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Technical Categories (this page):
 Process: 0. Corrosion. Compatibility, Choosing a Finish
 Preparation: 1a. Mechanical Prep 1b. Chemical Pretreatments 1c. Masking & Racking
 Inorganic Finishing: 2a. Stainless & Titanium 2b. Anodizing & Light Metals 2c. Electroplating & Electroforming
2d. Electroless Plating 2e. PVD, Vacuum Processes 2f. Galvanizing, Hot Dipping
2g. Black Oxide, Bluing, Coloring 2h. Other Inorganic Finishing Processes
 Organic Finishing: 3a. CED, Electrocoat 3b. Powder Coating 3c. Lacquers, Clearcoats
3d. Painting, Printing, Adhesives
 Post-treatments: 4a. Chemical Post-treatments 4b. Baking & Drying 4c. Stripping, Reworks, etc.
 Supporting Issues: 5a. Analysis, Lab, QA/QC 5b. Water & Wastewater 5c. Safety, Emissions, Toxicity
5d. Plant & Process Engineering 5e. 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. Artists, Hobbyists, DIY 6b. Research, Thesis work 6c. K-12 Science, Elementary to High School
 Not Metal Finishing: 7. Off Topic, but Interesting
RFPs/RFQs
Need finishing services:
Need stainless kitchen hood refinished
[Lavalette NJ 5/31 - open to all]
Coater for Automotive Industry Die Cast Parts
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Need coater to do Surtec 650 or Iridite NCP
[NC 5/21 advertisers-only for 2 weeks]
Arc welding & anodizing
[FL 5/18 - open to all]
Matte Finish on Silver Bullion
[Detroit 5/18 - advertisers-only]
Blast, prime, powder coat aluminum railing
[DE 5/09 - open to all]
Need kitchen table refinished
[Watford (near London) 5/21 - open to all]
worldmap
Finishing shop needs products & services:
Seeking Anodizing Consultant
[GA 5/30 advertisers-only for 2 weeks]
Seeking NADCAP AC7108 Consultant
[CA 4/27 - open to all]
Need PCB Chemicals
[Mumbai 3/24 - open to all]

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

Does Plastlina/modeling clay accelerate corrosion of aluminum? (June 3) open Q.

Microwave Oven Interior Reflective Materials (May 27) open Q.

Inexpensive black electroplated finish? (May 18) open Q.

Best solution to prevent tarnish on silver plated small accessories? (May 16)

34271-6i What are the finishes on this antique clock? (April 30)

Choosing Stainless Steel vs. Galvanized vs. Zinc Plated Fasteners (April 28) open Q.

Zinc-nickel Plating vs. Zinc Flake Dip-Spin Coating (April 21) open Q.

Coating for low electrical resistance, but high corrosion resistance and wear resistance (April 11)

61229i Need conductive material that will bond to stainless steel (March 28)

Plate warps and needs to be stronger and polished (March 23) open Q.

finishing wrought iron How to finish wrought iron railings (March 19)

Repairing titanium shafts by plating or hardcoating (March 8)

Corrosion resistant coating for C45 Material (March 3)

How to protect Beryllium Copper from corrosion by Ammonia (March 1) open Q.

Cr-Mo-V rotor Does bronze corrode Cr-Mo-V steel? (February 17) open Q.

Stainless Steel or Galvanized fasteners for Aluminum Siding (February 17) open Q.

How to avoid rust (February 9)

Which substitute for hard chromium plating? (February 2) open Q.

PTFE thin film coating of 316L Stainless steel parts exposed to sulfuric acid (January 27) open Q.

gold plating on zari thread Alternatives to gold plating for Zari thread (January 24) open Q.

scintillator Building a scintillator. How to get a bright/reflective surface? (January 13)


1. PREPARATION . . .

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

61258i How to polish aluminum steering wheels (June 4)

Black colorant/dye for liquid buffing compound (May 21) open Q.

What is difference between Ramax & Ra (May 3) open Q.

How important is variable speed for a tumbler? (April 8)

Formula for polishing and buffing compounds (March 16)

How to Mirror Finish Alumina Ceramics (March 13)

Need formula to make solid & liquid polishing compound for metal polishing (February 26) open Q.

Looking for linear grinding/finishing tool practical for non-production use open Q. (January 16)

Ra vs. Rz Ra vs. Rz: Ra keeps growing, Rz stays the same? (January 2)

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

Electrochemical etching of Fe Ni Cr AISI steels for "sandblasted" effect (June 8) open Q.

