Corrosion protection agent and corrosion protection method...

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 22/34 (2006.01) C23C 22/08 (2006.01) C23C 22/36 (2006.01) C23C 22/83 (2006.01)

Patent

CA 2453138

The invention relates to an agent and method for carrying out the corrosion protection treatment of a metal surface. The invention is characterized in that the metal surface is brought into contact with a homopolymer or copolymer of vinyl pyrrolidone, whereby the application solution contains: a) 0.02 to 20 g/l phosphoric acid and/or at least one fluoro acid of one or more elements of the group Zr, Ti, Hf and Si or of each of their anions, and; b) 10 to 49.9 mg/l of a homopolymer or copolymer of vinyl pyrrolidone.

L'invention concerne un agent et un procédé pour le traitement anticorrosion d'une surface métallique, ce procédé se caractérisant en ce que l'on met en contact la surface métallique avec un homopolymère ou un copolymère de vinylpyrrolidone, la solution utilisée contenant: a) 0,02 à 20g/l d'acide phosphorique et au moins un acide fluorique d'au moins un élément du groupe Zr, Ti, Hf et Si ou bien des anions respectifs de ceux-ci, b) 10 à 49,9 mg/l d'un homopolymère ou d'un copolymère de vinylpyrrolidone.

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