Legacy Q&A finishing Hotline

Coloring Nickel Plating
– 5/1/26

Finishing Process for Zamak
– 2/13/26

Starting a small zinc plating business
– 1/25/26

Zinc oxide production: French process vs. Cyclone Method
– 12/21/25

Reddish brown coating on hand tools
– 10/1/25

GI sheet vs. CRCA for rust prevention and corrosion protection
– 7/3/25

Compatibility of aluminum and brass
– 5/16/25

Aluminum posts embedded in concrete
– 5/13/25

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Zinc die castings get black spots from vibratory finishing
– 1/9/26

Sturgis Finishing – F30 5/16″ x 5/16″ Pink Pyramid
– 12/2/25

Problems Blasting Stainless Steel
– 11/6/25

Pretreatment of hot rolled steel for Electroplating
– 11/6/25

Rust reappears after sand blasting
– 11/6/25

Deburring of Aluminum components
– 9/7/25

What is Shot Peening?
– 8/4/25

Furniture maker needs super matte perfectly even surface on aluminum tubing
– 6/2/25

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Remove white hue from machined black ABS
– 5/21/26

Manganese phosphate coating: issues and answers
– 4/21/26

Electropolishing / electro-chemical polishing bath for silver
– 1/28/26

Ultrasonic Cleaning Causes Leopard Spots (brass & stainless steel)
– 12/19/25

Etching Copper PCBs & Designs
– 12/10/25

Starting acid dip stripping for classics
– 12/2/25

Continuous coil degreasing — White/brown spots/patches on startup
– 11/3/25

Ash Marks in Zinc Phosphating
– 9/1/25

Rust Formation Post Phosphate Pressure Wash
– 8/19/25

Yellow to brown stains after zinc phosphate
– 8/19/25

Zinc Phosphating Problems & Solutions
– 8/5/25

Need Zinc Chloride Wash Station RFQ open to all: Illinois
– 6/2/25

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Pull-through Masking plugs
– 4/24/26

Masking During a Zinc Phosphating and Powder Coating Process
– 7/23/25

Dual tone nickel + gold electroplating
– 5/31/25

Masking for Selective Silver Plating
– 3/8/25

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Required Current Density for Electropolishing
– 11/21/25

Passivating a nickel-plated part
– 10/6/25

Electropolishing surfaces instruction
– 10/2/25

Titanium coating on titanium
– 9/21/25

Coloring Titanium in an Aluminum Anodizing Line
Inquirer often helps others, so especially deserves our help
– 9/20/25

Electropolishing and Chemical Etching Processes for Cobalt Chromium
– 7/16/25

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Trouble with Iridite 14-2 on 2024
– 5/21/26

White Powder/Salts on Anodized Aluminum
– 5/16/26

Can sealer contamination contribute to white spots?
– 4/24/26

Burning damage during anodizing
– 4/22/26

Black anodizing after shot blasting is matte
– 3/28/26

Should TCP Trivalent Chromate Bath Be Filtered?
– 3/20/26

Foam Layer Growing on Anodizing Bath.
– 3/10/26

Color Anodizing Titanium: ‘First Blue’ vs Second
– 2/14/26

Hardcoat Anodizing a Fixture Plate with 4000 Tapped Holes
– 2/14/26

What is TSA Anodising
– 2/13/26

Our Black Anodize Is Now Coming Out Blue or Brown
– 2/11/26

My anodizer says they can’t rack my part
– 1/26/26

Black anodizing after shot blasting is matte
– 12/16/25

Boric-Sulfuric Acid Anodizing (BAC5632) Problems & Solutions
– 12/11/25

Anodizing after Overmolding — Tank Contamination from Plastic
– 12/11/25

How to Silver Plate Aluminum
– 12/10/25

Temperature limit for MIL-DTL-5541 chromate conversion coating
– 12/9/25

New Rectifier, Can No Longer Hard Anodize 2XXX Aluminum without Burning
– 12/9/25

