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ted_yosem
Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
finishing.com -- The Home Page of the Finishing Industry


The HOTLINE public forum

  The authoritative public forum
  for Metal Finishing since 1989
  mfhotline


Reprise from an earlier Thanksgiving ...
    "Thanks for the compliment, [name deleted], but running this site has been my employment for decades, and as a semi-retired guy I still earn a bit from it, so no need to thank me :-)
    "But the site has a number of "regular readers" who answer most of the questions and who have made it a great place to get answers. I'm just the operator of a small website, not a movie star, but to them I repeat Bette Midler's words, with sincerity & humility:

Thank you ... Thank you ... Thank God for you, the wind beneath my wings.

Happy Thanksgiving, Ted Mooney"



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  Click/tap ⇩ to a category or just scroll on down ...

 0. Choosing a Finish (corrosion, compatibility)
  1. Preparing the part (mech. prepchem. pretreatmasking & racking)
    2. Metallic Finishing (stainless & titaniumanodizing & light metalselectroplatingelectroless platingPVD & vacuum processesgalvanizingbluing/black oxideother inorganic processes)
      3. Organic Finishing (CED, electrocoatpowder coatinglacquers, clearcoatspainting, printing, adhesives)
        4. Post-treatments (chemical post-treatsbaking, soldering, dryingstripping & reworks)
          5. Supporting Issues (analysis, lab, QA/QCwater & wastesafety, emissionsplant/process engrg.specs, books, statslingometallurgyprecious metal recovery)
            6. NON-industrial (hobbyists, around homeresearch, thesisK-12 scienceArtists' Corner)
              7. Off topic but interesting

   Post a Question or RFQ


0. Choosing a finish, corrosion

61767. Looking for the hardest, unscratchable finish for jewelry RFQ: Idaho - 11/26/24

10655. Tantalum Coating Processes - November 23

61772. Choosing a metal finishing process - November 15

12117. Deposition of Aluminum onto Steel then Anodizing - October 30

24110. PVDF / Kynar® vs. Powder coating - October 29

27702. Corrosion of silver caused by ZDDP (zinc based lubricant additives) - October 28

61760. Zinc Plate vs E-Coat - October 22

22143. 316 Stainless Shaft Gets Grooved by Radial Seals - September 25

45129. Anodizing vs. Powder Coating of Aluminum? - August 28

61705. Matching Finishes between Aluminium and Copper Parts - August 24

See more threads in this category



1. Preparation

1a. MECH PREP topics: "Grinding, polishing, vibratory finishing, buffing, honing"

61723. Mirror polishing very small hardened steel components - September 25

61715. Shot blasting for acidic electroplating - August 21

61708. 61708 Spots on steel parts from tumbling - August 19

See more threads in this category


1b. CHEM PREP topics: "Cleaning, pickling, etching, phosphatizing, activation"

61776. Mixed metal pretreatment configuration - November 16

  1404. Electropolishing of silver - November 12

61755. Anodic Electrocleaning vs electrolysis of rust - October 16

61745. Problem aluminum phosphating mild steel - October 11

  0960. Black impression after zinc phosphate vipInquirer often helps others, so especially deserves our help - September 23

61691. Zinc Phosphate - Coating Continuity Problem 2nd Request - September 23

53095. What is the best frequency range (28-40 HZ) for ultrasonic wax & degrease removal? - September 17

61728. Which chemicals for heat-treated Monel? - September 9

61707. Effective Replacement of HCl as Pickling Bath - August 19

  9146. Chemical & Electropolishing of Brass: solutions, procedures, references - August 15

133/66. White Stain after Phosphating Die Castings - August 5

61701. Precleaning steel wire before plastic coating at high speed - August 1

See more threads in this category


1c. Capping, plugging, masking, taping


adv. maskcoat banner 

61747. Protective masking for stripping and re-anodizing - October 9

61735. 61735-1i Masking my CZ Shadow for Plating - September 22

27343. Masking for Nickel Plating - September 2

See more threads in this category



2. Metallic & inorganic finishes

2a. STAINLESS, TITANIUM, CORROSION-RESISTANT METALS PROCESSING

33504. Anodizing Titanium for Wear Resistance & Anti-Galling - October 18

12146. 12146-3i Refinishing scratched stainless appliances - October 14

  2629. 2629-2i Component burned all the way through from electropolishing - September 24

