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0. CORROSION, COMPATIBILITY, CHOOSING A FINISH . . .
• Black stainless steel fasteners for exterior automotive use - May 22
• Sulfamic Acid compatibility with galvanized or copper finishes - May 21
• Need aluminum to be copper colored
RFQ:Phoenix, AZ - March 28
• Chromate on bare steel open Q. - March 22
• Internal hydraulic tank rust prevention - March 22
• Stainless steel grades suitable for very dilute salt water? - March 21
• What would make Brass magnetic? - March 20
• Electroplating onto phosphated steel parts - March 9
• Proper fastener material for Ti plate to Aluminum Extrusion?
- February 19
• Coloring Nickel Plating, like red or blue
open Q. - January 26
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1. PREPARATION . . .
1a. MECHANICAL PREP [GRINDING, POLISHING, VIBRATORY FINISHING, BUFFING, HONING]
• Vibratory polishing of stainless steel components - May 15
• De-rusting/De-scaling of Heat Treated Parts open Q. - February 28
• Difference between Ra and Rc - surface roughness
- January 26
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1b. PRETREATMENTS [CLEANING, PICKLING, ETCHING, PHOSPHATIZING, ACTIVATION]
• Formula for phosphating chemicals open Q. - May 7
• Phosphating chemical problem
open Q. - April 28
• Chrome-sulfuric bright dipping of Brass dulls as it cools 2nd Rqst - April 28
• Turbulent flow in strip-line electrolytic cleaner? open Q. - March 9
• Need Macro-Etch Chemical Process Consultant RFQ: Ohio - March 2
• Electropolishing the inside of a long tube - February 27
• Zinc Phosphate coating problems & issues; Q&A's open Q. - February 11
• Boiling Diamonds in Acid to Clean Them open Q. - February 7
• Manganese Phosphate coating color uneven, and not taking in spots
- February 7
• Want good salt spray hours from phosphating without oil - February 6
• Pickling & passivating of welded carbon steel pipe open Q. - January 19
• Need details of 'the 7-tank process - January 16
• Coating Weight Specs. How to increase/decrease zinc phosphate coating weight
- January 4
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1c. MASKING, RACKING, TAPING, PLUGGING, PHOTOSENSITIVE MASKS
adv.

• How to selectively patina copper (darken it) - April 18
• Best Masking Materials & Methods for Aluminum Anodizing - February 11
• Masking material / method for electroless nickel plating - February 8
• Need TURCO 5580-G masking product
- February 6
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2. METALLIC & INORGANIC FINISHING . . .
2a. STAINLESS STEEL & TITANIUM PROCESSING
• Haziness or Cloudiness on Type III Anodized Titanium
- June 2
• Rectifier (power supply) choice for anodizing titanium? open Q. - May 25
• Anodizing Titanium: electrolyte formula - May 21
• 303 Stainless Steel Passivation Discoloration
- May 3
• Giving Stainless Steel an Aged Brass Look
open Q. - April 19
• Etching titanium to produce crystalline finish?
