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 0. Choosing a Finish (corrosion, compatibility)
  1. Preparing the part (mech. prepchem. pretreatmasking & racking)
    2. Metallic Finishing (stainless & titaniumanodizing & light metalselectroplatingelectroless platingPVD & vacuum processesgalvanizingbluingother 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, DIY, around homeresearch, thesisK-12 scienceArtists' Corner)
                7. NOT Metal Finishing (off topic but interesting)

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

• Max. Temp for plated silver Thanks! Resolved :-) - July 22

• Powder Coating vs. Liquid Paint - July 21

• Chemical resistance of nickel plating - July 18

• Which stainless steels are Magnetic - July 2

• Need Chicago screws in 3 colors RFQ Krakow, Poland - June 17

61464-2i Coating for Spillway Gate Chains open Q. - June 16

• 202 SS or 304 SS for Baby Cutlery items open Q. - June 14

• Anti-corrosion coatings for Railway Track open Q. - June 13

49101-1 Galvanic Compatibility of Aluminum & Stainless Steel - June 13

27752-1i Why don't air conditioner condensers suffer galvanic corrosion from aluminum fins on copper tubing? - June 6

• Galvanic compatibility of aluminum guards on copper gutters open Q. - June 3

See more threads about "Corrosion, Compatibility, Choosing a Finish"



1. PREPARATION . . .

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

• Grinding hard Chrome with grinding oil vs water miscible open Q. - July 18

• Formula for polishing and buffing compounds - July 16

• Very High Bond tape doesn't stick to mirror polished stainless steel - June 21

• Is there any Roughness Standard under N1 / Ra 0.025 ? open Q. - May 24

• 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

See more threads about "Mechanical Prep [grinding, polishing, vibratory finishing, buffing, honing]"


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

• Oversize bore developed during phosphating open Q. - August 6

• Surface Activation for Phosphating open Q. - July 27

• Manganese phosphate coating: issues and answers open Q. - July 26

Zinc Phosphate coating problems & issues on aluminum open Q. - July 18

• Additives to Anodic Cleaning Solutions - July 12

8164 Sludge Issues in Zinc Phosphating - July 4

• Electrolytic cleaning: anode to cathode ratio - June 3

• Mn phosphating formula for couplings for pipes & treads open Q. - May 29

• Alternatives to Phosphating open Q. - May 27

13366-7i Zinc Phosphating: Yellow Stain only on GI sheets open Q. - May 27

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

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

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

See more threads about "Pretreatments [Cleaning, Pickling, Etching, Phosphatizing, Activation]"


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

adv. maskcoat banner 

• Masking material / method for electroless nickel plating open Q. - July 25

• Etching problems with PCB tin resist open Q. - July 18

• How to mask glass bangles for PVD coating open Q. - June 18

3836-2i Tape is causing Anodizing defects - May 12

See more threads about "Masking, Racking, Taping, Plugging, Photosensitive Masks"



2. METALLIC & INORGANIC FINISHING . . .

2a. STAINLESS STEEL & TITANIUM PROCESSING

• Electrical Properties of Passivated Stainless Steel - July 20

• Hydrofluoric acid vs. ammonium-bifluoride in cleaning & pickling - July 20

• Activation of stainless steel for plating open Q. - July 8

5422-6i Dark frosty cloud dull finish in electropolishing open Q. - July 3

56202-4i Stainless steel passivation problem: color inconsistent - June 28

• Stainless Passivation Temperature Ranges - Why is 90-120 °F excluded? - June 28

33504-1i Titanium galling & anodize/oxidize wear resistance - June 28

• Electropolishing 304 stainless steel, or alternatives to it - June 21

19226-4i Need titanium bolts & washers blackened RFQ: Tucson AZ - June 9

electropolishing problems 'Frosted marks' from electropolishing? open Q. - June 8

See more threads about "Stainless Steel & Titanium processing"



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

• Anodizing current stuck at 1/4 of what it should be open Q. - August 6

• Tin plating on Aluminum -- is intermediate layer of copper needed? - July 29

• Alkaline etch of aluminium prior to powder coating Thanks! Resolved :-) - July 27

• Anodizing on reflectors - July 23

• Spalling of sulphuric acid anodizing open Q. - July 23

• Remove dye but not electrocoloring from anodized aluminum open Q. - July 20

44945-1i White Powder/Salts on Anodized Aluminum open Q.

