Composition and process for the treatment of phosphatized...

Details Composition and process for the treatment of phosphatized... Composition and process for the treatment of phosphatized...

C - Chemistry, Metallurgy

23

C

117/228, 31/43,

C23C 22/83 (2006.01)

Patent

CA 1197674

28 COMPOSITION AND PROCESS FOR THE TREATMENT OF PHOSPHATIZED METAL SURFACES ABSTRACT OF THE DISCLOSURE The invention relates to a composition and a process for the treatment, more precisely the "post-treatment" of phosphatized metal surfaces, particularly when the surfaces must be subsequently covered with a coat of paint. It relates also to a process for the preparation of the composition and a concentrate useful for this preparation. The composition com- prises an effective proportion of trivalent titanium compound and it is presented with an acid pH, the proportion of said compound being sufficient for the corresponding composition to confer on the treated metal surface a protection equivalent to that obtained with known chromatizing solutions. More par- ticularly, the composition contains trivalent titanium at a concentration of 0.01 to 2 g/l, preferably from 0.2 to 0.6 g/l and has a pH of 2 to 7. Reducing means can be arranged to regenerate the trivalent titanium in the treat- ment solution continuously.

420493

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