- April 15
• Reduce discolorations on cold-headed 18-8 stainless screws
- April 14
• Current density & Voltage for Type 2 anodizing of titanium - April 11
• Blackening process for stainless steel chainmail open Q. - April 7
• Phosphoric acid & sulfuric acid electropolishing of stainless steel open Q. - April 4
• Racking material to be used for Titanium anodizing? open Q. - March 27
• Passivation Stains on 17-4 PH Stainless Steel
- March 9
• Electropolishing with citric acid - February 19
• Electrolytic etching of titanium - February 11
• Electropolishing/deburring of hypodermic needles - January 10
• Stainless steel laser etch and passivation Q&A
- January 10
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2b. ANODIZING AND LIGHT METAL TREATMENTS (Aluminum, Magnesium)
• Crazing/cracking of anodizing from baking powder coating
- June 2
• Looking for lab for corrosion testing of MIL-DTL-5541 samples RFQ: Jacksonville, Fl - May 22
• Electrical Resistance/Conductivity Testing of MIL DTL-5541 Chromate open Q. - May 23
• Need 'perfect' yellow chromate conversion coating - May 23
• Aluminium Wire Rod Surface Problem open Q. - May 16
• Not very successful yet at anodizing - May 12
• Corrosion of anodized 7075 T73 vs 7075 T6 aluminum open Q. - May 5
• Alkaline Etching Bath gets used up really fast - May 3
• Touching up anodizing with Alodine/Iridite/Chem-film/Chromate open Q. - April 27
• Sandblasting of aluminum diecastings - April 27
• Alodine is too dark! - April 26
• Customer wants bright black anodizing on ADC12 - April 14
• Problems achieving shiny/glossy anodizing - March 23
• Anodized Aluminium edges not taking dye very well
- March 20
• "Neutralizing" sulphuric anodizing solution with nitric acid - March 5
• Bulk anodizing for aerospace
open Q. - March 2
• Need black anodizing that is UV-proof - March 1
• Bright dip stains the aluminum with grain pattern - March 1
• Roller for adhesion test for chromate conversion coating - February 26
• Problems in cold sealing of anodized aluminum
- February 25
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2c. ELECTROPLATING and ELECTROFORMING
• Copper plating steel grounding (earthing) rods - June 4
• Iron Plating problems (Electrodeposition of Iron onto other materials) open Q. - May 27
• Plating zinc onto stainless steel? - May 26
• Formulation for blue nickel plating open Q. - May 25
• Higher boric acid reduces dog-bone in nickel plating open Q. - May 24
• Applying a color onto a Zinc Die Casting open Q. - May 24
• Understanding Duplex & Triplex Nickel Plating Process - May 22
• Sulfite gold plating -- Problems & Solutions, Q&A open Q. - May 20
• Zinc Plating with Blue Chromate is turning yellow - May 20
• Hard Chrome Plating Failures on Boat Lift Hydraulic Cylinders
- May 17
• Discoloration and blackish marks on cyanide copper open Q. - May 17
• Black spots in cyanide copper plating open Q. - May 15
• Cracks on hard chrome plated spools open Q. - May 15
• Repair gravure cylinder with brush plated copper
open Q. - May 15
• Plating zinc diecast (Zamak-3): Process sequence? - May 5
• Parting/passivation Agents to Keep Electroforms from Sticking to Cathode/mandrels - May 3
• Chrome Plating Problems on Gravure Printing Cylinders/Rolls
open Q. - April 28
• White Rust on Zinc Plated Bolts after 19 hrs neutral salt spray
- April 26
• Tarnishing of tin plating - April 23
• Hydrogen embrittlement in cadmium plating - April 20
• Plating conductive microfibers embedded in ABS - April 14
• Anode to Cathode Ratio. Nickel Buildup In Bright Nickel Solutions - April 12
• Want very dull nickel plating on brass jewellery - open Q. - April 11
• Alkaline Zinc Plating Problem: Delayed Blistering on Steel Parts open Q. - April 11
• Current required in hard chrome plating? open Q. - April 7
• Black Zinc-Nickel Plating has poor corrosion resistance open Q. - April 7
• Chloride Nickel Plating is black and burned.
