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Boric/Sulfuric Acid Anodize-Alternative to Chromic Acid Anodize
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Abstract
At the 1990 Annual Aerospace/Airline Plating and Metal Finishing Forum, The Boeing Commercial Airplane Group presented information on boric acid/sulfuric acid anodizing (BSAA) as a replacement for chromic acid anodizing (CAA) to meet environmental regulations.
This paper presents an update on the BSAA process and the status of production implementation. Background information will be reviewed including environmental issues and modifications of CAA to meet current EPA regulations.
The results of BSAA process optimization, corrosion protection performance and compatibility with aircraft finishing will be given. Production implementation experience such as process control and facility requirements, including the status of BSAA for MIL-A-8625, Type IC (Anodizing, Non-chromic Acid, Meeting Type I Requirements) usage will be reviewed.
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Citation
Koop, R. and Moji, Y., "Boric/Sulfuric Acid Anodize-Alternative to Chromic Acid Anodize," SAE Technical Paper 920944, 1992, https://doi.org/10.4271/920944.Also In
References
- Leland, T. Moji, Y. “An Alternative to Chromic Acid Anodizing” 26th Annual Aerospace/Airline Plating & Metal Finishing Forum & Exposition, SAE Technical Paper Series, No. 900953 April 23-26 1990
- Moji, Y. Wong, C. U.S. Patent No. 4,894,127 “Method for Anodizing Aluminum” January 16 1990
- Moji, Y U.S. Patent No. 4,504,325 “Method for Sealing an Aluminum Oxide Film” March 12 1985
- Mnich, J. “Non-Chromated Anodize Process for Corrosion Resistance and Adhesive Bonding” 1st International SAMPE Environmental Conference May 21-23 1991
- Holmquist, H. Tarr, L. U.S. Patent No. 4,793,903 “Method of Cleaning Aluminum Surfaces” December 27 1988