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• Durable, Conductive, RoHS Aluminum Coating Suggestions open Q. - May 16

• Chromate conversion coat Zamac 3 directly vs. zinc plate first? open Q. - May 14

• Hot-dip galvanising alternatives - March 14

• Thin dense chrome vs titanium nitride? - March 12

• Hot Dip Galvanize vs. Zinc Electroplating - March 8

• Why don't air conditioner condensers suffer galvanic corrosion from aluminum fins on copper tubing? (February 11)

• What VDI Finish is required for light pipes? open Q. - May 12

• How to dull a stainless steel finish - May 9

• Need to do Deburring of Titanium RFQ San Luis Obispo CA - April 27

• Problems with stainless steel cut wire media in magnetic tumbler Thanks! Resolved :-) - April 13

• Superfinishing Stainless Steel - March 17

• Profilometer vs. surface comparator for castings - March 4

• How to clean steel contaminated with Sodium Metabisulfite. open Q. (February 5)

• Want to make alkaline ball burnishing compound open Q. - May 23 TODAY

• Can't phosphate high carbon steel open Q. - May 23 TODAY

• Bright dip for Fe-Cr-Al Alloy wire? open Q. - May 16

• Zinc Phosphating Problem: Yellow Staining open Q. - May 13

• Can the same surface treatment line be used for different substrates - May 12

• Why do we use 15-18% HCl for pickling - May 4

• Manganese phosphate coating absent on soft nitrided parts - May 4

• Manganese phosphate coating: issues and answers - May 4

• Why 'acid activate' copper before plating, and how? - April 17

• Need details of 'the 7-tank process' open Q. - April 6

• Manganese Phosphate Components have a red cast - April 1

• Trichloroethylene/TCE in Metal Finishing - March 29

• Free and total acidity in phosphating - March 27

• What is the difference between electrocleaning and electropolishing? - March 23

• Electropolishing of Tungsten Carbide open Q. - March 7

• Surface Activation for Phosphating - March 2

• Zinc Phosphate coating problems & issues; Q&A's open Q. (February 11)

• Tape is causing Anodizing defects - May 12

• Masking material / method for electroless nickel plating - March 17

• How to Mask for Hardcoat Anodize - March 16

• 304 Stainless Steel for Liquor Decanter open Q. - May 19

• Does passivated 304 offer same corrosion protection as regular 316? - May 16

• Electropolish inside of SS304 Pipe open Q. - May 13

• Annealed & passivated stainless parts fail water immersion test - May 12

• 'Frosted marks' from electropolishing? open Q. - May 10

• Anodizing of titanium: Type II alkaline RFQ: Spring, TX - May 8

• Aging issues with phosphoric acid/sulfuric acid electropolishing solution? Thanks! Resolved :-) - May 5

• Need non-magnetic 17-7 PH material - May 4

• Diffusion Treatment Of 316 Stainless Steel stained it - May 3

• Electropolishing nickel-titanium (nitinol) Q&A's, Problems & Solutions - April 27

• Stainless Steel Electropolishing parameters open Q. - April 18

• Need consultation support of AMS2487/AMS2488 Type II Anodizing Process RFQ Bangalore, India - February 20

• Ferric Chloride Not Etching Stainless Steel - February 17

• Using titanium baskets & scrap aluminum wire as anodizing cathode? open Q. - May 23 TODAY

• White spotting on black anodising - May 21 yesterday

• Black spots on anodized surfaces - May 16

• Issues black anodizing & clear anodizing sandwich panels open Q. - May 14

• Can't Get Anodized Aluminum Watch Dials Blue Enough - May 13

• Need anodizing theory Thanks! Resolved :-) - May 12

• Problem in shiny anodized product - May 4

• Blueish discoloration on hard anodized parts - April 17

• Black spots on aluminum from anodizing open Q. - April 12

• Dissolving aluminum with caustic soda - April 8

• Current drop during anodizing - April 7

• Stains on 6061 Aluminum open Q. - April 6

• Thickness/weight of anodize coatings Thanks! Resolved :-) - April 4

• Chromic Acid Anodizing: Introduction and Problems & Solutions - March 29

• Phosphoric Acid Anodizing (PAA) current & thickness issues - March 17

• Pitting Defect on Bright Finished Aluminium Extrusion open Q. - March 16

• Setup and startup of a new anodizing line - March 16

• Hardcoating Of Cast Aluminum (ADC12) open Q. - March 16

• Black anodized parts feel like a chalkboard Thanks! Resolved :-) - March 8

• Anodizing Cast Aluminum - March 6

• Chromate not properly coating 5052 alloy open Q. - March 3

• Two-color anodizing - February 20

• Anodizing amperage drops to zero - February 20

• How to do printing onto Anodized Aluminum open Q. - February 20

• Chemfilm & hard anodize on mic 8 aluminum - February 17

• Chromic acid is being dragged into black dye tank (February 15)