Manganese phosphate: why does spec demand same source for blasting? (June 8)

Zinc Phosphate coating problems (June 4)open Q.

Cleaning copper discoloration from baking (March 30)

Problems and solutions in zinc phosphating (March 25)

How to etch silver without affecting aluminum? (March 5)

phosphating without oiling Want good salt spray hours from phosphating without oil (March 1)

rack marks in plating Rack marks in zinc phosphating open Q. (February 4)

Dip vs. Spray Phosphating (January 11)

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

galvanized and rusted metal art White lines along masked edges when selectively stripping zinc galvanized steel (March 8) open Q.

masking for silver plating 61191i2 Masking for Silver Plating Inside Hollow Aluminum Cylinders (January 24)


2. INORGANIC FINISHING PROCESSES . . .

2a. STAINLESS STEEL & TITANIUM PROCESSING

45849-1i Electropolishing of stainless steel problem: "frosting" (June 8) open Q.

Coloring stainless steel (May 25) open Q.

16927i Coloring round type 304 stainless steel wire permanently (May 20)

Electroless copper vs. Wood's Nickel strike for stainless steel (May 15) open Q.

AMS 2700 Type II Passivation of Stainless Steel (May 14)

5422i Electropolishing of stainless steel -- Q&A, Problems & solutions (April 24)

Hydrofluoric / Nitric acid etching/pickling of P.H. stainless steel (April 23)

How to recognize passivation frosting? (April 8) open Q.

Passivation leaves yellow or brown spots on 303 stainless (March 19)

Oxalate Conversion Coating for Stainless Steel (March 15) open Q.

Amps, Volts, Temp. & Time required for electropolishing? (March 12)

Ferritic stainless steel surface finishing (February 24)

Citric vs. Nitric Acid Passivation of Stainless Steel (February 11)

Electropolish, Passivate, or Chemical Polish 4140 & 4340 Steel? (February 10)

Rinsing after Stainless Steel Passivation (February 4)

electropolishing stainless steel Acids for electropolishing stainless steel (February 3)

Problems with passivation and salt spray testing of 15-5 PH stainless steel (February 1)

Will grit size affect passivation of stainless steel? open Q. (January 29)

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

Room Temperature Hardcoat Anodizing. Additives for Type 2-1/2 (June 9)

Caustic Soda Etch Tank Suddenly Causing Intergranular Attack (June 8) open Q.

De-smutting/De-Oxidizing of aluminum (June 6)

White powder stains when electrocolouring anodized aluminum (June 6) open Q.

Blisters when plating copper onto aluminum (June 6) open Q.

Can sealant surfactants be removed? (June 6)

How durable is the finish on sandblasted aluminum? (June 3) open Q.

Dyed Anodizing Color Matching Q&A, Problems & Solutions (June 2) open Q.

Anode to Cathode Ratio for Electrocoloring of Anodizing (May 30) open Q.

Acid vs. Alkaline Etch before Anodizing or Chem-Filming Aluminum? vipInquirer often helps others, so especially deserves our help (May 30) open Q.

39479i Sulfuric Anodized 2024 Al turning Pink open Q. (May 28)

How to calculate anodizing time for different load sizes (March 24)

61252i Red Rust on Nickel Plating over Aluminum? (May 23)

41531i Black anodize fades in trichlorethylene vapor degreaser (May 23)

61234-1i Dip process for brightening aluminum cookware (May 20)

Is touching up anodized with Alodine/Iridite/Chem-film/Chromate allowed? (May 18) open Q.

45421i Black spots in anodized aluminum profile (May 12) open Q.

Aluminum cathodes for anodizing tanks (May 11)

15018-2i Hard Coat Anodize is Chipping and Flaking (May 10)

Purple type 2 anodizing trouble (May 5)

Sealing Aluminum to prevent oxidation? (May 5)

Anodized aluminum galling situation (May 4) open Q.

61239i Corrosion? on anodized & gold dyed alloy 2024 parts (April 29)

Cause of white spots on dyed 2024 aluminum (April 26) open Q.

MIL-DTL-5541 Type I vs. Type II (TCP) issue (April 23)

26113i Sandblasting and Anodizing Leaves Bright Spot (April 20) open Q.

14229i Brown discoloration after clear anodizing (April 18) open Q.

61225i Pitting in Aluminum Threads after Alodine (April 16)

38488i Problem clear anodizing MIC-6 material (April 16)

What is the Alcoa Alumilite 226 process and what shops offer it? (April 15) open Q.

