Corrosion inhibitive pigment

Details Corrosion inhibitive pigment Corrosion inhibitive pigment

1980-11-26

1982-07-27

Dees, Carl F.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106 1421, 148 62, C04B 3128, C09C 134

Patent

active

043415644

ABSTRACT:
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.

REFERENCES:
patent: 2156451 (1939-05-01), Grasshoff et al.
patent: 3189488 (1965-06-01), Schiffman
patent: 3189489 (1965-06-01), Schiffman
patent: 4161409 (1979-07-01), Schiffman
patent: 4183772 (1980-01-01), Davis

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