• Electrocolouring of anodized aluminum: speckles & white powder stains open Q. (February 12)

• Electroplating / Electrodeposition of Aluminum (February 11)

• Masking/stripping when chromate conversion and anodizing on same part open Q. (February 9)

• Need world-class re-anodizing of a large sculpture RFQ Hudson NY (February 9)

• Anodizing and electroless nickel on same piece (February 2)   

• Nickel plated parts peel when powder coated - May 23 TODAY

• Pin holes on hard chrome plated bars open Q. - May 21 yesterday

• Can we use stainless anodes in silver plating to battle rising concentration? open Q. - May 21 yesterday

• Defects on test panel left in the water open Q. - May 19

• White haze on parts after sulfamate nickel plating open Q. - May 17

• How long can nickel current be interrupted - May 16

• Hard chrome on Stellite: tank is black w/pitting & peel off issues - May 16

• Tin plating cast iron meat grinders open Q. - May 14

• Zinc Plating has unwanted Rainbow Color - May 12

• Alkaline zinc plating goes faster at low temperatures than high Thanks! Resolved :-) - May 11

• Why must diluted acid be used in nickel plating, not concentrated? - May 7

• Cost/pound for FO1 Zinc Plating w/ Clear Chromate on steel open Q. - May 5

• Need Silver or Tin Plating of Low-Voltage Contacts made from Copper & Brass RFQ: Milwaukee, WI - May 4

• Poor Salt spray test results on black zinc plating - May 4

• Some problems in Zinc-Nickel Plating - May 4

• Zinc plating with clear chromate discoloration issues - May 4

• Need Shop to do Chrome Seal per PS 11501 RFQ Concord CA - May 3

• Acid zinc plating: peroxide is doing something to clog our filters - May 2

• Sulfamate Nickel Strike Problems - May 2

• Function of Boric acid in Nickel Plating - May 2

• Activating/reactivating old Nickel plating - May 2

• Blue Chrome defect in hard chrome plating - April 28

• Alkaline Zinc Plating Rundown Streaking - April 26

• What is Blue Chromate Plating? - April 23

• Weird Hard Chrome on Sulfamate Nickel adhesion problem open Q. - April 23 Inquirer often helps others, so especially deserves our help

• Cloudiness & rainbows after Zinc Plating - April 19

• Substitute/Alternate/Replacement for Rhodium Plating open Q. - April 15

• Nickel or Electroless Nickel plating on nitrided steel open Q. - April 15

• Non cyanide copper plating Q&As / Problems & Solutions open Q. - April 13

• How to make Rhodium Plating Solution Thanks! Resolved :-) - April 13

• Cause of white patches in yellow zinc plating open Q. - April 9

• Copper & Nickel Plating Thickness vs. Salt spray Resistance Thanks! Resolved :-) - April 7

• Acid Zinc Plating: Problems & Solutions - April 7

• Brass Plating Problem: we add zinc salt but analysis shows no increase in zinc concentration - April 6

• How to calculate plating cost? open Q. - April 1

• Brush plating stainless with Wood's Nickel Thanks! Resolved :-) - March 29

• HCl immersion time for replating old car parts - March 27

• Turbulence limit for chrome plating of inner diameter? open Q. - March 27

• Nickel Contamination of Gold Plating Bath - March 27

• Hard chrome broken & burnt - March 26

• Electrical conduction properties of nickel plating - March 25

• We need gold plating consultant RFQ Minnesota - March 22

• Our nickel plating on copper & brass suddenly started peeling - March 21

• Chrome Plating Throwing Power Thanks! Resolved :-) - March 21

• Problem holding Zinc concentration in alkaline Zinc plating bath - March 21

• Black Chrome Plating is making our hands dirty open Q. - March 18

• Rhodium plating of silver rings Q&A's - March 10

• Alkaline zinc plating speed (allowable current density) - March 6

• Ruthenium plating on high phosphorous EN open Q. - March 4

• Hydraulic fluid leaks through/over hard chromium plating open Q. - March 4

• Need Cadmium Plating per NAS672 RFQ So. California - March 3

• Zinc plating thickness vs. salt spray resistance - March 2

• Copper Tungsten: Activation / Plating / Surface Treatment Thanks! Resolved :-) - February 28