Electropolishing of aluminum: concentration and chemical make up (April 13)

Electropolishing of Aluminum vs Bright-dip (April 13)

Amps & volts jump around as chromic acid anodizing hits 40 volts (April 12)

Severe erosion anodizing 7075 aluminum (April 4) open Q.

40035i Etching turned Aluminum Black (March 28)

61224i Okay to anodize small loads and largely empty racks? (March 27)

25040i Aluminum bright dip problems (March 19)

44324i2 Beadblasting aluminum plus brite dipping is causing pitting (March 15) open Q.

40796i Problems Black Anodizing 5052 Aluminum (March 15)

Pulse anodizing rectifier settings? (March 14) open Q.

Anodizing Racks: what material of construction? (March 9)

Sudden drop in Alodine concentration (March 5)

Can Cast Aluminum be Anodized? (March 4)

Anodizing Coefficient of Friction? (March 2) open Q.

58771i2 Spotting on aluminum parts with chromate finish (March 1) open Q.

White corrosion on anodized job after salt spray test (February 25)

61215i Numerous Type II Aluminum Anodizing Defects: White Spots, Missing Color, Ink Stains (February 24) open Q.

Anodized Part Absorbs Grease into Oxide Layer Near Edges (February 23) open Q.

Problems with Color of Hardcoat Anodize (February 23)

How to etch and color anodized aluminum (February 18) open Q.

How much air agitation for Hard Anodizing of Aluminum (February 17)

61201i Anodizing seal issue on bead blasted areas (February 17)

Micropitting issue chromate conversion coating of Aluminum (February 15)

2758i How to eliminate anodizing appearance variations (February 9)

Anodizing Color Fades in Autoclave (February 5)

Water stain prevention for aluminum (February 5)

61197i Anodizing Appearance Problem on Silkscreened Panels open Q. (January 27)

Aluminum piping underground. How to do corrosion protection? (January 11)

4408i Dissolved Aluminum in Anodizing bath -- How Much to Have, How to Analyze/Titrate, How to Correct/Adjust It (January 10)

61025i High Dielectric Anodizing of Aluminum (January 6)

19266i Galvanic potential of aluminum after conversion coating (January 4)

2c. ELECTROPLATING and ELECTROFORMING

58336i Cadmium Cyanide Plating Bath Maintenance & Analysis (June 11)

How to tack diamond to workpiece? (June 10) open Q.

Black spots on parts after received by customer: fretting corrosion? (June 6) open Q.

4618-1i Problem in grinding Hard Chrome plating (June 5)

Nickel plating / striking of stainless steel (June 3)

55225i Alkaline zinc plating problem: Black dots/spots that grow with time open Q. (June 3)

Chrome Plating Problems on Gravure Printing Cylinders/Rolls (June 2)

55757i Pits, Stain marks on Nickel Plating (June 12)

Hard chrome plating: Temperature (May 30) open Q.

40095i White patches in acid zinc plating (May 27)

Bright vs. dull cadmium plating (May 26) open Q.

Tin Plating Problem: doesn't take in random areas (May 15) open Q.

Silver plating on aluminum blisters after baking (May 12) open Q.

54543i Silver plating on copper wire is not shiny and white (May 11)

Can electricity "melt" part of the item being plated? (May 9)

Converting rhodium dip plating solution for use in pen plating (May 6) open Q.

Baking electrophoretic lacquer makes copper-nickel plating peel off aluminum (May 6)

Very low tin plating thickness in an hour (May 2)

Suitability of Electroless Nickel for very low service temperature? (April 29) open Q.

Copper Pyrophosphate Delaminating from Strike (April 29)

1871i Hard Chrome plating -- pitting in horizontally plated shaft (April 27) open Q.

Chrome Plating Steel in a Bath Normally Used for Plating Copper (April 22) open Q.

White Patches in Trivalent Chrome Plating (April 22)

41922i Nickel plating white patches and dullness (April 21)

Black spots in zinc plating (April 16)

Current density required for chrome plating (April 16)

Hard Chrome Fails Salt Spray Test if it's Ground (April 15) open Q.

Substitute/Alternate/Replacement for Rhodium Plating (April 14) open Q.

Ingredients for chrome (April 12)

Hard chrome plating problem: dull gray plating (April 8)

Zinc plating thickness for 500-hour salt spray? open Q. (April 8)

61231i Tin Plated Copper parts black smear/residue (April 8) open Q.

