Category: "Anodizing and light metal treatments (Aluminum, Magnesium)"

  4422. Aluminum Anodizing Color Match Problems open Q. - December 30

14441. White spots in black anodizing open Q. - December 29

61610. Large Plate anodizing problems - December 27

61623. Contaminant Build up in Anodize Line Rinse Tanks open Q. - December 13

6326. Hard anodized parts are matte & dull; should be smooth & shiny - December 11

36602. Black rubs off anodized parts - November 25

33883. Problems in Plating on Aluminum, including alloy selection - November 21

21693. Sealing Aluminum to prevent oxidation? - November 9

61589. Snowflake corrosion on Duranodic anodized parts - October 25

47152. Dissolving aluminum with caustic soda - October 24

61581. Black anodize gets white stains only on large sheets - October 22

56514. Minimum time between chem-film and priming - October 22

14122. Re-anodizing Aluminum which has been previously anodized - October 19

37104. Trying to mild etch High Mg Al alloy open Q. - October 8

  0606. Water quality / chloride contamination in anodizing open Q. - October 5

22496. De-smutting/De-Oxidizing of aluminum - October 3

• Teflon Coating on Aluminum open Q. - October 2

• Anodizing supplier is RoHS compliant but not RoHS certified? open Q. - September 29

• Looking to permanently whiten aluminum open Q. - September 23

• Failed Taber testing on hard anodizing open Q. - September 18

• Two-step black color anodizing Q&A, Problems & Solutions open Q. - September 15

• Dissolving aluminum with caustic soda - September 15

• Reduce anodize thickness by leaving in tank with power off? - September 14

• Chromate Conversion Coating of Cast Aluminum: Problems & Solutions open Q. - September 14

• Gold hard anodising with anti-bacterial silver open Q. - September 14

• I need to to know exact chemical composition for MIL-DTL 5541 conversion coatings - September 1

• Caustic Etch Analysis -- aluminium anodizing open Q. - August 26

• Calculations & formula to reach 25 micron [0.001"] anodizing thickness open Q. - August 23

• Preventing yellow/tan discoloration of molded aluminum open Q. - August 15

• Black spots problem in anodized aluminum - August 15

• Will black anodized chassis dissipate heat better than clear open Q. - July 20

• Zincate formulas for plating on aluminum open Q. - July 6

• Can sealant surfactants be removed? - June 30

• Coating mass/weight for ASTM B449 colorless - June 29 Inquirer often helps others, so especially deserves our help

• Aluminum Anodizing Color Match Problems - June 25

• Alodine 1200 is now coming out clear instead of dark - June 25

• Anodized aluminum refuses to dye - June 25

• Want very thin Anodizing on Aluminum open Q. - June 20

• Anodized Aluminium edges not taking dye very well open Q. - June 19

• Need black anodizing that is UV-proof - June 9

• Alodine is too dark! - June 8

• Sandblasting of aluminum diecastings - June 8

• Not very successful yet at anodizing - June 8

• Alkaline Etching Bath gets used up really fast - June 8

• Need 'perfect' yellow chromate conversion coating - June 8

• Zinc-nickel plating on aluminum Q&A, Problems & Solutions - June 8

• 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

• Aluminium Wire Rod Surface Problem open Q. - May 16

• Corrosion of anodized 7075 T73 vs 7075 T6 aluminum open Q. - May 5

• Touching up anodizing with Alodine/Iridite/Chem-film/Chromate open Q. - April 27

• Customer wants bright black anodizing on ADC12 - April 14

• Problems achieving shiny/glossy anodizing - March 23

• "Neutralizing" sulfuric anodizing solution with nitric acid - March 5

• Bulk anodizing for aerospace open Q. - March 2

• 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

• Bending aluminum: best alloys and lubricants open Q. - January 19

• Aluminum anodizing: Constant current vs. controlling the voltage - January 11

• Thickness of Alodine/Iridite/Chemfilm on Aluminum - January 3

• MIL-DTL-5541 Chem film fails humidity test - January 2

• Burning problem in Hard Anodizing of Aluminum open Q. - January 1

• Anodising thickness not being achieved - December 31

• Aluminum Anodizing Color Match Problems - December 22

• Anodizing Discolorization "Leopard Spots" - December 21

• MIL-C5541-Class 3 Question - December 20

• Chromic Acid Anodizing: Parts are too dark open Q. - December 17

• Stains in Electrocolouring of aluminum - December 6

• Pitting and black spots during Anodizing - November 27

• Chromic acid anodizing wasn't sealed. What now? open Q. - November 23

• Problem anodizing 7075 (7xxx) aluminum open Q. - November 22

• Iridite 14-2 pH Wipe Test open Q. - November 18

• Can duplex sealing enhance black dye stability? - November 15

• Need Chromating on Aluminium Castings for SST of 400 hours RFQ Pune, India - November 8

• Anodised aluminium temperature resistance - November 3

• Three-in-one aluminum pretreatment process? - October 27

• Type III hard anodize parts burning at the bottom of rack open Q. - October 22

• Need Screws for Anodizing Racking RFQ Bay Area CA - October 22

• Process flow for silver plating on aluminium - October 15

• Certification of Sulfuric Acid Anodizing voltage open Q. - October 14

• White spots on 2000/7000 series aluminum only after sealing - October 11

• Problems in cold sealing of anodized aluminum profiles - October 10

• Type III hard anodizing and Taber Abrasion testing - October 10

Inconsistent colour change in anodising; grainy & uneven color - October 8

• "Clear" Anodize on 6061 is Champagne, not Clear open Q. - October 5

• Need Bulk Anodising Service (or Setup) RFQ: Hungary - September 22

• Anodize Aluminum Nickel Bronze? Thanks! Resolved :-) - September 20

• Anodized aluminum in deionized water - September 16

• Anodizing for Electrical Resistance / Dielectric open Q. - September 9

• Aluminium corrosion and sodium stannate open Q. - August 16

• 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 sulfuric acid anodizing open Q. - July 23

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

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 D9399 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

• Constant voltage anodizing issue: Current out is higher than current in open Q. - May 27

• Extend Alkaline etching bath life by decanting? open Q. - May 26

• Burning problem in Hard Anodizing of Aluminum - May 26

• White spotting on black anodising - May 25

• Black spots on anodized surfaces - May 25

• Conversion Coating Process (Chromating?) for Mazak (Zamak) open Q. - May 24

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

• 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)