• Hydrogen embrittlement in zinc plating of auto parts from the 1960's - February 23

• Thin Dense Chrome has Brown Spots open Q. (February 15)

• Nickel plating onto alumina dispersion-strengthened Cu alloy (February 14)

• Barrier layer when gold plating on sterling silver open Q. (February 13)

• Poor plating adhesion on Remko (high purity iron) material (February 13)

• Hard chrome plating on copper open Q. (February 11)

• Matte Tin Plating on top of Bright Tin Plating open Q. (February 11)

• White Spots on Cadmium Plating from wooden shipping crates? open Q. (February 10)

• Cost of hard chroming a cylindrical shaft (February 10)

• Cadmium Plating Problems Thanks! Resolved :-) (February 10)

• How to make gold plating last longer? open Q. (February 9)

• Need Tin-cobalt plating RFQ Wheeling, IL (February 4)

• Need to hold surface finish on Zinc Nickel plated parts open Q. (February 3)

• Clear zinc plating develops brown stains with time open Q. (February 3)

• Fingerprints on silver plated finish (February 2)

• Poor adhesion of Electroless Nickel Plating onto steel open Q. - May 15

• Electroless nickel plating is turning black, tarnishing open Q. - May 2

• Immersion gold plating vs. electroless gold plating - April 26

• Chrome plating peels off of ABS+PC - April 5

• Preventing discoloration of tin plated copper bus bars - April 5

• Need EN on Magnesium Touched Up RFQ Tucson AZ - March 27

• Palladium-free direct plate technology for plating on plastic? - March 20

• Electroless Nickel plating on NiCr - March 7

• Immersion gold) peels off of electroless nickel - March 3

• Selective Electroless Nickel Plating or Stripping open Q. - February 25

• In-situ Electroless Nickel Plating Repair open Q. (February 10)

• Racks for plating ABS/plastic get electroless nickel plated 2nd Rqst (February 3)

• How to get Black PVD finish - May 22 yesterday

• PVD coatings: color control - May 4

• Masking in PVD process open Q. - March 25

• Need to patch up the leakage in vacuum chamber open Q. - March 22

• Diamond Like Carbon (DLC) Coating Coming Off After Steam Autoclave - March 16

• Pinholes in base coat for vacuum metallizing on ABS (February 7)

• Types of zinc used for galvanizing: PWZ vs.GOB for solar profiles open Q. - May 21 yesterday

• Galvanizing defects: black patches open Q. - May 20

• What is an Ash Box (in Hot Dip Galvanizing) - April 24

• Hot dip galvanizing: what is reasonable dross & ash material loss? - April 24

• How to calculate/measure the thickness of zinc coatings open Q. - April 11

• Iron content in hydrochloric acid - April 1

• How to start a simple, low investment galvanizing plant open Q. - March 29

• How Can I Reduce Zinc Dross - March 22

• White patches on new hot dip galvanized - March 22

• Wire hot dip galvanizing open Q. - March 20

• Converting from wet galvanizing to dry galvanizing Thanks! Resolved :-) - February 21

• Impossible to make Zn-Mg-Al ternary hot-dip galvanized steel pipe? open Q. - February 18

• Prevention of white rust in wire galvanizing (February 15)

• Want to know reasons for PIT MARKS on galvanized sheet (February 15)

• Aluminium addition to Galvanising Kettle (February 12)

• Rusting of Hot Dip galvanized steel (February 12)

• Black oxide problems on 4340 steel open Q. - May 13

• Steam Homo Treatment vs Black Oxide Treatment - April 6

• Black oxiding of hardened steel is brown open Q. - March 3

• Misc. problems in CED (cathodic electrodeposition) coating - May 2

• Random adhesion failure in Electrodeposition coating open Q. - April 15

• CED painting voltage is dropping open Q. - March 2

• Powder Coating Galvanized Steel open Q. - May 17

• Necessity for primer with powder coatings? open Q. - April 19

• How to prevent corrosion of dully powder coated CRCA panels from acid fumes? - March 29

