C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/12 (2006.01) C23C 22/10 (2006.01)
Patent
CA 2214398
The invention relates to a bath and to a process for the phosphatization of metallic substrates as well as a metallic substrate having been subjected to said treatment by the said bath and process. The bath according to the invention, whose pH is from 1 to 5.5 and comprising the classical components of the phosphatization baths, is characterized by the fact that it comprises - from about 0.3 to about 25 g/l of zinc ion, preferably from 0.5 to 10 g/l, - from 5 to about 50 g/l of phosphate ion, preferably from 8 to 30 g/l, et - from about 0.01 to about 10 g/l, preferably from 0.03 to 3 g/l of a trivalent cobalt complex represented by one of the formulae (I) or (II). No figure.
L'invention concerne un bain et un procédé pour la phosphatisation de substrats métalliques ainsi qu'un substrat métallique exposé audit traitement dans ledit bain et par ledit procédé. Le bain de l'invention, dont le pH varie de 1 à 5,5 et comprenant les constituants traditionnels des bains de phosphatisation, est caractérisé par le fait qu'il comprend - d'environ 0,3 à environ 25 g/l d'ion zinc, préférablement de 0,5 à 10 g/l, - de 5 à environ 50 g/l d'ion phosphate, préférablement de 8 à 30 g/l, et - d'environ 0,01 à environ 10 g/l, préférablement de 0,03 à 3 g/l d'un complexe de cobalt trivalent représenté par une des formules (I) ou (II). Pas de figure.
Bernard Daniel
Droniou Patrick
Guimon Michele
Schapira Joseph
Sudour Michel
Bernard Daniel
Cfpi Industries
Droniou Patrick
Goudreau Gage Dubuc
Guimon Michele
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