Cadmium plating problem: pits, even on Hull Cell panels (April 7)

10282i Marks in tin plated copper bus bar (April 6) open Q.

52602i Zinc plating defects (Quality of metal finishing) (March 30)

Converting zinc plating bath to zinc-nickel (March 29) open Q.

34107i Zinc-plating appearance problems (March 28) open Q.

55155i Cyanide bleedout in Silver Plating of Brass Castings (March 27) open Q.

Zinc plating turns black in weld area (March 26)

Problem holding Zinc concentration in alkaline Zinc plating bath (March 26)

61226i Acid zinc plating is dark grey and black (March 25)

Electroplating with Brass (Electrodeposition of Brass) (March 24)

Installing a black chrome plating plant (March 16) open Q.

Plating chrome on a nickel substrate (March 12)

Peel off problem from semi bright nickel (March 9)

Help repairing chrome cylinder rods (March 8)

49751i White bronze plating problems (March 1) open Q.

44771i2 Acid Copper Plating Problems (March 1) open Q.

Zn blue passivation turns yellowish (March 1) open Q.

3000i Marks and hazy spots after gold plating jewelry (February 26) open Q.

Electroplating of iron onto bismuth shot (February 26) open Q.

Tin plating anode problems (February 25)

35342i White patches in Chrome Plating (February 23) open Q.

44804i Purplish brown discoloration of gold plating (February 23) open Q.

Restoring gold Iridite color to diecast parts (February 21) open Q.

34023i Haze on Ni-Cr plating surface (February 20)

Economical iron electroplating; How to make up ferrous sulfate solution (February 19) open Q.

44143i Chrome plated hydraulic cylinder rods have pits (February 15)

Nickel plating is coming out black (February 15)

What makes up silver plating solution? open Q. (February 15)

Plating of Rare-earth Neodymium Magnets (February 12)open Q. vipInquirer often helps others, so especially deserves help

Alkaline Zinc Nickel Plating of Hardened Steels open Q. (February 9)

Q&A: Tin plated parts turn yellowish (February 4)

What types of plating can be done in a barrel? open Q. (January 30)

52579i Zinc electroplating with yellow passivation is dull open Q. (January 30)

My brass plating is nickel color instead of yellow open Q. (January 29)

Zinc-Nickel Plating is 'silver' color in Black Passivation bath open Q. (January 29)

40243i Plating both outside AND inside of a tube open Q. (January 22)

58478i Tin-Silver Electroplating over Copper Pillar Bump open Q. (January 20)

11191i Manufacturing Process of Nickel Sulphate and Nickel Chloride (January 20)

44964i Black Nickel Bath Formula for Barrel Plating (January 18)

Emissivity value for Cadmium plated steel and Zinc Plated Steel open Q. (January 16)

Can lack of ZnCl2 additions cause chloride zinc roughness? open Q. (January 12)

Hard Chrome Plating Additives? HEEF Advantages? MSA? (January 12)

How thick is the chromate on zinc-nickel plating? open Q. (January 11)

How to do brass plating on stainless steel (January 11)

How much voltage and amperage for barrel acid zinc plating? open Q. (January 11)

9737i Need to touch up Cadmium plate (January 6)

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

No adhesion of Electroless Gold onto Sulphamate Nickel Plating (June 4) open Q.

Poor Adhesion of Electroless nickel on Sulfamate Nickel (May 15) open Q.

Factors affecting Electroless Nickel deposit rate (May 9) open Q.

How to determine plating defect vs. plastic substrate defect (April 24) open Q.

Plating of ABS Plastics; palladium and electroless nickel issues (April 21) open Q.

"Dot Skip" Problem in Plating of ABS Plastic (April 21)

Decomposition/Plate-out of Electroless Nickel Plating Bath (April 5)

What is the wetting agent for silvering of vinyl LP records? (March 30) open Q.

Thermal cycle Test on ABS (March 15) open Q.

39992i Chrome plating peels off of electroless nickel (March 6)

Plating Ultem 2300 and Composite Plastics (March 6) open Q.

Palladium activation for EN Problems & Solutions (February 22) open Q.

Problem doing EN on stainless with only non-magnetic plating (February 10)

Silver plating with silver nitrate open Q. (February 9)

Nickel Plating with Boron Nitride Particles (January 22)

Black Stain in blind & threaded holes of electroless nickel plating (January 15)

Mid Electroless nickel on Brass against an 6000 series Aluminium? open Q. (January 13)

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

PVD Setup for Surgical/Medical Tools (May 16)

Can my jewelry line be vacuum silver plated? (May 16)

How to get Jet Black PVD finish (March 5)

2f. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

Welding of hot dip galvanised kettle (June 11) open Q.