• Powder coat adhesion problem on zinc plate - February 20

• Powder coating on cast iron calipers open Q. (February 3)

• Water spot problem in CED open Q. - April 4

• Need electrophoretic lacquer on alligator clips RFQ Akron OH (February 7)

• Paint moisture problem open Q. - May 14

• Hologram-like defect in automotive paint - April 25

• Plastisol Mixing Formulas and Improvements open Q. - April 15

• "Passivating" carbon steel using Citric Acid open Q. - April 12

• Can You Paint a Car with House Paint? open Q. - April 11

• Zinc rich primers in submerged service on steel ships open Q. - March 20

• Earthing/grounding of parts during paint application open Q. - February 25

• Formula for NC Thinner & Auto Thinner? open Q. - February 24

• Poor paint adhesion on Zinc-Nickel plating open Q. (February 1)

• Chromate conversion on cadmium not adhering open Q. - March 23

• Generic solution for chromating brass - March 22

• Bright Dipping of Brass: some shop problems open Q. - March 20

• Chemical to remove nickel plating from silver or brass jewelry? - May 12

• How to remove gold from copper? open Q. - March 23

• Stripping tin from copper (tin resist on PCB won't maintain normality) - February 17

• Stripping Nickel From Invar open Q. (February 11)

• Stripping nickel electroplate from Kovar open Q. (February 1)

• Making sulfuric acid anodizing solution Thanks! Resolved :-) - May 13

• Method to Determine Concentration of Sodium Dichromate - May 12

• Measuring equipment for silver plating brightener? open Q. - April 18

• Method to identify tin plating versus nickel plating - April 12

• How do you know it's electropolished? Validation open Q. - March 28

• Silver Plating Adhesion Tests & Problems, AMS2410 & AMS2411 open Q. - March 21

• Propylene Glycol leak into Sulfuric Anodizing Tank open Q. - February 22

• Weight measurement of zinc phosphate coatings (February 11)

• Silver plating: analysis of silver (February 10)

• Nickel thickness measurement: which electrolyte? open Q. (February 1)

• Can Trivalent Chromium degrade into Hexavalent Chromium? - May 3

• Dangers of drinking deionized water open Q. - April 19

• Methods for pH measurement in D.I. water - April 15

• Is chrome plated drain cover poisoning my cat? - May 15

• Chromate poisoning from concrete work - April 10

• Fumes from Nichrome wire? - March 23

• I'm allergic to gold - March 12

• Fumes from stainless pot left on burner sickened me - February 25

• Copper Sulphate as Liver Fluke Prevention? open Q. (February 11)

• Heating/cooling coil material for chrome plating - May 20

• Sodium hypochlorite (bleach) piping problems - May 19

• Sludge buildup in phosphating piping - May 12

• Maximum safe watt density for zinc plating solution heating - May 10

• Passivating electroless nickel tanks; anodic protection - May 3

• Heating and Cooling of Chrome Plating Tanks RFQ: SP, Brazil - May 2

• Ideal Sequence for Alkaline Zinc Plating - May 2

• Materials of construction for pump for zinc phosphate open Q. - April 6

• Hard Anodize Tank Design - March 25 Inquirer often helps others, so especially deserves our help

• Sodium Dichromate Seal Tank Liner Materials and a compatible filter (February 9) Inquirer often helps others, so especially deserves our help

• Water Evaporation Estimates at Sub-freezing Temperature (February 3)

• Swedish Standard St2 / St3 open Q. - May 2

• MIL-C-5541: Will It Work On Copper - April 13

• Cadmium Plating spec QQ-P-416 and clear chromate - March 23

• Galvanic Corrosion Test for Titanium Anodize (AMS 2487) open Q. (February 16)

• Looking for "Theory and Practice of Pulse Plating" (February 15)

• Zirconium Coating Daimler Standard open Q. (February 6)

• Definition of "passivated" in regards to metal finishing, plating, and stainless steel - March 13