open Q. - April 6
• Zinc Plating on 12L14 carbon Steel (Blistering & Flaking Problems) - April 4
• Small parts coupling together in MSA Sn (Tin Plating) bath - April 2
• Nickel plating on aluminum contains phosphorous - March 31
• Rough Titanium Cadmium plate open Q. - March 27
• My acid copper plating bath is very slow - March 27
• Nickel plated sockets are cloudy/milky without a copper preplate
open Q. - March 22
• Partial Plating of Chrome on copper base cylinder
open Q. - March 20
• Some problems in Zinc-Nickel Plating
- March 20
• Zinc plating with chromate: is temperature causing the corrosion? - March 18
• Platinum plating on silver Q&A Problems & Solutions - March 18
• Brighteners used in Silver Plating bath open Q. - March 10
• Blisters in Nickel Plating after Heat Treatment open Q. - March 10
• Need Ductility in Nickel Electroplate - March 6
• Nickel Carbonate not Dissolving open Q. - March 2
• Wood's Nickel Strike Bath Analysis & Maintenance - March 2
• Brass plating peels off -- Q&A, Problems & Solutions - March 2
• Non uniform thickness problem in electroplating - March 1
• Gold isn't bright when plating leaded stained glass
- March 1
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2d. ELECTROLESS PLATING, PLATING ON PLASTICS, IMMERSION PLATING, CHROME-LOOK SPRAYS, LIQUID METAL COATINGS
• Mirror finish spray chrome paint: topcoat yellowing open Q. - May 12
• Electroless nickel plating on copper Q&A - April 14
• How does "Rub-on Tin plating" work? - March 29
• Plating Electroless nickel onto stainless steel powders - February 28
• Hydrogen Embrittlement vs. Electroless Nickel Plating - February 11
• Spray chroming with silver nitrate
- January 3
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2e. PVD, CVD, ION IMPLANTATION, VACUUM PROCESSES
• PVD coatings: color control
open Q. - March 25
• PVD gold color control and matching
open Q. - February 14
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2f. GALVANIZING, ALUMINIZING, HOT TIN DIPPING
• GSM to Microns. Converting galvanizing weight to thickness - June 2
• Shop problems in Galfan process (galvanizing with 5% aluminum) open Q. - May 26
• Galvanizing high silicon steel open Q. - May 15
• Can pad wiping be used when galvanising fine wire? open Q. - May 9
• Reduce Iron (Fe) in Galvanizing flux - May 4
• Galvanising - Reduce & Recover Zinc Ash and Zinc Dross - April 14
• What galvanizing weight for purlins in Hawaii - April 6
• Yellow scale on hot dip galvanized surface
open Q. - March 30
• Reduce & Remove Zinc Dross in Wire Galvanizing - March 27
• Want to do Hot Dip Galvanizing Off and On - February 24
• Zinc adherence defect on edges of galvanized steel sheet open Q. - February 19
• Galvanizing defects: black spots, lumps, streaks
open Q. - February 17
• Hot dip galvanizing flux Q & A's
- February 17
• Hand re-tinning of copper cooking utensils? open Q. - January 31
• Safety in a Zinc hot-dip galvanizing process open Q. - January 26
• Can stainless steel be hot dip galvanized? open Q. - January 9
• Galvanizing flux bath has iron contamination
- January 8
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2g. BLACK OXIDE, BLUING, COLORING, PATINAS, NITRIDING
• Possible to black oxide Inconel? - May 14
• Blackening formulas for steel and cast iron - April 29
• Black Oxide poor coverage on welded part open Q. - April 7
• How often must cold black oxide bath be replaced? open Q. - April 6
• Does black oxide on stainless fasteners improve resistance to galling?
open Q. - February 9
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2h. OTHER INORGANIC FINISHING: Mechanical Plating, QPQ, Metal Spray, Zinc-rich Dip-Spin Coatings, Sherardizing, etc.
• Sursulf Processing Q&A, Problems & Solutions open Q. - April 4
3. ORGANIC FINISHING [PAINT, POWDER COATING] . . .
3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS
• Why does zinc & cathodic e-coat lose adhesion after humidity test?
open Q. - March 8
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3b. POWDER COATING
• What Neon Powder Coating for Outdoor Aluminum Sculpture open Q. - April 24
• Industry specs for powder coating thickness and testing methods? - March 30
• Chromated & Powder coated ADC12 Aluminum doesn't pass 366-hour salt spray test
open Q. - January 31
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3c. LACQUERS, CLEAR COATS, ELECTROPHORETIC TINTING, ANTI-TARNISH
• Need longer-lasting lacquer for gold plating - April 19
• E-Coating Zinc Alloys -- Q&A; Problems & Solutions open Q. - March 6
• DFT problems in CED
open Q. - February 18
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3d. PAINTING, PRINTING, ADHESIVES AND OTHER ORGANIC COATINGS
• Does Ford WSS-M3P36-A2 (Green) make sense? open Q. - April 19
• Painting plastic imitation wicker furniture? open Q. - March 8
• Need Formula for NC Thinner & Auto Thinner
open Q. - February 25
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4. POST-TREATMENTS
4a. CHEMICAL POST-TREATMENTS [CHROMATE CONVERSION COATINGS, RUST PREVENTATIVES, PATINAS, COLORIZING]
• Black chromate on cadmium rubs right off - May 3
• Bright Dipping of Brass: some shop problems - April 25
• Visual appearance of Tarniban liquid (silver anti-tarnish) open Q. - March 28
• Chromate conversion on cadmium not adhering
open Q. - March 24
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4b. BAKING AND NON-CHEMICAL POST-TREATMENTS [HYDROGEN EMBRITTLEMENT AND DE-EMBRITTLEMENT, ANNEALING, WHISKERS, SOLDERING, REFLOWING]
• Post Cadmium Plating Tarnish from Baking open Q. - March 2
• Reflow of Tin-Lead Solder open Q. - March 2
• Matte tin turns into bright with reflow open Q. - January 12
• Are tiny solid blobs of tin detrimental to PCB?
