C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/34 (2006.01) B05D 3/10 (2006.01) B05D 7/14 (2006.01) B32B 15/08 (2006.01) C09D 183/04 (2006.01)
Patent
CA 2613639
The invention provides a method for chemical conversion treatment by which a chemical conversion layer attaining satisfactory substrate-covering properties, adhesion to coating and corrosion resistance can be formed on any metal structure surface. A method for chemical conversion treatment by treating a metal structure with an agent for chemical conversion treatment, wherein the agent contains zirconium, fluorine, an amino -containing alkoxysilane, and a hydroxyl-containing alkoxysilane with the contents of zirconium and the amino-containing alkoxysilane being 100 to 700ppm in terms of metal and 50 to 500ppm in terms of solid matter respectively at a fluorine/zirconium molar ratio of 3.5 to 7.0 and has a pH of 2.8 to 4.5.
La présente invention concerne un procédé de traitement par conversion chimique grâce auquel une couche de conversion chimique possédant des propriétés satisfaisantes de couverture du substrat, d'adhérence au revêtement et de résistance à la corrosion peut être formée sur la surface de n'importe quelle structure métallique. Le procédé de traitement par conversion chimique comprend le traitement d'une structure métallique par un agent qui contient du zirconium, du fluor, un alcoxysilane contenant un amino et un alcoxysilane contenant un hydroxyle, les teneurs en zirconium et en alcoxysilane contenant un amino étant respectivement de 100 à 700 ppm en termes de métal et de 50 à 500 ppm en termes de matière solide, à un rapport molaire fluor/zirconium de 3,5 à 7,0 et à un pH de 2,8 à 4,5.
Ando Katsutoshi
Murai Yasuhito
Shinomiya Mitsuo
Goudreau Gage Dubuc
Honda Motor Co. Ltd.
Nippon Paint Co. Ltd.
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