Title: Process for sealing anodic oxidation layers on aluminium surfaces and its alloys

Abstract: This invention relates to a process for sealing alumina layers formed on the surface of aluminum and its alloys by anodic oxidation, and to the composition for effecting such sealing. The process, which is preferably carried out at room temperatures for purposes of economy, comprises contacting said layer with an aqueous composition which includes phosphate ions, trivalent chromium, and an emulsified organic resin.

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Inventors: Fabregas, Juan Brugarolas

Application Number: 750541
Filing Date: 1976-12-14
Publication_date: 1978-04-11
Assignee:
Primary Class(es): 427/409 148/251, 205/204
Other Classes:
US Patent Ref:

2562117	Jul, 1951	Osdal	148/6.
2777785	Jan, 1957	Schuster et al.	148/6.
3094435	Jun, 1963	Schuster et al.	148/6.
3094441	Jun, 1963	Curtin et al.	148/6.
3175964	Mar, 1965	Watanabe et al.	148/6.
3346522	Oct, 1967	Schuster et al.	148/6.

Other Refs:
Primary Examiner: Kendall, Ralph S.
Assistant Examiner:
Attorney: Basseches; Mark T., Basseches; Paula T.