• 7075-T6 Poor anodising appearance related to minor differences in composition? - June 23

• Need Phosphoric acid anodize ASTM-D-9399 RFQ: Thailand - June 17

• Discoloration of MIL-5541 Alodine - June 13

• Can chem-film resist ultrasonic cleaning? - June 12

• Problems with Alodine/Iridite/Chem-film and Blind Holes - June 9

• Salt spray test hours for anodized aluminum - June 3

• Aluminum Alloy Rotogravure Cylinder Problems & Solutions open Q. - June 3

See more threads about "Anodizing & Light Metal treatments"


  

2c. ELECTROPLATING and ELECTROFORMING

• Hard chrome plating has high coefficient of friction, not low open Q. - August 6

• Residue when Drawing a Tinned Copper Wire open Q. - August 4

• Plating time too high in alkaline non-cyanide zinc plating open Q. - July 29

• Precipitating stannic ion from tin bath open Q. - July 29

• How to specify Conductive Black Zinc open Q. - July 28

• Cadmium plating and trivalent chromate - July 27

• Immersion gold plating Q&A's, Problems & Solutions - July 20

4996-4i Really bad adhesion and lack of shine in Hard Chrome plating open Q. - July 19

17929-2i Nickel plating over copper flash history - July 16

• True that cast iron can't be Zinc Plated? open Q. - July 16

• Copper plating on Inconel adhesion problem open Q. - July 15

• Discoloration of bright acid tin plating - July 12

• Platinised titanium (or niobium) anodes for hard chrome plating? open Q. - July 12

• Effect of Temperature on Alkaline Zinc Plating Operation - July 4

• Must do Acid Copper Plating with no additives - July 2

See more threads about "Electroplating & Electroforming"


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

• Electroless nickel-boron plating open Q. - August 9 yesterday

• A method for electroless zinc plating using ionic liquid - open Q. - August 7

• Need help with electroless/immersion tin plating open Q. - July 20

• Immersion gold plating vs. electroless gold plating - July 9

• EN Plating on Aluminum shrunk the parts but increased hole diameters - July 4

• Palladium activation & Plating on Plastic open Q. - June 26

• 'Contact' plating questions open Q. - June 21

open Q. - August 7 >• Stability Problems with Electroless Palladium Solution open Q. - June 17

• Heat treatment of Electroless Nickel for 400-500 Vickers - June 6

• Poor adhesion of Electroless Nickel Plating onto steel - June 2

• Electroless Nickel Plating for wet sour service open Q. - June 2

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

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

See more threads about "Electroless, POP, Immersion plating, Chrome-look sprays, Liquid metal coatings"



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

7846-4i PVD coatings: color control - July 22

• How to get Black PVD finish - May 22

• Masking in PVD process open Q. - March 25

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

50847-1i Diamond Like Carbon (DLC) Coating Coming Off After Steam Autoclave - March 16

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



2f. GALVANIZING, ALUMINIZING, HOT TIN DIPPING

• Hot dip galvanizing: what is reasonable dross & ash material loss? open Q. - August 9 yesterday

56867-10i Spotting, Blackening of Hot Dip Galvanized Fasteners open Q. - July 16

• Pickling/galvanizing 304 stainless steel - July 9

• Need re-galvanizing of metal shelving RFQ Limpopo, So. Africa - July 9

• Lifespan of galvanized sheet metal? - June 24

• Continuous Sheet Galvanizing: wrinkling/creases/heat buckling problem open Q. - June 16