open Q. - January 4
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4c. STRIPPING, REWORKS, ETC.
• I need nickel stripping salt composition - May 27
• Removing/Stripping Electroless Nickel Plating from Steel - May 23
• Safe & effective chemical removal of powder coating open Q. - April 29
• Removing chrome plating from plastic (ABS) parts open Q. - March 6
• Nickel plating on brass parts looks layered.
- March 3
• What chemical is safe, cheap & best to remove zinc coating?
- February 12
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5. SUPPORTING ISSUES
5a. ANALYSIS, LAB TECHNIQUE, Q.A., SALT SPRAY TESTING
• G155 Weathering Cycle for MIL-PRF-8625F open Q. - April 28
• Clarification on MIL-DTL-5541F Coating Weight open Q. - April 28
• Hull Cell Test on Cadmium solution - April 20
• How to treat Acid Zinc bath contaminated by dissolved Titanium baskets? - April 16
• Free chromium analysis in pretreatment tank open Q. - April 14
• Titration methods for electrocoloring and seal tanks? open Q. - April 13
• Analyzing for iron in HCl pickling acid - April 12
• Carrier Analysis in Acid Zinc Plating Solutions open Q. - April 6
• Brightness measurement vs. surface finish - March 31
• Hull Cell Test for Cadmium Plating
open Q. - March 13
• How to know 304 vs. 316 Stainless; tests & suggestions - March 1
• Can I use NaOH solution instead of NaCl in Salt Spray test? - February 21
• Silver plating: atomic absorption analysis of silver open Q. - February 19
• ASTM B117 Salt Fog Test Chamber Operational Q&As, Problems: Salt Spray Woes - February 10
• Determine % Nitric Acid. Titration? open Q. - February 6
• Taber ASTM D 4060: conditioning aluminum coupons open Q. - February 4
• Fluoride analysis in HF/Nitric (etch for titanium) - January 30
• Maintaining and Monitoring Acid Copper brighteners open Q. - January 17
• Analyze for iron content in hydrochloric acid
- January 4
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5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL
• Removing Chrome Contamination from Glycol Cooling Loop - May 27
• Using waste pickle liquor (ferrous chloride & hydrochloric acid) to break an oil-in-water emulsion - May 22
• Ion Exchange / DM plant calculations open Q. - April 29
• Algae/Fungus/Biological Growth in Plating & Anodizing Rinse Tanks open Q. - April 22
• Filter to take zinc out of drain water so galvanized parts can be washed open Q. - April 11
• Cost of demineralizing water ("price per ton of water") open Q. - April 3
• High COD mixed bed polisher regeneration effluent open Q. - March 31
• Portable DI water columns fade at customer, but are fine when re-tested - March 28
• Cyanide Disposal/Destruction for school lab - March 11
• How to electrowin/recover copper (plating waste) open Q. - March 2
• Caustic & aluminum recovery from cleaning processes - February 21
• Recovery of copper from electroplating & etching solutions
open Q. - January 19
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5c. SAFETY ISSUES, EMISSIONS, TOXICITY, ENVIRONMENTAL IMPACTS
• Shellfish Allergy vs. Diatomaceous Earth? open Q. - April 15
• Microwave Oven Problems & Solutions: Interior Reflective Materials open Q. - March 28
• Remove Teflon coating from Visions & Pyrex Cookware - March 14
• Is corrosion in copper water vessel hazardous?
