Corrosion inhibiting pigment and a process for the manufacturing

Details Corrosion inhibiting pigment and a process for the manufacturing Corrosion inhibiting pigment and a process for the manufacturing

1989-02-22

1991-07-09

Lieberman, Paul

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106 1405, 106 1412, 106459, 148262, 423305, C04B 1400, C04B 1434, C09C 104, C09C 122

Patent

active

050302850

ABSTRACT:
The pigment comprises a mixture of crystalline phase and an amorphous phase in which the crystalline phase represents from 10 to 70 wt % of the mixture and is constituted by zinc phosphate in the form of substantially spheroidal particles having a maximum size of between 0.5 to 5 microns and the amorphous phase represents from 30 to 90 wt % and comprises ferric phosphate and ferrous phosphate in a mole ratio lying between 1:001 and 1:03.
The process comprises a reaction giving ferrous phosphate, partial oxidation thereof and association with zinc phosphate.

REFERENCES:
patent: 3493411 (1970-02-01), Clay
patent: 4294808 (1981-10-01), Wasel-Nielen et al.
patent: 4330345 (1982-05-01), Miles et al.

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