Method and composition for forming a non-chrome conversion...

C - Chemistry – Metallurgy – 23 – C

Patent

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C23C 22/36 (2006.01) C09D 5/08 (2006.01) C11D 1/722 (2006.01) C11D 3/02 (2006.01) C11D 11/00 (2006.01) C23C 22/83 (2006.01)

Patent

CA 2578965

Chromate free treatments and compositions for applying a conversion or passivation coating to metal surfaces. Preferred compositions comprise a film forming latex polymer, fluoacid, phosphoric acid, and a polyoxyethylene/oxypropylene block copolymer. The requisite metal surfaces are contacted by the compositions and dried. Rinsing is optional.

L'invention concerne des traitements et compositions exempts de chromate qui permettent d'appliquer un revêtement de conversion ou de passivation sur des surfaces métalliques. Des compositions préférées comprennent un polymère de latex filmant, un fluoacide, un acide phosphorique et un copolymère bloc polyoxyéthylène/oxypropylène. Les surfaces métalliques requises sont mises en contact avec les compositions et séchées. Le rinçage est optionnel.

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