Increase existing GI coating without re-galvanizing (June 3) open Q.

39461i Black spot problem on hot dip galvanized mesh (May 20) open Q.

How to reduce galvalume and galvanizing dross generation (May 14) open Q.

Can Galvanized Steel Be Painted and with Reliably Good Adhesion? (May 11)

Wiping system for continuous wire galvanizing? open Q. (December 19)

12327i Sulfuric Acid Solution Recovery Q&A (April 10) open Q.

How Can I Reduce and Remove Zinc Dross (April 6) open Q.

Need to build a Hot-Dip Galvanizing Kettle (April 2) open Q.

Galvanising - Reduce & Recover Zinc Ash and Dross (March 18) open Q.

Alternatives to hot dip galvanizing for a small shop (March 12)

Titanium and Lead in hot dip galvanising (March 3) open Q.

46006i Rough & lumpy low quality galvanizing (February 22) open Q.

How do we tolerance and gauge galvanized fasteners? open Q. (February 11)

Is galvanized steel appropriate for water/glycol mix? open Q. (February 10)

What degreasing & flux for HDG of lighting poles? (January 26)

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

Black oxide solution with copper contamination (June 4) open Q.

My caustic bluing solutions gets weak (March 10) 2nd Request open Q.

How do you use wax coating at end of Black oxide process open Q. (February 8)

How to make black golf putter heads? (January 30)

Does black oxide add hardness? (January 11)

Best Alternative to Black Oxide Finishing open Q. (January 5)

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

Depletion Gilding, and Tarnish Prevention in low karat metals (May 24) open Q.

Cost Estimating for S442 Zinc-rich Dip-spin Coatings (February 9)


3. ORGANIC FINISHING PROCESSES . . .

3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS

CED System Issues: Recovering paint, Ultrafiltration problems (June 10)

CED Paint conductivity is dropping/rising (June 8) open Q.

Electrocoating: Higher or Lower Solvent for Lower DFT? (May 31) open Q.

Which pumps & membranes are best for CED bath? (April 13) open Q.

Defects in CED Coating (April 12)

How to Increase DFT Paint Thickness in Cathodic Electrodeposition (CED) system? open Q. (March 28)

Sizing an e-coating rectifier (March 9) open Q.

11694i Book or notes for PT CED (February 2)

3b. POWDER COATING

High heat resistance powder coating (April 22) open Q.

How to Powder Coat Plastics (Nylon, ABS, Polycarbonate, Composites) (April 15) open Q.

The best pre-treatment process for Aluminum alloys to be Powder Coated (March 4) open Q.

Aluminum pretreatment for powder coating (March 3) open Q.

Brake caliper coating Q&A: Paint over anodizing & electrocoating? (February 21)

Surface Treatments For Aluminum Concrete Forms (January 29)

Powder coating reclaim -- does anybody take recycled waste powder? (January 15)

Aqua Blasting before Powder Coating open Q. (January 8)

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

Cathodic Electrophoretic Lacquer -- How to get matte black CED (May 21) open Q.

Coatings for metal spectacle frames (March 16) open Q.

Preserving bright copper using benzotriazole solution (March 14) open Q.

28801-1i Applying Colors to Nickel Plating (February 26) RFQ

9711i Clear coating for for exterior steel open Q. (January 22)

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

15909i Training on plastisol chemistry and application? open Q. (June 9)

Sublimation Coating Introduction, FAQs and Q&A

Do we need to clean paintlok ductwork before dryfall painting? (March 4) open Q.

Paints for power transformers (February 19) open Q.

Epoxy bleed-out problem on matrix leadframe open Q. (February 8)

Poor adhesion of paint to aluminum open Q. (January 27)


4. POST-TREATMENTS

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

How to Passivate Copper (March 22) open Q.

20303i Clear and yellow trivalent chromates are fine but green gets white colored spots (March 11) open Q.

Formula for Blue Chromate (Passivation) for Zinc Plating (March 4) open Q.

Chromate conversion on cadmium not adhering (February 11)

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

Soldering Electroless Nickel plated components (June 11)

Why Pre-Bake before cadmium plating? (April 29) open Q.

Should we be baking case hardened parts for Hydrogen Embrittlement? (March 24)

Baked zinc plating vs. zinc without bake (February 12)

4c. STRIPPING, REWORKS, ETC.