55376. Pickling & Passivating 410S stainless steel per ASTM A380? - September 9

44070. Durable black coatings for stainless steel - August 28

44070. Durable black coatings for stainless steel - August 19

See more threads in this category



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

53357. Slime/algae on surface of anodizing tank - 11/27/24

61775. 61775-1i Aluminum in the 1930's: "Deplated Finish" - 11/26/24

61774. 61774-1i Anodizing: Small Area That Doesn't Dye - November 23

61770. Simultaneous etch-passivation solution for aluminium pretreatment - November 18

14462. 14441-2 Spot type seal check for black anodized aluminum - November 14

61764. Skin products affecting dyed anodizing? - November 1

33883. Problems in Plating on Aluminum (ADC-12) - October 30

61762. Delay between Aluminum Chromate & Powder Coating - October 24

61744. 61744-1i Black Anodize Blemishes & Spots - October 14

61751. Problem dying anodized aluminum green - October 11

61737. 61737-1 Is Discoloration an Etching Problem? - October 11

61726. 61726-1i Black dust on dyed black anodized aluminium - September 28

27990. Anodizing is Flaking Off of 7075 Aluminum Parts - September 28

61700. 61700-1i Need titanium anodizer for multi-color sheets for kitchen cabinets RFQ open to all: London UK - September 25

60068. 60068-2i Aluminum sheet shows stripes after chromate conversion coating - September 23

61736. 61736-1 Affect of water on 6061 anodized aluminum - September 21

617/41. 61731-1i Aluminum certified as the same etches differently - September 18

24236. Epoxy primer not adhering to conversion coated aluminum (failing bend test) - September 9

51573. 51573-1 Anodizing rectifier & chiller sizing - August 28

42362. What were the two types in the old Mil-C-5541 spec? - August 27

61716. 61716-1i Odd porosity on anodized threads AFTER sealing - August 26

43484. 43484-2i Low Anodizing Thickness in Gap between Plates - August 26

61529. Anodized Aluminium edges not taking dye very well - August 12

  6784. Need 0.5 Ra after Anodizing - August 6

40035. Desmut can't remove black coloration from etching - August 5

61699. Alloy wheels: is chrome plating or anodizing better? - August 1

See more threads in this category


  

2c. ELECTROPLATING and ELECTROFORMING

54061. Copper Pyrophosphate Plating for DMM Recording Disks - 11/28/24

61647. 61647-2i Complete Process for Cleaning, Cu, and Ag Barrel Plating - 11/28/24

  3892. Ti-Cd: Bath concentration okay, but weight percentage of Ti in plating is low - 11/28/24

28851. Zinc-nickel plating makes metal dust when crimping - 11/27/24

61725. Hard chromium plating rate is way low vipInquirer often helps others, so especially deserves our help - 11/27/24

61768. Cyanide Copper & Stannate Tin Process Questions - 11/25/24

23632. Tin Plating Problems: black spots - 11/25/24

323/63. Acid zinc plating Anodes Q&A - November 19

61771. Cadmium Density vs. Plating Speed vipInquirer often helps others, so especially deserves our help - November 15

61761. Nickel-Cobalt Electroplating - October 31

61703. 61703-1i Tri-chrome chloride bath stain - October 30

31816. Electroplated gold turns red - October 30

61749. Need parts plated to GM-6164M RFQ: Jackson, MI - October 15

14461. Hard Chrome Plating Peels Off of Inconel - October 14

42447. Egg Albumin Is Staining Nickel Electroforms - October 13

61752. 61752-1a Cyanide copper plating on zinc diecast - October 13

61748. Purple Color on Filter of Gold Cyanide Plating Bath - October 9

61740. Can We Chrome Plate Super Duplex S32760 - October 9

61686. Zinc Plating Peels Off Stainless Steel During Crimping Process - October 9

55225. 55225-3i Alkaline zinc plating problem: Black dots/spots - October 8

12879. 12879-1i Rack mark / jig mark problems in electroplating - October 8

49009. Chrome Bath Help: Chrome to Acid Ratio - October 7

34023. Nickel-Chrome plating on Brass Problems - September 29

61720. 61720-2i Hard Chrome VI plating throwing power problem vipInquirer often helps others, so especially deserves our help - September 23

61615. 61615-1i Zinc plating with blue passivation is yellowish at holes - September 23

61603. Zinc Plating has white & red rust without a cause - September 23

13356. Zinc Plating of 12L14 Leaded Steel - September 23

61738. Acid Zinc Plating Bath White Appearance - September 21

61734. Cleaning Porous Pot Cathodes - There's gotta be a better way! vipInquirer often helps others, so especially deserves our help - September 17