Coatings/Finishes/Platings for aluminum heat sinks
– 12/4/25

Black anodizing is purple not black
– 11/10/25

Teflon Coating/Impregnation of Anodized Aluminum
– 11/7/25

Aluminum Welding Porosity — Caused by Etching?
– 11/6/25

Aluminum Sheetmetal Warping after Anodizing
– 11/5/25

Cloudy surface after clarification in nitric acid
– 10/22/25

Finishing to meet 1000 hrs Salt spray Testing on Aluminium DIecast
– 10/20/25

Chemical polishing defect (anodizing)
– 10/3/25

Type 2 anodize color consistency
– 10/3/25

How to Keep Anodized Aluminum Unsealed
– 10/1/25

Black/gray pitting after anodize – help? :)
– 9/29/25

Chem Film Rework plan
– 9/20/25

Aluminum Anodizing flakes off after heating to 125 °C
– 9/17/25

Clear Anodized 6061 — Black Pitting in Bore
– 9/13/25

3-D Printed Aluminum Won’t Anodize Black
– 9/9/25

Magnesium electropolishing and annealing
– 8/21/25

Phosphate Contamination in Nickel Acetate Seal
– 8/18/25

Clear anodize has a yellow tint
– 8/13/25

Rainbow effect / defect on anodized aluminum?
– 8/5/25

Aluminum in the 1930’s: “Deplated Finish”
– 7/18/25

Zirconization of anodized aluminum
– 7/1/25

Ultrasonic rinsing after anodizing
– 6/16/25

Black spots /shadow on anodized aluminum corners
– 6/13/25

Anodizing Of Cast Aluminum (ADC12)
– 6/12/25

White spots in anodizing of castings
– 5/15/25

Anodizing of firearms. Refinishing AR15 receivers
– 5/12/25

Passivation of Polished Aluminum
– 5/12/25

Excess dye on surface of anodized parts
– 5/3/25

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Hard Chrome Plating Aluminum Printed Parts
– 5/13/26

Copper Plating on Bronze Has Poor Adhesion
– 5/6/26

What type of plating is this?
– 4/22/26

Silver Plating on Tellurium Copper
– 3/30/26

Problems in 14k gold plating solution
– 3/19/26

Problems in cyanide copper plating
– 2/13/26

Old Gold Plating Solution Available RFQ open to all: New York
– 2/12/26

Formulating a Non-Cyanide Gold Plating Solution
– 2/11/26

Silver plating on resistor terminal is oxidizing
– 1/29/26

Copper plating — Roughness in acid copper on gravure cylinders
– 1/28/26

Using Copper Oxide for Electroplating
– 1/26/26

Zinc plating of SS without Woods nickel
– 1/8/26

Watt’s Matte Nickel Is Suddenly Bright
– 1/5/26

Pitting problem in bright nickel plating bath
– 1/5/26

Nickel Plating Adhesion Problems & Adhesion Testing
– 1/5/26

Plating zinc diecast (Zamak-3): Process sequence?
– 12/14/25

Acid Copper Plating: issues & problems
– 12/10/25

Black Nickel Plating without Black Salts Available
– 12/9/25

Need Gold Plating of SS appliances RFQ open to all: Baltimore
– 12/4/25

Inspection of Zinc Nickel plating
– 11/10/25

Plating gold directly onto brass
– 11/5/25

Corrosion of zinc plating after 55 days in transit
– 11/3/25

Delayed blistering of plated diecast parts
– 11/2/25

Porosity Problems in Hard Chrome Plating
– 10/26/25

Extreme LCD problem, Ni strike & Ag cyanide don’t cover
– 10/19/25

Raising tensile strength in Nickel Sulfamate bath 3rd Rqst
– 10/18/25

Need CAD finish RFQ open to all: Salem Virginia
– 10/14/25

Gold peel-off over high phosphorus electroless nickel
– 10/10/25

Sulfamate nickel plating bath problem with growths
– 10/10/25

Electroforming with Brass RFQ open to all: Vadodara India
– 10/10/25

Recubrimiento acero alto carbon
/ Coating high carbon steel
– 10/10/25

Zamac with high porosity; process is not able to cover the pores
– 10/3/25

Acid Zinc Plating is Shiny & Bluish
– 10/3/25

Egg Albumin concentration as electroforming separation aid?
– 10/1/25

Plating Pd or Au on smooth polyimide film RFQ open to all: Minnesota
– 10/1/25

Using Pre-Plated BeCu
– 10/1/25

Boric Acid and Nickel Plating
– 9/24/25

Ni-Cr Plating on Diecastings Blistered
– 9/23/25

Black spots after copper coating
– 9/22/25

Need solar absorber coatings — black chrome or blue sputter coat RFQ open to all: Colorado
– 9/21/25