• Hardening EN8 / EN9 parts. Q&A's, Problems & Solutions open Q. - April 1

• 316L Stainless is too spring-y open Q. - March 4

• Silver brazing flies out of gap between copper surface and nickel plated surface open Q. (February 9)

• Pinholes / blowholes in cast aluminum components open Q. (February 1)

• Why is broken catalytic converter honeycomb worthless as scrap? open Q. - May 21 yesterday

• Refining of silver chloride to silver metal - April 26

• Best and Easiest way to refine gold dust open Q. - April 21

• Extracting Silver From Photographic Fixer open Q. - April 18

• How to precipitate gold from HAuCl4 solution open Q. - March 27

• Recovery from AP waste solution open Q. - March 8

• Strip and recover silver from silver plated tableware open Q. - March 8

• Gold recovery with zinc - February 21

• Painting or sealing asphalt shingles open Q. - May 23 TODAY

• Acid testing for silver & precious metals - May 23 TODAY

• Etching of steel texture plates for rolling mill with copper sulfate & salt - May 20

• Spray chroming with silver nitrate open Q. - May 19

• Looking for "NicSand" Aluminum Oxide Sanding Gel - May 19

• Blacken a copper sink - May 17

• Black anodizing is purplish not black - May 16

• Bluing/Black Oxide/Zinc Phosphate Thanks! Resolved :-) - May 13

• Replating of silver jewelry Thanks! Resolved :-) - May 11

• Painting inside of galvanized stock tanks (underwater use) - May 10

• Electroplating & grinding vs. a piston bush to repair piston open Q. - May 9

• Cleaning/repairing zinc tabletop open Q. - May 9

• Painted yard art now lacks patina - May 8

• Paint a roof to look like real copper - May 8

• Alternatives to achieve rainbow effect - May 5

• Brass Finishers in the 1800's open Q. - May 4

• Painting an aluminum boat - May 3

• 1995 non-copper penny - May 2

• Re-do nickel-lined copper cookware open Q. - May 2

• Can gold be reclaimed from old ceramic dishes with gold trim on the edges open Q. - May 2

• Sterling silver vs. silver plated -- How to tell? Thanks! Resolved :-) - April 28

• Decorative anodizing of titanium - April 25

• Oxidize copper without patinating solution - April 25

• How to do Gold Plating of Vinyl Records open Q. - April 24

• Problems and solutions in copper electroforming - April 19

• Dishwasher ruined shiny aluminum -- How to fix it? - April 19

• Restoring the yellow dichromate finish on automobile carburetors open Q. - April 18

• UV light is tarnishing silver? - April 14

• Remove copper-nickel cladding from copper core coins? open Q. - April 14

• Clear Coating Stainless Steel? - April 13

• Silver polish (Tarn-X) stained my stainless steel sink open Q. - April 12

• Copper plating steel in home shop - April 9

• How to Make Aluminum Corrode / Patina? - April 4

• Theda Sterling Silver Medals, Crosses, & Jewelry open Q. - April 1

• Copper-plating of leaves and bark - April 1

• Remove Teflon coating from pot with oven's self-cleaning temperature? - March 31

• What kind of finish is on my grill? Thanks! Resolved :-) - March 28

• Grout cleaner stains on my stainless steel fridge! open Q. - March 25

• Cold galvanising over black oxide or solid rust Thanks! Resolved :-) - March 23

• How to identify old lamps? open Q. - March 23

• Want to plate nickel silver watch dials RFQ: London, England - March 21

• Allergic to black rhodium - March 20

• Coating hot tub parts open Q. - March 20

• How to remove epoxy from stainless steel floor open Q. - March 17

• Hot rolled steel stairs open Q. - March 16

• Damaged finish on copper table March 16

• Decorative painting of a metal mailbox open Q. - March 12

• Gold leaf for ornate bronze lamp? - March 10

• Want my stainless steel table brushed or dulled down RFQ Philadelphia - March 8

• Etching Al-Cu PCBs open Q. - March 6

• Clear coat sealer for cast iron bird bath - March 5

• Cleaning/restoring vintage tin humpback trunk open Q. - March 4

• Making black watch dials brown open Q. - March 2

• Silver Pennies - March 2

• Artist Anodizing of Aluminum - March 1

• Cleaning Dirilyte Gold-tone Flatware Thanks! Resolved :-) - February 23

• Corten Rusted Steel -- Q&A, Applications, Problems open Q. - February 20

• Why would yellow gold turn silver? - February 18

• Is Rit Dye Effective for Anodizing? - February 18

• Copper/Aluminum interaction and galvanic/hydrolysis problems open Q. (February 16)

