C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/34 (2006.01)
Patent
CA 2594732
Chromate-free and metal phosphate free treatments and compositions for aPPlying a conversion or passivation coating for metals, more particularly, steel, zinc coated steel, and aluminum surfaces. The methods of the invention comprise contacting the requisite metal surface with a treatment composition comprising a member or members comprising one or more Group IV B elements, fluoride, and a phosphonic acid or phosphonate. Optionally, a silane may be added as a treatment component .
L'invention concerne des traitements et des compositions sans chromate et sans phosphate métallique permettant d'appliquer un revêtement de conversion ou de passivation sur des métaux, en particulier des surfaces d'acier, d'acier revêtu de zinc, et d'aluminium. Les procédés de l'invention consistent à mettre en contact la surface métallique nécessaire avec une composition de traitement contenant un ou des éléments parmi lesquels un ou plusieurs éléments B du groupe IV, le fluorure, et un acide phosphonique ou un phosphonate. Un silane peut éventuellement être ajouté comme composant de traitement.
Carey William S.
Carter Christopher M.
Chisholm Bret
Deck Philip D.
Engel Davidl B.
Chemetall Corp.
Company General Electric
Craig Wilson And Company
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