchoir safe? (April 23)
02632. Handling cadmium plated parts (April 18)
34155. Removed teflon from pan, but tiny dots remain video(March 28)

    5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

10704. Pump spec for degreasing tank camera (June 18)
11465. Sludge buildup on heating coils in phosphating tank open Q. (June 6)
26187. Will NaOH solution corrode 316SS? (June 6)
01177. Avoiding use of lead in anodizing (June 4)
41678. Preventing damage to plating racks (May 21)
06364. Plating barrel danglers and other maintenance problems (May 2)
41698. Holding work in process for cleaning check without corrosion (March 13)

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

35197. Questions about zinc electroplating specification Ep-Fe/Zn5 open Q. (June 17)
07070. Who does ASTM G32 Cavitation Test? open Q. (April 18)
04379. Phosphoric acid anodizing per ASTM D3933-98 open Q. (April 7)
54825. Is Wash Primer Required for Painting over Cadmium Overplating? open Q. (March 27)
31926. Waterbreak testing (March 13)


    5f. WORLD WIDE WORD OF THE WEEK

49424. Rejects vs. defects (June 19)
26940. What does Sursulf Oxynit mean? (April 12)
60946. Clean and descale per STO110LA0008 open Q. (March 17)

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

10026. WHY aren't trivalent chromates self-healing? (June 3)
11462. Alternatives to trichloroethylene to clean or vapor degrease parts (March 4) vip

    5h. MOSTLY METALLURGY; Heat Treatment

10948. Remove heat treat scale from stainless steel open Q. (June 2)
11874. Annealing Beryllium Copper (BeCu) open Q. (May 30)
28871. Hardening 304 & 316 stainless steel (Austenitic) open Q. (May 16)
21169. Best abrasive disc for cutting stainless steel? open Q. (May 1)
45235. Will stainless discolor to copper color when heated in a vacuum open Q. (April 26)
23834. Is Nital Etch needed if grinding is only Before heat treating? (April 24)
12545. Annealing Stainless Steel open Q. (April 17)
52552. How to make shoes molds from cast iron open Q. (March 25)
00336. Rusting of stainless steel at weld (March 19)
46264. Vacuum Furnace Discoloration of Inconel 718 open Q. (March 11)

    5i. PRECIOUS METAL RECOVERY

22253. Refining of Palladium and making its salt (June 23)
34676. Refined Gold has Iridium in it open Q. (June 19)
33616. Gold Recovery for Dummies open Q. (June 18)
05048. How to Extract Gold from Computer Circuit Boards? open Q. (June 5)
37685. Rhodium plating solution refining open Q. (May 25)
32894. The economics of melting gold bars (May 11)
19529. Refining of silver chloride to silver metal open Q. (May 3)
54096. Can gold be reclaimed from reflective glass? open Q. (April 28)
22867. Are "We Buy Gold" stores reputable? (April 10)


