Chromate-free method for surface etching of aluminum and...

Details Chromate-free method for surface etching of aluminum and... Chromate-free method for surface etching of aluminum and...

2006-02-21

2006-02-21

Norton, Nadine G. (Department: 1765)

Compositions

Etching or brightening compositions

C252S079200, C252S079300, C438S745000, C216S100000, C216S102000, C216S105000, C216S108000, C216S109000

Reexamination Certificate

active

07001533

ABSTRACT:
Non-chromate solutions for treating and/or etching metals, particularly, aluminum, aluminum alloys, steel and titanium, and method of applying same wherein the solutions include either a titanate or titanium dioxide as a “drop-in replacement” for a chromium-containing compound in a metal surface etching solution that otherwise would contain chromium.

REFERENCES:
patent: 4100015 (1978-07-01), Russell
patent: 4728456 (1988-03-01), Yamasoe et al.
patent: 5052421 (1991-10-01), McMillen

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