Iron oxide-based anti-corrosion pigments

Details Iron oxide-based anti-corrosion pigments Iron oxide-based anti-corrosion pigments

1978-07-10

1980-07-08

Gantz, Delbert E.

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

106296, 106304, 106306, 106 1439, 106 1425, C09D 508, C09C 104, C09C 124, C09C 102

Patent

active

042115655

ABSTRACT:
An anti-corrosion pigment comprising about 30 to 70 mole % of an oxide of at least one metal selected from the group consisting of magnesium, calcium and zinc, about 70 to 30 mole % of Fe.sub.2 O.sub.3, and up to about 20 mole % of Cr.sub.2 O.sub.3, the pigment having a specific surface of about 1 to 30 m.sup.2 /g and exhibiting a weight loss of less than about 0.05% per gram of pigment by the Thomson corrosion test, is produced by calcining the corresponding metal oxides. The temperature is about 200.degree. to 650.degree. C. in the absence of chromium and about 200.degree. to 900.degree. C. when chromium is present.

REFERENCES:
patent: 2090476 (1937-08-01), Fireman
patent: 2502130 (1950-03-01), Downs et al.
patent: 3832455 (1974-08-01), Smith et al.
patent: 3904421 (1975-09-01), Shimiga et al.
Shinoda, W., "Pigments for Corrosion-Preventing Coating Materials," Chem. Abstracts, 12/2/74, #137676s.
Alien Property Custodian, S.N. 368,408 Published, 7/13/43; Diehl.

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