Can you rework an ID on a titanium part by plating?
– 9/20/25

Gold plating of 440A
– 9/10/25

Random growths dots on Hard Chrome plating in HCD area
– 9/9/25

Need Phosphor Bronze Plating Service RFQ open to all: California
– 8/27/25

Copper is spontaneously depositing on rotogravure cylinders
– 8/21/25

Tin plated parts are turning black
– 8/14/25

Copper plating onto Silver isn’t adhering properly
– 8/6/25

Nickel-boron plating pitting problem in MEMS probe card
– 7/31/25

Alkaline Zinc Barrel Plating — Suggested current & time
– 7/23/25

Copper plating steel grounding (earthing) rods
– 7/23/25

Stain marks found on matte tin surface
– 7/3/25

Nickel plating zamac die castings for bathroom fixtures
– 7/1/25

Heavy Bronze Plating Is Delaminating
– 6/25/25

Acid zinc plating Anodes
– 6/20/25

What is the Composition of EPNS silverware?
– 6/16/25

White streaks/patches, and spots, after Nickel Plating
– 5/31/25

Blue Color Powder on Silver Plated Parts
– 5/30/25

Acid Zinc Bath Contamination
– 5/25/25

Titanium-Cadmium Plating Q&As, Problems & Solutions
– 5/24/25

Acid zinc plating: Non coverage problem
– 5/13/25

Gold/yellowing on non-chromated zinc plated Hull Cell panels
– 5/13/25

Glycol contamination in alkaline zinc bath
– 5/13/25

Alkaline zinc plating bath: How to remove carbonates
– 5/9/25

Electroplating wire with zinc/tin for Garment hangers
– 5/7/25

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Immersion gold plating
– 5/9/26

Electroless Zinc Plating
– 2/14/26

Electroplating ABS-PC leaves skips & overlaps at parting lines
– 11/29/25

Problems Chrome Plating ABS Plastic
– 7/13/25

Mirror finish spray chrome – topcoat yellowing
– 7/6/25

Waviness problem in Nickel Chrome Plating on ABS Plastics
– 5/18/25

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Can’t get rid of anodizing sealing smut
– 11/15/25

Need to TiN coat a circular blade, 90 mm dia x 2 mm thick – 200 pcs RFQ open to all: Murfreesboro, TN
– 12/23/24

High Temperature PVD Coatings
– 12/14/24

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Spotting, Staining, Blackening of Hot Dip Galvanized Finish
– 5/13/26

Is Double Salt Flux Causing Huge Zinc Consumption?
– 5/7/26

How to Weld Galvanizing Kettles
– 4/3/26

Pot roll ceramic bearings
– 3/30/26

Galvanizing Without Rinsing
– 1/23/26

Eliminate foam in galvanizing line
– 10/17/25

Triple Salt and Quadra Flux Densities?
– 6/23/25

How to reduce shine of galvanizing
– 6/5/25

Hot-Dip Galvanizing Kettles: how to build
– 5/30/25

Hot-Dip Galvanizing: best Nickel and Aluminium content?
– 5/13/25

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Cold Bluing / “Room Temperature Blackening” Problems
– 4/22/26

Black oxide Activator?
– 11/25/25

Gunsmith Blueing / Hot Bluing of Firearms
– 10/6/25

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Nitriding/QPQ Assistance Please
– 8/4/25

Geomet 750 Hp galvanizing
– 8/6/25

Ferritic Nitrocarburizing has red color to it?
– 6/15/25

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Runs/sags & yellow stains in trunk & gutter areas
– 4/25/26

White spots in CED coating
– 4/23/26

Pin holes in CED e-coating
– 2/20/26

Electrodeposition/e-coating (CED) issues & problems
– 12/6/25

How to Increase DFT Paint Thickness in Cathodic Electrodeposition (CED) system?
– 10/25/25

Foam deposition on E-Coat/CED Parts
– 7/24/25

CED coating process questions
– 7/16/25

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Pinhole problems in powder coating
– 1/26/26

Checklist for Powder Coating Preventative Maintenance
– 9/10/25

Powder coating as maskant for Class I EN plating
– 8/18/25

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Steel sealant for cold rolled countertop
– 3/13/25

