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Bromate deoxidizer for aluminum Q&A, Problems & Solutions

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SUGGESTED ANODIZING & CHROMATING BOOKS
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"Aluminum How-To" -- Chromating, Anodizing, Hardcoating by Robert Probert (2005)
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"The Metallurgy of Anodizing Aluminum" by Jude Mary Runge (2018)
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"The Surface Treatment & Finishing of Aluminium and Its Alloys" by Wernick, Pinner & Sheasby (1959 - 2001)
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"Surface Treatment and Finishing of Aluminum" by Robert King (1988)
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"Anodic Oxidation of Aluminum and Its Alloys" by V. F. Henley (1982)
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"The Technology of Anodizing Aluminum" by Brace (1979)
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"Aluminum Finishes Process Manual" by Reynolds Aluminum (1973)
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"The Anodic Oxidation of Aluminum" by A. Jenny (1940)
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"Anodizing and Coloring of Aluminum Alloys" by S. Kawai (2002, VERY RARELY avail)
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Q. I am the Q.C. and Environmental Manager for a small anodizing and plating job shop. Years ago we went away from chromated de-oxidizers and have been using an iron based deoxider ever since. Sometimes we even mix it up ourselves using raw chemicals instead of a proprietary product. I read an article recently that mentioned sodium bromate as a deoxidizer for aluminum but it did not elaborate on concentration or any other ingredients. Does anyone have a recipe that we might try?

Guy Lester
plating co. - Ontario, California, USA
2002

? Would you give us the reference for that article, name, publication, issue?

Thanks,

Tom Pullizzi
Falls Township, Pennsylvania

If I'm not mistaken (I seem to have misplaced the issue) the bromate deoxidizer was referred to in the December 2001 issue of Metal Finishing in the article "An Overview of Non-hexavalent Chromium Conversion Coatings - Part 1, Aluminum & Its Alloys"

Guy Lester
plating co. - Ontario, California, USA

? Did not see article but was the use of peroxy oxidizers suggested?

Geoffrey Whitelaw
- Port Melbourne, Australia

A. I own a small metal finishing chemical manufacturing company and we make a bromate deox. It's our own formula, and I don't know how the inventor came up with it because he won't tell me. Probably ripped off from the US military in the 80's.

Greg Page
- Salt Lake City
March 5, 2023

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