• Some Galvalume Panels Are Turning Black open Q. - June 8

• Types of zinc used for galvanizing: PWZ vs.GOB for solar profiles - June 2

• Surfactants used in preflux and blanket flux Thanks! Resolved :-) - May 30

• Spinning and rolling to clean threads after galvanizing - May 27

57163-6i Galvanizing defects: black patches open Q. - May 20

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

See more threads about "Galvanizing, Aluminizing, Hot tin dipping"



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

• Black Oxide process: removing dust efficiently open Q. - July 27

• Mid temperature blackening smut issue open Q. - June 13

61453-1i Rust on black oxide parts open Q. - June 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



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



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

3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS

45618-1i E-coating over Zinc or Zinc Cobalt Plating -- Problems & Solutions open Q. - August 9 yesterday

• Water spots & water or paint flow marks after curing - July 16

32574-9i Chalky, ashy CED (cathodic electrodeposition) coating - July 12

• Need CED coating service in Chennai RFQ Chennai India - June 16

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



3b. POWDER COATING

• Blisters/ Peeling of Powder Coating on Zinc Plating open Q. - June 23

• Powder Coating Galvanized Steel open Q. - May 17

1618-1i 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)



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

• Clear coating brass, copper and bronze open Q. - July 3

• Clearcoat for polished brass & copper bathtubs open Q. - June 27

45328-1i Water spot problem in CED open Q. - April 4

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



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

• Repairing damaged PVDF Coating open Q. - July 29

• How to make wrinkle paint open Q. - July 20

• Sublimation coating formula for ceramic mugs - July 16

• Need custom tins for liquor company RFQ Jacksonville FL - July 2

31579-1i Eliminate Pin Holes on Painted Wheels open Q. - June 27

• Plastisol Mixing Formulas and Improvements open Q. - June 6

• How to produce plastisol ink, pvc ink, and water based ink - May 29

• Paint moisture problem open Q. - May 14

• Hologram-like defect in automotive paint - April 25

• "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

See more threads about "Painting, Printing, Adhesives and Other organic coatings"



4. POST-TREATMENTS

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

• Answer to why Black Chromate turns green - July 15

• Is Zinc Plating with Chromate Conversion Coating RoHS compliant? open Q. - July 9

• 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



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

• How to improve the solderability of tin electroplating? open Q. - July 16



4c. STRIPPING, REWORKS, ETC.

• How to remove conversion coating used as maskant when anodizing? - August 6

• Cleaning Tin Stain from Nickel-plated Aluminum open Q. - July 29

• 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)



5. SUPPORTING ISSUES

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

• Simple test for presence of clear chromate - July 27

• Soak Cleaner / Degreaser: Alkalinity test & oil content - July 27

• Distilled water good enough for analysis open Q. - June 25

• Thickness measurement of gold & EN on copper open Q. - June 7

• Analyze Chrome Plating Bath; Determine Sulfates open Q. - June 6

• Chem filmed panels fail salt spray test - May 30

• Platinized titanium anodes for electroplating: buying, making, testing open Q. - May 29

• Analyze cobalt and nickel metal separately open Q. - May 26

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

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

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

See more threads about "Analysis, Lab technique, QA, Salt spray testing"



5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL

• Ferrous Chloride vs. Ferric Chloride for reducing H2S levels open Q. - August 6

• Trivalent Chromium vs. Hexavalent -- what are the differences? open Q. - July 27

61445-1i Defects on test panel left in the water - June 2

• 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



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

• Safety of Galvanized Steel in home-made DIY smokehouse - July 16

• Mercury Poisoning from thermometers open Q. - May 31

• Metallic taste when wearing copper bracelet open Q. - May 24

• 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

54906-1i Fumes from stainless pot left on burner sickened me - February 25



5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION

• Materials of construction for pump for zinc phosphate - July 18

• Looking for small custom titanium anode baskets RFQ: Guatamala - June 7

• Sludge buildup in phosphating piping - June 3

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

• Sodium hypochlorite (bleach) piping problems - May 19

• 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

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

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

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



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

• Phosphatizing standards -- MIL-DTL-16232 - August 9 yesterday

• Is MIL-PRF-23377 equivalent to BMS10-11? open Q. - August 4

• Meaning of plating spec abbreviation MFzn8S open Q. - June 12

• How to Make Artificial Sweat and Conduct Testing? open Q. - June 2

• 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)