59181. Need Electroplating on 3D Printed Jewelry RFQ: San Diego, CA - September 17

61729. 61729-1i Is This a Chrome Plating Defect? - September 17

12243. 12243-1i Black Spots when Tin Plating Brass - September 9

61722. Lead plating of umbrella wires/tubes - September 7

17311. How to do copper plating on aluminum roller? - September 5

52602. Grayish black spots over time in zinc plating - August 29

61717. Separating copper and nickel for optics - August 28

61713. Accidentally Put Dechrome in Chrome Plating Tank - August 21

61710. Fluoborate Copper plating process - August 21

61709. Plating blisters observed on tin finish after annealing - August 21

61702. 61702-1i Zinc-Nickel Plating -- Dark Deposit in LCD Area - August 5

  1503. Platinum Plating: How to Determine Replenishment - August 3

See more threads in this category


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

584/27. "Water spots" on electroless nickel plated parts - 11/25/24

61763. Electroless nickel plating: white marks - October 31

34541. Electroless Nickel with PTFE Plating Problems - September 9

61724. Silver mirroring puddles on glass, oxidizes at the edges - September 8

61711. Need Cosmichrome in California RFQ: California - August 21

61608. Electroless copper plating onto wax - August 1

53623. Electroless Plating onto LCP Engineering Plastic - August 1

See more threads in this category



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

60771. High Temperature PVD Coatings - November 15

  7846. PVD coatings: color control Q&A's, Problems & Solutions - August 26

28527. Vacuum Metallizing Gets Hazing as soon as Top Coated - August 5

See more threads in this category



2f. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

61743. 61743-1i Galvanizing Vats Overheated ... Need supplies, lab equipment, etc. RFQ: Angola - October 13

61741. Agitation of Galvanizing Flux vipInquirer often helps others, so especially deserves our help - September 28

45309. 45309-1i White spots left by coolants on galvanized steel - August 19

61698. Planning a small HDG plant - August 18

38205. Galvanizing problem: Excessive aluminum in zinc - August 12

See more threads in this category



2g. BLACK OXIDE, BLUING, COLORING, PATINAS

61773. Black spots on chemically blackened brass - November 15

11776. Standards for Oiling of Black Oxided Parts - October 15

36214. 36214-1i Formula for cold blackening / cold black oxide - October 6

  1150. 1150-1i How to Get Clear Coat Look from Gun Bluing? - August 3

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

28621. Geomet 750 Hp galvanizing - August 6

55366. Ferritic Nitrocarburizing has red color to it? - June 15

52675. Process Comparison for Tufftriding and Nitriding - March 20

40139. Rust spots on pickled coil after a few days - September 1



3. ORGANIC FINISHING [PAINT, POWDER COATING] . . .

3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS



See more threads in this category


3b. POWDER COATING

52455. Actual costing of powder coating in India - October 6

61704. Powder Coating on Zinc Plating with White Rust - August 20

See more threads in this category



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

  5418. Clear Coating Black Oxided Stainless Steel? - November 18

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

61730. Epoxy ink fisheyeing on TGIC-polyester powder coating - September 10

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4. POST-TREATMENTS

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

38577. Need Iridite 17p RFQ: California - September 7

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

26968. Properties of 2024 T351 - August 13

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4c. STRIPPING, REWORKS, ETC.