• Need replating of dark brass coffee table RFQ Miami FL (February 15)

• Medallion Liquid Gold electroless (replacement-catalytic) product open Q. (February 15)

• Need fiberglass and resin mask gold plated RFQ Kansas City MO (February 15)

• Three-color anodizing open Q. (February 11)

• Restoring an old National Cash Register (February 11)

• "Rainbowing" and "Bluing" of Stainless Steel (February 11)

• Recipe for red patina on brass & copper (February 10)

• Restore brass doorknobs, ashtrays, etc. (February 10)

• How to Strip nickel plating from iron or steel (February 10)

• Q&As about Gold Plated Flatware open Q. (February 4)

• "Aluminium paint" applications and issues open Q. (February 3)

• Acid Zinc Plating Brightener Q&A open Q. - May 14

• Electroplating Copper Chromium Alloy Deposit? - May 13

• Reaction between hot aqua regia and sulphur open Q. - April 1

• Electroplating Copper onto PVD/Sputtered Gold Substrate - March 30

• Ni-W coatings with high W content crack open Q. - March 29

• Zinc stopped plating out when voltage got high - March 28

• Ruthenium use in iPhone open Q. - March 25

• Electroplating of copper onto sputtered gold open Q. - March 22

• Plating copper pipe with iron open Q. - March 22

• Titanium plating (Electrodeposition OF titanium) - March 2

• How many times can 4340 be cad plated, stripped, and replated? - February 28

• How to Remove Red-Orange Color from Chromium Trioxide - February 25

• Effect of hydrogen on aluminum open Q. - February 20

• Want bright brass plating to look like gold open Q. - February 17

• Nickel Plating on Glidcop: Can't get good adhesion (February 15)

• Best Nickel-Manganese-Cobalt plating bath open Q. (February 10)

• How many mL of water must be added to 10 grams of NaOH to make a 0.50 molar solution? Thanks! Resolved :-) - May 23 TODAY

• What do black spots on aluminum sculpture tell art student? open Q. - May 19

• Dark Reddish Spots when Bronze Casting open Q. - May 10

• Strange reaction of copper BB on a bronze sculpture - May 2

• Protecting Metal Birds in the Tropics - April 23

• How to clean/repair C Jere metal sculpture open Q. - March 21

• Painting cast iron fountains / restoring rusty fountains - March 10

• Steelcase Tanker Desk Restoration Tips: remove the lock open Q. - May 15

• Removing yellow stains from bath tub open Q. - May 14

• Identifying rings and hallmarks open Q. - May 13

• Green colour transformer oil in storage drums open Q. - May 4

• Mercury damage to gold jewelry can be fixed with coconut oil - May 2

• Cleaning & Polishing Seashells open Q. - April 28

• Built in cast iron bread baker? Thanks! Resolved :-) - April 27

• Sedgwick Residential Elevators Parts and Maintenance open Q. - April 18

• How to make bronze open Q. - April 18

• About sweet spirits of nitre & paregoric - April 14

• Antique icebox Q&A's, Problems & Solutions open Q. - April 13

• Found very valuable rocks? - April 12

• Stiffel lamps: How to repair Q&A's - April 10

• Convert volume conductivity to volume resistivity - April 5

• Hoyt Metal Ingot. What type of metal do I have? - March 30

• Want to learn Geology, Metallurgy, & Fossils open Q. - March 29

• Interested in smelting a ring from rhodium open Q. - March 16

• How to convert synthetic oil perfume to water based perfume open Q. - March 12

• Problems in Phenyl Manufacturing, Q&A;s - March 11

• Is bronze flatware safe in the dishwasher - March 6

• Repair of barber chairs open Q. - March 5

• Crowsfoot with torque wrench. What's the math? open Q. - February 28

• Bleaching Saguaro (Cactus) Skeletons (February 13)

• Is this a FB Rogers hallmark? (February 11)

• Which metal is safest for fireplace heat exchanger? open Q. (February 10)

• Restoring Comstock Castle cast iron stove open Q. (February 2)