Strip paint from aluminum without stripping chromate conversion coating (May 4) open Q.

Hard chrome appears to be immersion depositing during operation (April 28) open Q.

Stripping Cadmium plating and choosing a method (April 17)

Restoring fire-blackened cast brass generator brush-holders (March 11) open Q.


5. SUPPORTING ISSUES

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

Scribe marks on galvanized samples (June 11)

Gage R&R for an XRF plating thickness tester (June 10) open Q.

Analysis of nitric-hydrofluoric aluminum etching mixture (May 12) open Q.

Titrimetric procedure for trivalent and hexavalent chromate analysis (April 22)

Salt spray / salt fog pH variation (May 12) open Q.

Adhesion Tape Testing of Plating (May 2) open Q.

Measure saccharin & butynediol concentration in Nickel sulfamate electroforming bath (April 23)

Looking for a titration method for ferric chloride (April 22) open Q.

Analysis of Rocheltex (cyanide copper) plating solutions (April 22)

Wood's Nickel Strike Bath Analysis & Maintenance (April 19)

Analysis of HNO3 & HF in titanium etch (April 18) open Q.

Interpretation of EDX spectrum result (April 17) open Q.

Adhesion test for chromate conversion on aluminium (April 10) open Q.

Specific gravity of water plus acid mixture? (April 5)

Thickness measurement of plating plus paint (March 9) open Q.

How to Analyze Total Solids in Rinse Water? (March 7) open Q.

Q&As on Operation of ASTM B117 Salt Fog Test Chambers: The Salt Spray Woes open Q. (February 11)

Chrome plating thickness determination open Q. (February 9)

Test for cadmium plating open Q. (January 30)

Lab sink set-up? How to deal with titration waste? open Q. (January 26)

Spot check for testing for Sn on Al substrate? (January 26)

18375i Measuring cadmium plating thickness magnetically open Q. (January 18)

60442i Copper vs. stainless "Stress Tabs" for Electroless Nickel open Q. (January 16)

Salt Spray vs. Humidity Test for Passivated Stainless Steel? open Q. (January 16)

How to calibrate a pH meter for 0.65 and 1.3 pH range (January 10)

5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

Recycling of sodium hydroxide from aluminum etching (May 5) open Q.

Chromium in my Anodizing Waste? (April 19) open Q.

Wastewater: big spike in Carbon Disulfide open Q. (February 15)

34242i Biological/Algae Growth in Tin Plating Rinse Tanks (February 11)

Waste Water Treatment of Silica top coats (January 24)

Wastewater treatment issue: Turbidity problems open Q. (January 19)

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

Risks of chlorine in degreasing tanks in Pretreatment line in paint shop (June 3)

Galvanized chicken wire in popcorn maker (April 17)

Cyanide, its uses and its dangers (April 12)

57138i Safety of heating chrome to 400 °C (April 8)

Will heated copper pipe emit cyanide gas or other toxins? (March 13)

Is it safe to Parkerize cast iron cookware? (March 12)

47195i Toxic Lead and chrome in coffee makers and espresso machines? open Q. (February 20)

Plating Tank Disposal -- What Are the Rules (February 18) open Q.

Cadmium and chromate toxicity/safety from aircraft bolts open Q. (February 7)

Rhodium allergy? open Q. (February 4)

11826i Cause of black mark on skin open Q. (January 21)

5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

Copper Bus Bar Sizing for DC low-voltage high-amperage (June 11) open Q.

Selection of wire for wiring/racking parts (May 23) open Q.

Rock hard scale problem in aluminum processing (May 20) open Q.

12273-1i Aluminum bright dip set-up requirements, material of construction (May 14) open Q.

Does anodizing need explosion-proof electrics due to hydrogen evolution (May 5) open Q.

What happens if Nitric & Sulphuric acids are mixed? (April 30) open Q.

Choosing a plastic for nickel plating line installation (April 20)

Problems in PVC & PVDF piping systems for sodium hypochlorite (bleach) (April 14) open Q.

Hard anodizing chiller sizing (April 9)

RO water causing rust in 316SS spray nozzles (March 25) open Q.

Iridium Coated Titanium Anodes: Sources, Anticipated Life, Applications (February 25)

Flow meters to be used in Tin Electroplating line (February 9)

Looking to purchase a small zinc electroplating system (January 29)

Cleaning/leaching a plating tank (January 19)

7378i Corroded Titanium Anode Baskets in Plating Tank (January 14)

5e. QUESTIONS ABOUT SOFTWARE, SPECS, BOOKS, EDUCATION, INDUSTRY STATS, ETC.