- March 10
• Inhaled fumes from Bleach and C.L.R. accidentally mixed - February 26
• Is worn silverware a Health Hazard open Q. - February 2
• Does my silver plated flatware contain lead? open Q. - January 16
• Sick from welding galvanized steel
- January 16
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5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION
• Build hard chrome plating plant for rifled barrels RFQ: Bangalore - May 23
• Shot Blasting - Dust Collector Problems open Q. - April 28
• Electroless nickel plating tanks: Protection of stainless steel from plate-out open Q. - April 18
• Exhaust methods & calculations for plating tanks
open Q. - April 17
• Passivating electroless nickel tanks; anodic protection systems
- March 1
• FRP to protect "tub" from hot temperatures, pressure, rust and leaking? - February 28
• Chemical cleaning of boilers and inhibitors open Q. - February 26
• Concrete tank for zinc phosphate? - February 23
• Designing a Copper Refining Plant open Q. - February 19
• Hydrogen "Explosions" in Plating, Anodizing open Q. - February 8
• Titanium anode baskets get copper buildup in Rochelle Copper Plating - February 3
• Need design assistance on French process zinc oxide furnace RFQ: So. Africa - January 16
• Avoiding Tank Overflows in Plating Shop
- January 13
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5e. QUESTIONS ABOUT SOFTWARE, SPECS, BOOKS, EDUCATION, INDUSTRY STATS, ETC.
• Explanation of plating spec HHS: 201 open Q. - May 22
• Standard for required silver plating thickness vs. current open Q. - May 18
• "Good Days and Bad Days", Part IV, Cost and pricing, by Milton Weiner - May 7
• Need book: Electrolytic and Chemical Conversion Coatings by Biestek - April 17
• MFZn8-CF open Q. - March 24
• Alkaline Anodizing Titanium per AMS 2488 open Q. - March 2
• International standards for phosphating processes
open Q. - February 4
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5f. W...W...W...WORD OF THE WEEK
• What is the definition of "Metallurgical Bonding"? - May 5
• 14 ga. CRS, Zinc Electroplate 0.030" THN? Huh? open Q. - April 18
• Thickness of CMS-02 or F4383 type T3? open Q. - March 15
• What is the Helodor 100 process
open Q. - March 10
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5g. MOSTLY METALLURGY; Heat Treatment
• Problems in Annealing of Copper Wire open Q. - January 26
• Is 6063 aluminum a precipitation hardening alloy? open Q. - January 11
• 316L Stainless is too spring-y
- January 3
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5h. PRECIOUS METAL RECOVERY
• Is this ore/rock Platinum, Palladium & Rhodium?
- May 23
• Recovery of fine floating gold open Q. - March 29
• How can I produce rhodium sulfate in lab? open Q. - March 4
• Acid testing for silver & precious metals open Q. - February 19
• Specific gravity table for gold
open Q. - January 16
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6. NON-INDUSTRIAL ISSUES
Hobbyists, DIY, Around Home
• Restore dark brass doorknobs - June 4
• Muriatic Acid for Fuel tank cleaning? - May 27
• Dissolve Steel Screw and NOT Gold in a Watch - May 26
• Cleaning Dirilyte Gold-tone Flatware - May 24
• Copper table lost its blackening -- how to re-apply? - May 20
• Need paint for stove top - May 20
• Remove oven cleaner damage from aluminum open Q. - May 18
• Gas tank rust removal methods open Q. - May 15
• Plating thick copper layer; using plating to cold weld items together
- May 12
• Pre-coating for sublimation transfers onto ceramic open Q. - May 9
• Concrete Stain for Asphalt Shingles? open Q. - May 7
• How to glue copper pennies together open Q. - May 3
• How to remove chrome plating peeling off of rims! - May 3
• Washing-up tools exposed to plating solutions open Q. - April 28
• Matching shades on polished and unpolished areas of brass bed?