Want anti-pit solvent for Electrophoretic Lacquer
– 12/4/24

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White finish for Stainless Steel Dental Crowns
– 3/6/25

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Chromate for Tin-Zinc Alloy Plating
– 5/21/26

How to achieve Brown Zinc Chromate finish?
– 4/25/26

Chromate on Zinc — Formula for Blue Passivation
– 12/20/25

Improve Shelf Life of Anodising or Stannous Sulfate
– 11/5/25

Anti tarnish for copper coating on imitation jewellery
– 11/26/25

Black zinc plating/chromate turns green
– 9/11/25

Olive drab Chromate Coating
– 6/6/25

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9 kt gold solder composition
– 5/5/26

Hydrogen Embrittlement of Zinc Plated Wishbones?
– 9/9/25

Hydrogen Embrittlement in Plating
– 4/28/25

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Remove copper & tin from steel with room temperature solutions
– 5/6/26

What to use as anodize remover/stripper
– 5/3/26

Stripping chem-film from aluminum
– 5/2/26

Remove rhodium plating from gold — Is Rhodium plating reversible?
– 12/9/25

Stripping Nickel From Kovar
– 7/25/25

Removing/stripping TiN (Titanium Nitride) coatings
– 5/18/25

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UV-Vis Spectrophotometry for Plating Bath Analysis
– 5/3/26

XRF vs Eddy Current for Zinc Plating on Steel Thickness Measurement Inquirer often helps others, so especially deserves our help
– 2/12/26

Analyze Chrome Plating Bath; Determine sulphates
– 12/9/25

Ferric chloride etch — titration / analysis issues
– 11/28/25

Analysis of nitric-hydrofluoric aluminum etching mixture
– 11/13/25

Zinc coating thickness vs. salt spray resistance
– 9/23/25

Determination of hexavalent Chromium in Trivalent Chrome Plating solution
– 6/17/25

What wavelength for testing Bonderite T-5900?
– 6/2/25

Caustic Analysis — Free Alkali vs. Total Alkali
– 5/16/25

Analysis of alkaline zinc plating bath
– 5/3/25

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Need Ion Exchange Recovery System for Nickel RFQ open to all: Wisconsin
– 5/21/26

Water treatment chemicals for metal finishing: Sharing experiences and case studies
– 1/28/26

Wastewater turning black with high nickel numbers
– 11/29/25

Removal of Ammonia from Wastewater
– 7/23/25

Spot test for cyanide in waste water
– 1/26/25

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Is Aluminum Anodizing Reach & RoHS compliant
– 3/30/26

Cr+6 in Fumes from Welding Stainless Steel
– 1/28/26

Is Thai bronze flatware safe
– 12/2/25

Chromium III vs Chromium VI Plating processes
– 11/17/25

Is boric acid toxic?
– 8/18/25

Health risks of smoking near nickel plating solutions
– 7/28/25

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Paint Booth Air Flow guidance
– 5/21/26

Small parts barrel plating cylinders: Freeloader?
– 5/1/26

Hanson – VanWinkle – Munning (H-VW-M) / M & T Chemicals memories & memorabilia
– 2/18/26

Sulphuric Acid LR Vs CP grade
– 1/9/26

Barrel plating dangler problems and alternatives
– 12/11/25

Need Racking Machine – Endura
– 10/10/25

Algae, and Ventilation of Boric/Sulfuric Anodizing BAC5632
Inquirer often helps others, so especially deserves our help 2nd Rqst
– 9/25/25

Brass V-blocks Overheating During Chrome Plating
– 9/21/25

Barrel plating dangler problems and alternatives
– 9/13/25

Can Polypropylene Tanks Cause EN-P Adhesion Issues?
– 11/1/25

Why Anodizing Uses a Hollow Copper Work Bar
– 7/1/25

Cooling the Hot DI Seal after Anodizing for Deionization
– 5/7/25

Cleaning up Chromic Acid Surface Contamination
– 4/20/25

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Cadmium plating specifications query
– 1/5/26

Specification DS30000
– 7/23/25

Questions about military finishing spec. MIL-STD-171?
– 5/24/25

Specification VW 13750
– 5/13/25

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What is Black Luster® Finish for Fasteners
– 12/12/24

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Do Cadmium rust compounds glow orange/pink in UV?
– 1/23/26

Bright Annealing of 21-6-9 Small Tubular parts and discoloration on the ID
– 10/18/25