Meanings of plating spec abbreviations: MFZn-Ni, MFZn1c, MFZn2-C, MFZn-1S-2, MFZn8-S, etc. (June 11)

ASTM B-449 and other specs for Chromating Aluminum Q&A's (March 27) open Q.

Testing adhesion of electroless nickel plating (March 27) open Q.

Black oxide over cad plated NAS6604 fasteners? (March 12) open Q.

Overview table of plating and its properties (February 21) open Q.

Looking for a breakdown of spec.: STD3947, Fe/Zn-Fe8c4 open Q. (February 4)

Is Nickel Strike allowed before Cadmium plating heat treated bearing steel? (January 14)

18596i Where to find Dr. Alec Watson's paper on Nickel Sulphamate plating (January 12)

Anodized Aluminum Coating Weight Testing ASTM B137 open Q. (January 8)

5f. W...W...W...WORD OF THE WEEK

Zintec vs. zinc electroplated CRCA steel (June 11)

Finishing Related Basic English Terminology (May 15)

61245i KTL shielding spot technical term (May 12) open Q.

What do "gZn" and "tZn" mean? (April 8) open Q.

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

5h. MOSTLY METALLURGY; Heat Treatment

Powdered metals (Copper) in Los Angeles, CA (March 15) RFQ

Electroformed Nickel Bellows Annealing Process (February 23) open Q.

Hardening EN8 & EN9 parts (February 18) open Q.

Can Powder Coating Affect Heat Treatment or Weaken Aluminum? open Q. (January 12)

5i. PRECIOUS METAL RECOVERY

Problems in recovering gold from soil (June 6) open Q.

33616i Purifying 'smelted computer parts' by re-smelting (June 4) open Q.

Cleaning gold that has been burned 2nd Requestopen Q. (April 24)

Refining of Palladium and making its salt (February 19) open Q.

32894i Melt old gold to make new jewelry open Q. (January 22)


6. CONSUMER, RESEARCH, & STUDENT ISSUES

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

Problems and solutions for copper electroforming (June 9)

38809i Antique baby carriage restorations (June 9) RFQ

Seeking Iridescent Paint or Powder Coating (June 6) open Q.

Neutralizer for acid copper plating? (June 4)

Amperage requirements for plating (June 3)

19047i Wagner Ware (May 31) open Q.

Nickel Plating Brighteners: Everything to Know open Q. (May 29)

Should I cold-galvanize, powder coat, or do both on an anchor mount (May 23) open Q.

cast iron stove parts Cast Iron Cook Stoves: Where to find parts and how to restore (May 23) open Q.

Chrome plated 1950s dinette tables and chairs -- restoring & protecting (May 14)

Blue/green/verdigris patinas for zinc Q&A (May 6)

Base for bathroom faucets is corroded and needs painting (April 30) open Q.

Change my white gold ring to yellow gold (April 26)

How to tell hard anodizing from regular? (April 26) open Q.

Plating the inside of a gas tank (April 25) open Q.

46670i Acrylic Tub Damaged by Drain Cleaner (April 22)

34821i Gold Plating of Fancy Bathroom Fixtures (April 22) open Q.

30103i Making a dark black watch dial (April 20) open Q.

Home nickel plating with vinegar and salt (April 17)

Can nickel plating fill pit and scratches (April 14)

Design Project: Recycling Copper through Electroforming/Plating (April 10) open Q.

39401i Remove copper-nickel cladding from copper core coins? (April 9)

44569i F.B. Rogers Item -- What Is It? (April 8)

How to turn copper aesthetically green (April 7)

36471i Tea Service: Sterling or Silverplate? (April 1)

yellow brass turned pink Help, my yellow brass turned pink (March 26)

Do It Yourself Nickel Plating onto Steel (March 26)

Clear coating of Silver for Anti-tarnish (March 25) open Q.

34112i Steel vs. aluminum patio furniture: corrosion resistance? (March 24) open Q.

Artistic painting with anodizing (March 18) open Q.

Gluing to Polypropylene? (March 10) open Q.

Galvanic Reaction between stainless sink and zinc washers (March 8)

Green fingers from gold rings (March 7)

Iron Plating (Electrodeposition of Iron onto other materials) (March 6)

Need relining/re-tinning of copper pots & pans -- or tell me how to (March 5)

Remove rust with muriatic acid (HCl / hydrochloric acid) (March 5)

patina on copper electroforms Mystery patina on copper electroforms (March 5)

zinc electroplating for science project Zinc electroplating for hobbyists and school projects open Q. (March 4)

tinting headlights How to tint headlight metalizing? (March 3) open Q.