adv. metalx

61754. Zinc Phosphate stripping for coating weight - 11/25/24

11499. Stripping TiN (Titanium Nitride) Coating from Titanium - 10/31/24

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5. SUPPORTING ISSUES

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

32952. Diphenylcarbohydrazide Trivalent/Hexavalent Chrome Testing - November 23

61778. Need to create pitting corrosion on stainless steel - November 23

  2183. Can you reliably measure nitric acid concentration with specific gravity gauge? - October 13

See more threads in this category



5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

61746. Determining if WWT sludge is hazardous? - October 9

12375. Remove Copper from Plating Waste - September 23

61714. Sludge from ETP plant - August 21

See more threads in this category



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

20858. Toxicity of nickel silver punch bowl - November 1

40657. Inhaled fumes from Bleach and C.L.R. accidentally mixed - September 20

61727. Popping Popcorn in Galvanized Buckets -- is it safe? - September 8

32977. Diatomaceous Earth and Shellfish Allergies? - August 21

See more threads in this category



5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

61779. Ideas for heating an alkaline zinc bath? - 11/25/24

59993. 59993-1i Exhaust method & calculations for plating tanks - November 18

39155. Stripping plastisol from plating racks - November 12

61757. Ideas for heating an alkaline zinc bath - October 21

11465. Sludge buildup on heating coils in phosphating tank - October 10

123/73. Zinc oxide production by French process? - September 19

617/33. Heating Chrome tanks with Hot Water in Lieu of Steam - September 16

61721. Titanium Grade for Aluminum Anodizing Jigs - September 7

43515. Air Agitation of HCl Pickle Tank - August 14

See more threads in this category



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

34214. MIL-DTL-5541 Adhesion tape testing with 3M #250 discontinued - November 23

61769. ASTM B700, Type II, Grade D, Class N vs. Class J? - November 18

61753. What is Phosphate Treatment 5.1.3.3 from spec 1.9.3? - October 30

61758. Did Wahl Clippers Have Cadmium Plating in the 1970s? - October 21

61632. Does MIL-C-5541 forbid a "Do Not Etch" instruction? - September 17

42362. MIL-C-5541 Chemical Conversion Coat -- Legacy Q&A's - August 26

See more threads in this category



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

61766. What is Black Luster® Finish for Fasteners - October 31

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5g. MOSTLY METALLURGY; Heat Treatment

61777. 3d printed Inconel 718 part turns blue in vacuum heat treatment - November 16

See more threads in this category



5h. PRECIOUS METAL RECOVERY

33616. Gold Recovery for Dummies - September 28

27814. How to Recover Platinum from Catalytic Converters - August 2

See more threads in this category



6. NON-INDUSTRIAL ISSUES

Hobbyists, DIY, Around Home

19039. Cast Iron Cook Stoves: restoration hints plus where to find parts and info - 11/27/24

61780. 61780-1i Preparing Part for Replating with Chrome - 11/27/24

33956. How to darken aluminum. Want golden yellow look on aluminum - November 16

20240. 20240-6a Penny isn't copper color - what do I have? - October 29

18519. Cleaning & polishing gold plated flatware - October 24

61756. Anodizing aluminum: dye is splotchy - October 21

28963. What could be causing the pitting and corroding to chrome fixtures - October 8

  2662. Preserving heat coloring of copper when clear coating - October 6

44380. Nickel plating, how much SLS for wetting agent? - October 6

30186. Lime-Away Damaged Stainless Steel Sink - September 19

33143. Stiffel Lamps: need screws that hold laurel leaves - September 10

22903. Ospho prep left tacky film - September 8

61718. 61718-1i Barbell discolored in storage - September 2

19105. Found a silver penny - August 29

16304. 16304-1i Need 29 Emtek Brass Door Knobs Refinished RFQ open to all: Texas - August 28

38628. Gold plating of lead - August 28

12841. Arcing, Popping & Hydrogen "Explosions" in Plating - August 27

38137. How to Paint Bathtub Jets - August 19

37205. Sterling silver vs. silver plate -- How to tell? - August 11

10664. Touching up powder coated aluminum outdoor furniture (Tropitone) - August 10

55951. Home nickel plating with vinegar and salt - August 1

  8575. Remove Water Stain from Teak - August 1

60191. Restoring black exterior door hardware - August 3

16699. Want Geneva Metal Kitchen Cabinets RFQ open to all: New York - August 2

See more threads in this category



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

61739. Electroplating V, Zr and Ti - September 28

61719. Electroplating: Role of a chemist - September 10

28889. Measuring the pH of air - August 24

61712. Galvanic Issues with Nickel-Plated Aluminum vs. Stainless? - August 21

See more threads in this category



6c. K-12 Science Projects, Grammar & High School Student Questions



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6d. The Artists' Corner

  6507. benzotriazole Benzotriazole and substitutes for brass corrosion control - November 16

61750. 61750-1 Forcing a white patina on zinc for watch dials - October 11

24061. Finish for Bare Steel -- linseed oil? - August 10

See more threads in this category



7. DRIFTED OFF FINISHING, BUT INTERESTING :-)

14342. 14342-2i Is it a Stiffel? - 11/28/24

12873a. Removing Silica Water Stains - November 23

30479. Copper corrosion and blue water in residential water system - November 18

29370. 29370-44a Marking system for rings, Hallmarks - November 13

44190. Problem related to cyanide addition - November 13

61765. Is Spirits of Nitre or Paregoric good for your nerves? - October 31

26801. Solving an electrolysis problem in home plumbing - October 25

  2259. High Temperature Adhesive for Mica to Silicone Rubber - September 23

23897. 23897-12i Identify this unique lamp - August 18

61706. 61706-1i Kitchen Floor Stained by Glue Trap - August 18

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