Chromium-free conversion coating and methods of use

Details Chromium-free conversion coating and methods of use Chromium-free conversion coating and methods of use

C - Chemistry, Metallurgy

23

C

C23C 22/34 (2006.01) B05D 7/24 (2006.01) C09D 163/00 (2006.01)

Patent

CA 2251374

Methods and compositions for providing a conversion coating to a metal surface are provided. The methods comprise applying to a metal surface an aqueous composition comprising a diglycidyl ether of Bisphenol A, a fluoacid, and a silicon compound containing a hydrolyzable group.

L'invention porte sur des procédés et des compositions permettant de réaliser un revêtement par conversion sur une surface métallique. Ces procédés consistent à appliquer sur une surface métallique une composition aqueuse comprenant un éther de diglycidyle de bisphénol A, un fluoacide et un composé de silicium contenant un groupe hydrolysable.

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