How to make Pewter Shiny? (February 26)

Need Dupont Lucite Acrylic Lacquer paint (February 25)

barber chair replating Replating of barber chairs (February 23)

Silver Plating turning pink (February 23) open Q.

What chemical will heat water to melt ice? (February 22) open Q.

How to Fix mercury damage to gold jewelry (February 20)

Removal of clearcoat on copper (February 15)

making nickel acetate Trying to make Nickel Acetate D-I-Y (February 14)

Restore/repair black porcelain sink finish (February 8)

removing paint from deep corners Paint removal in corners of wood door (February 1)

Copper Plating from an Ammonia Solution (January 31)

Preparing acid copper brightener (January 30)

zincating of aluminum Zincate formulas for plating on aluminum open Q. (January 30)

how to rust nickel plating Can I do 'rusting process' on nickel plated items? open Q. (January 27)

copper tarnish problems Removing tarnish on brass & copper open Q. (January 27)`

cast iron stoves Restoring rusty cast iron wood stove, painting or polishing it (January 23)

gold colored pewter How to fix pewter that turned gold color open Q. (January 20)

relining a bottle cooler Can I rubber line a bottle cooler? (January 20)

Lacquering / clear coating a Brass Bed (January 18)

diy anodizing Home Anodizing (January 18)

Boiling water seal for home anodizing? open Q. (January 18)

High strength fastener Q&A's, Issues & Answers open Q. (January 16)

Paint/powder coat Aluminum Wheelchair Q&A's (January 14)

Stripping a faucet down to raw brass open Q. (January 13)

cleaning jere sculptures How to clean Birds in Flight metal sculpture open Q. (January 13)

Pre-coating for sublimation transfers onto ceramic (January 11)

How to electroplate Aluminum onto Aluminum (January 10)

Yellow Chromate Adhesion Problem (January 6)

Rash from Ring? Fixed by Boiling in Vinegar & Peroxide! (January 5)

Demi-fine gold plating of jewelry open Q. (January 5)

fixing copper sinks Restoring the dark brown finish to copper sinks (January 4)

How to Blue / Blacken Brass open Q. (January 3)

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

How can electroplating cathode current have efficiency less than or more than 100%? (May 21)

Can't understand difference between hard chrome and decorative (April 21)

High strength bolt testing (April 20) open Q.

How to make Zinc Chloride (February 21) open Q.

Electroforming of Copper Foil open Q. (January 10)

Teflon coating of stainless steel open Q. (January 2)

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

precipitate in copper plating Science Project: White Precipitate in Copper Plating? (February 22) open Q.

Science project on the effect of SALT & WATER on steel wool (February 4)


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

11377i Taking antique brass bed apart (June 11) open Q.

Accidentally Swallowing Sodium Hypochlorite during root canal (June 7)

Zinc oxide production by French process (June 6)

How to do bottle cap tables and bartops with pourable epoxy (May 21) open Q.

29370i Identifying rings: Marking system for rings (May 20) open Q.

61249i Corrosion/calcification of ladders, boilers, and brains (May 18) open Q. vipInquirer often helps others, so especially deserves our help

FB Rogers trademarks/insignia on Vases, Crumb Catchers, etc. (May 18)

33143i Stiffel lamps: How to repair Q&A's (May 11) open Q.

32413i Need sweet spirits of nitre (May 6)

Hydrolysis and HHO hydrogen energy for cars (April 16)

7137i Cleaning Dirilyte Gold-tone Flatware (April 16)

Silver extraction from waste hypo/fixer solution (April 16) open Q.

Ceramic Tile Cleaning with muriatic acid (April 12)

Freezer section of my fridge oozes orange goo (April 12)

Why is Panchlok statue made of 51 grams of each metal? (April 4) open Q.

hanson-van winkle-munning Hanson Van-Winkle Munning (H-VW-M) memories & memorabilia (April 4)

Antique icebox Q&A's, Problems & Solutions (March 30)

8792i What is 'Kelite'? The Kelite Bldg. in Los Angeles (March 27) open Q.

Maple Syrup Boiling / Evaporator Pans (February 25) open Q.

frozen zipper Fix frozen zipper stuck from salt spray or corrosion (January 12)

Mill Scale Uses and Applications open Q. (January 5)



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