Corrosion inhibitive pigment

Details Corrosion inhibitive pigment Corrosion inhibitive pigment

C - Chemistry, Metallurgy

09

D

31/44

C09D 5/08 (2006.01) C09C 1/34 (2006.01)

Patent

CA 1154947

ABSTRACT OF THE DISCLOSURE Corrosion inhibiting pigments are obtained by partial reduction of a hexavalent chromium compound in aqueous solution obtaining a reaction product containing 5 to 95% of the chromium in lower valent state. In the aqueous reaction mixture there is incorporated a water-soluble or water-dispersible polymeric material capable of reacting with chromate to form an insoluble product therewith and the obtained mixture evaporated to dryness under controlled conditions, followed by subdividing the obtained dry mass to suitable size.

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