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

•  How Did Kitchen Zinc become Sink? open Q. - June 26

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



5g. MOSTLY METALLURGY; Heat Treatment

• Hardening EN8 / EN9 parts open Q. - August 10 TODAY

• 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)



5h. PRECIOUS METAL RECOVERY

• Refining of silver chloride to silver metal open Q. - July 28

• Refining of Palladium and making its salt open Q. - July 16

• How to precipitate gold from HAuCl4 solution open Q. - July 12

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

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

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

• 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



6. NON-INDUSTRIAL ISSUES

Hobbyists, DIY, Around Home

• Dishwasher ruined shiny aluminum -- How to fix it? - August 6

• Need to find Hawes Lemon Oil - August 4

• Problems and solutions in copper electroforming - July 29

• How to Fix mercury damage to gold jewelry - July 29

• Could ashes from our bonfire have ruined the paint on neighbor's car? - July 27

• Sulfur springs turned my silver jewelry black. How to fix? - July 24

30186-2i Lime-Away damaged stainless steel sink - July 24

• Acid copper sulphate plating problem: copper concentration is growing - July 23

16032-2i Cleaning/restoring vintage tin humpback trunk - July 18

27662 Cleaning corroded pennies and coins - July 18

• Questions & Answers about Zinc or galvanized countertops open Q. - July 9

• 18K gold ring turned my finger black - July 8

• Kenrick 19th century cast iron open Q. - July 4

• Refinishing bronze table legs - July 4

See more threads about "Hobbyists, DIY, Around Home"



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

61452-1i Recovery of Metallic Magnesium from Magnesium Citrate. Is It Possible? - June 13

• Electrolytic Passivation of Nickel Plating - June 7

• Electroplating on 3D Printed & Stereolithography (SLA) models open Q. - June 6

• White Bronze Plating, an alternative to nickel? - May 30

• 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

Copper Plating on Sputtered Gold 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

See more threads about "Research, Thesis topics, University & Post-grad students"



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

• Why can't we store electricity in water? - June 14

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



6d. The Artists' Corner

41408-8i Painting cast iron fountains / restoring rusty fountains - August 9

• Archival painting on brass and copper open Q. - July 29

red spots when bronze casting Dark Reddish Spots when Bronze Casting - June 7

61446-1i What do black spots on aluminum sculpture tell art student? - May 25

61430-1i Strange reaction of copper BB on a bronze sculpture - May 2

47701-1i Protecting Metal Birds in the Tropics - April 23

49168-5i How to clean/repair C Jere metal sculpture open Q. - March 21



7. DRIFTED OFF FINISHING, BUT INTERESTING :-)

• Want to heat homes with chemical energy - August 6

• Muriatic Acid for fiberglass shower/tub - August 6

24359-19i Repair of barber chairs open Q. - July 29

14995-12i Fixing Brown Rusty Water (Excess Iron) in Swimming Pool Water - July 28

• Cast Iron Cook Stoves: Where to find parts and how to restore open Q. - July 27

• WW2 Naval Ship used Silver wiring open Q. - July 24

38809-16i Antique baby carriage restoration open Q. - July 23

• Copper Sulphate as Swimming Pool Algae Remedy? - July 18

32413-1i Sweet Spirits of Nitre - July 12

29370-29 Identifying rings and hallmarks open Q. - July 12

• Looking for a Magnet That Attracts Gold RFQ: Jeffersonville IN - July 9

• How to make bronze / History of bronze - July 2

• Hoyt Metal Co of Great Britain thermometer - July 2

24229-1i Making homemade acid stains for concrete open Q. - June 30

See more threads about "Drifted off Finishing, but Interesting"

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