6. CONSUMER, RESEARCH, & STUDENT ISSUES

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

07897. Galvanic compatibility of aluminum gutters and copper roof (June 25)
22551. Does all aluminum cookware these days have non-stick coating? (June 25)
41517. Vermeil quickly turns from yellow to rose/coppery colored (June 24)
21693. Sealing Aluminum to prevent oxidation? (June 23)
19035. Toilet bowl cleaner turned stainless appliances orange (June 22)
57871. How to clean or polish an 18k gold trumpet (June 22)
19039. Cast Iron Cook Stoves: Where to find parts and how to restore open Q. (June 18)
22490. Painting aluminum swimming pool coping open Q. (June 17) br 23038. How to electroplate just the edges of sea shells open Q. (June 17)
38112. Electroplating nickel onto grey cast iron open Q. (June 17)
44569. How much is F.B. Rogers teapot worth? (June 15)
50226. Type 202 SS for outdoor kitchen (June 15)
08096. Brass keyfob tarnishes quickly (June 10)
40018. Ruined black enamel kitchen sink finish open Q. (June 7)
43684. Dulling shiny nickel plated hinges (June 6)
25432. Hobbyist plating of zinc-nickel with black chromate (June 6)
32106. Cleaned engine with HCl and coolant is rusty (June 5)
49883. 14K gold chain turned pink-ish/rose gold-ish (May 30)
30403. TVs at Belize resort have short life due to sargasso / hydrogen sulfide (May 28)
21527. Body chemistry and gold & sterling silver (May 24)
48729. My chrome wheels are peeling (May 24)
28788. How thick is 5X plated gold? open Q. (May 23)
30442. What paint do I use on a metal mailbox? camera (May 23)
53424. Activating and gold plating coins for jewelry (May 23)
16875. Avoiding RV galvanic corrosion damage (May 21)
11353. Does Yellow Zinc Plating need a clear coat? camera open Q. (May 20)
22092. Keum-boo and ruthenium too open Q. (May 20)
02662. Torch blackening of brass open Q. (May 19)
51130. How to remove scratches from stainless with a clear coat on it? (May 19)
35277. How long can brass be buried? (May 17)
09787. Refinishing an antique pie safe open Q. (May 16)
07423. Painting & Ospho camera open Q. (May 15)
40886. Agitation air sizing for electroforming (May 9)
50455. Ruined copper sink with Tarn-X (May 8)
16945. How to keep Corten bench from staining clothes? open Q. (May 8)
31904. Buffing ruined my concrete pavers open Q. (May 7)
60510. Coatings for washing machine basket spiders (May 7)
19226. Want Black Titanium Finish camera (May 5)
15174. Gun Bluing / Cold bluing open Q. (May 3)
30700. How to remove paint/lacquer from silver (April 25)
00085. Problem with Copper electroplating/electroforming (April 23)
51406. Cutting up old fridge door to use as gas barbecue heat shields (April 23)
21436. Removing oxidation from bronze gravemarkers camera open Q. (April 23)
16432. Painting a gas fireplace (April 22)
19833. Rust prevention with Phosphoric Acid (April 18)
12453. Problems in hobby anodizing (April 18)
14075. What Solution for Etching sterling silver? open Q. (April 17)
17968. Speeding up the "living finish" on oil rubbed bronze open Q. (April 17)
15733. Aluminum pretreatment for powder coating of buzzbaits (April 16)
30186. Lime-Away destroyed stainless steel sink (April 15)
33644. Rainbow "oil slick" coating on pottery and plaster items camera open Q. (April 14)
17478. Sealing rusted steel camera open Q. (April 10)
21437. Want colorful patterns on stainless steel (April 10)
09067. Rave hairspray is not working for sublimation coating open Q. (April 9)
06873. Old Japanning Paint Recipe wanted (April 9)
34758. Copper plating staining problems (April 9)
35145. Brass is pink from improper cleaning open Q. (April 8)
01574. How to estimate surface area for anodizing (April 6)
48051. Why is rhodium plating so expensive? (April 4)
58843. Removing gold plating on tungsten carbide ring (April 2)

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

57929. Formula for electroless nickel plating solution open Q. (June 18)
00284. How to etch epoxy for electroless plating? open Q. (June 8)
46268. Does bright gold plating require bright nickel underlayer? (June 6)
13738. Questions about Immersion Plating / Replacement Plating (April 10)
50837. Walls of vacuum chamber became discolored (March 3)

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

04134. Copper sulphate reaction with steel wool (May 6)
27653. How long does it take for pennies to corrode? (April 24)
26899. What metals rust the fastest (April 18)
47743. How long does it take for copper and steel to rust? (April 9)

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

33151. Looking for a magnet that can attract gold (June 23)
12373. Zinc oxide production by French process (June 18)
09128. Citric acid as chelating agent in swimming pool open Q. (June 6)
13393. Preparing sea shells for crafts or display open Q. (May 17)
21381. How to test the Aimpon to find out it if it is fake? (May 9)
44362. Swallowed Sodium Hypochlorite during root canal (April 24)
00283. Is my Kenrick brass door knocker a counterfeit? camera (April 20)
02754. Hanson Van-Winkle Munning (H-VW-M) memories & memorabilia open Q. (April 18)
52212. Cleaning blackened bank notes (March 30)
52413. Can lead anodes be used in hydrogen generator open Q. (March 24)
04902. Sun reflection from windows is melting plastic siding on neighbor's house! camera (March 17)
03096. Shielding your home from a power transformer open Q. (March 17)
17903. Tile contractor's muriatic acid corroded our stainless steel appliances camera (March 10)
13807. Need very high friction non-pneumatic wheel coating for Bonneville Salt Flats car (March 9)

legend:

(    )= Date in parentheses is most recent posting on the thread
open Q.= Thread currently ends with a question or the editor-curator's inconclusive musings
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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