- April 29
• How To Decoratively Rust Metal like Jingle Bells & Safety Pins open Q. - April 22
• Preparing acid copper brighteners - April 18
• How to Antique or Blacken Gold rings and jewelry - April 13
• Pyrophosphate and non-cyanide copper strike/plating process problems & solutions - April 12
• Fasteners replated in yellow zinc for my car are randomly shiny or dull
- April 12
• Looking for "NicSand" Aluminum Oxide Sanding Gel - April 11
• Galvanic Compatibility of Aluminum and Copper open Q. - April 2
• Restore Silver damaged by bleach ... toothpaste is the answer - March 30
• Need Gillespie Antique Restorer - March 28
• I like the pink on the brass. Will it stay?
- March 27
• Brown heat mark on refrigerator
- March 25
• How can I coat for sublimation printing on a low budget? - March 25
• Grout cleaner stains on my stainless steel fridge! open Q. - March 24
• Blackening stainless steel without using Potassium dichromate? - March 21
• Copper plating onto Silver - March 21
• What could be causing the pitting and corroding to chrome fixtures - March 15
• Stripping plating from welding clamps leaves them copper color - March 15
• How to turn 18-8 fasteners black? - March 13
• Need help painting brass! open Q. - March 10
• How to get beautiful galaxy-like vintage finish on pot lids?
- March 10
• Geneva Metal Kitchen Cabinets: Painting, Removing Dents, Parts open Q. - March 9
• Remove tin plating from copper pots, trays, cookware - March 6
• Best type of clearcoat for wheel application? open Q. - March 6
• Clear coat sealer/varnish safe for birds? - March 5
• How to paint screw heads
- March 2
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6b. RESEARCH, THESIS TOPICS, UNIVERSITY & POST-GRAD STUDENTS
• Electroless silver plating on ABS - May 22
• Understanding Duplex Nickel Plating Process - May 21
• How are leveling and Throwing Power Related? - May 16
• Are two layers of gold plating better than one - April 14
• How do I make citric-based copper plating smooth - April 4
• Electrodeposition of Molybdenum - March 29
• Why can we copper plate iron/steel in alkaline solution but not acid? - March 14
• Nickel plates okay in one barrel, but not another
- March 14
• Trouble with Concentration Calculations - February 20
• Electroless Nickel: need intro and technical info
- January 31
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6c. K-12 Science Projects, Grammar & High School Student Questions
• Copper sulfate kills/destroys algae how? - June 2
• Explain lime with steel nails experiment open Q. - April 29
• Why does tarnished penny weigh less than shiny one - January 28
• Science project: To rust and trust
- January 6
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6d. The Artists' Corner
• Removing tar from copper flashing - May 3
• Decorative plating for classic zinc-clad desk?
- April 3
• Repaint Cast Iron Statue from "The Little Chapel" in Guernsey
- February 28
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7. DRIFTED OFF FINISHING, BUT INTERESTING :-)
• Sedgwick Residential Elevators Parts and Maintenance RFQ: Vermont - June 2
• Fixing Brown Rusty Water (Excess Iron) in Swimming Pool Water - June 1
• Copper Sulphate as Swimming Pool Algae Remedy? - May 22
• How to identify old brass, copper, bronze, cast iron lamps?
open Q. - May 20
• FB Rogers Silver Co. -- Is it Sterling or Plated - May 17
• Identifying rings/hallmarks: "AD" hallmark
open Q. - May 15
• Exposed HDPE Pipe - UV Protection with Carbon Black? open Q. - May 12
• Stiffel lamp cleaning, refinishing, replating Q&A's open Q. - May 7
• Cast Iron Cook Stoves: restoration hints open Q. - May 7
• Stiffel lamps repair Q&A's - May 7
• Fix frozen zipper stuck from salt spray or corrosion
- April 30
• Connecticut Trolley Museum's Art Deco Wood Burning Stove
open Q. - April 28
• Maker's mark: Hammer head and face silhouette
- April 26
• Mother of pearl button collection molding away. - April 19
• National Cash Registers: How to Restore & Refinish open Q. - April 5
• Theda Sterling Silver Medals, Crosses, Jewelry Q&A
- March 4
• About sweet spirits of nitre (the traditional folk medicine)
- February 25
• Brass Finishers in the 1800's open Q. - February 23
• Best pipe for natural gas lines: Copper vs. steel, plastic, CSST, etc. - February 19
• Barber Chair Restoration Q&A's and Successes
open Q. - February 13
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