3-D printed Inconel 718 part turns blue in vacuum heat treatment
– November 16

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Is this ore/rock Platinum, Palladium & Rhodium?
– 12/10/25

Recycling gold from scrap PC boards
– 10/15/25

Iridium Extraction from Coated Titanium Anodes
– 8/5/25

Reverse electroplating for platinum recovery
– 7/2/25

How many computers for one ounce of gold?
– 6/24/25

Removing/Reclaiming Gold plating from watches, flatware, wheels
– 6/9/25

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Pennies stamped on dime blanks
– 5/18/26

Chrome plating is peeling from ABS
– 5/18/26

Fixing scratched paint on refrigerators and stoves
– 5/16/26

Restoring oil-rubbed bronze finish on sink drain
– 5/1/26

Remove paint from old National Cash Register
– 4/25/26

Effect of chloramines and residual NH3 on residential copper piping?
– 3/21/26

Looking for Green Engraver, or parts and manuals
– 3/21/26

Remove rust from zinc plated steel without damaging the plating
– 2/16/26

How to nickel plate aluminum with good adhesion?
– 2/15/26

Wrinkle Paint: How to make or where to buy
– 12/13/25

Cleaning Solution Ruined Lion Paw Clock Feet
– 12/2/25

Can vinyl decals go between the base coat and clear coat?
– 11/17/25

Nickel Plating Antique Wood Stove is Unsuccessful
– 10/14/25

Brass electroplating for amateurs & students
– 10/10/25

Steelcase Tanker Desk Restoration Tips
– 10/5/25

304 Stainless Steel heat coloring inconsistencies
– 10/1/25

Need Gillespie Antique Restorer
– 9/27/25

How to tell whether its blued or painted
– 9/27/25

Removing oxidation from bronze gravemarkers
– 9/13/25

Damaged finish on copper table
– 9/3/25

Green bubbling from silver plated brass cane handle
– 8/21/25

Need info on zinc brightener
– 8/18/25

Protection for outdoor sculptures and statues
– 8/6/25

Sawdust Patination Technique for Large Objects
– 8/6/25

Painting cast iron fountains, Restoring rusty fountains
– 8/3/25

Nickel plating my Taurus pt92 AF
– 8/3/25

Penny isn’t copper color – what do I have?
– 7/26/25

Remove Water Stain from Teak
– 7/11/25

Copper/Aluminum interaction problem in swimming pool
– 5/25/25

Need White Gold Plating on a Ring RFQ open to all: Louisiana
– 5/16/25

White Gold Ring vs. Sterling Silver Ring
– 5/1/25

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Recover thin sheets of copper from recycled copper
– 11/13/25

Chemical Drop/Black Spot on Alkaline Zinc Plated Part
– 9/8/25

Pure Cobalt Plating Problems & Solutions
– 8/21/25

How to Calculate Plating Rate (Faraday’s Law)
– 7/31/25

Need 20µ gold or silver coating on 50µ dia. spherical magnets RFQ open to all: Southampton, UK
– 5/7/25

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Electroplating science fair project
– 3/22/25

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How to darken pennies over the whole spectrum
– 4/24/26

Green Titanium Anodizing (Grade 5)
– 11/15/25

Restoring a Bronze Statue
RFQ open to all: Maryland
– 9/9/25

Protecting copper work for a gallery exhibition
– 9/1/25

Need gold plating of small objects RFQ open to all: Brooklyn, NY
– 8/7/25

Emmy is corroding and flaking
– 5/5/25

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>Hoyt Metal bars — looking for info!
– 3/30/26

Marks on rings: Marking system for rings
– 1/28/26

Need Base Ring for Padar Barber Chair RFQ open to all: 2nd Rqst – 12/10/25

Buy new vs. vintage Stiffel floor lamp?
– 12/2/25

Toxic effects of boric acid on animals; from ants to feral cats
– 9/17/25

It’s not a lamp base, it’s a font holder
– 9/9/25

Need sweet spirits of nitre (the traditional folk medicine)
– 8/20/25

Sterling silver vs. silver plate — How to tell?
– 7/5/25

Removing rust on Buddy L pressed steel car
– 6/23/25

Copper Tubing v. Black Iron for Natural Gas?
– 6/16/25

Antique Icebox & Refrigerator Discussion
– 6/9/25

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