Environmentally pollution-free anti-corrosion pigment...

Details Environmentally pollution-free anti-corrosion pigment... Environmentally pollution-free anti-corrosion pigment...

2008-10-23

2010-11-09

Green, Anthony J (Department: 1793)

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

C106S461000, C106S462000, C252S387000

Reexamination Certificate

active

07828884

ABSTRACT:
The present invention provides an environmentally pollution-free, anti-corrosive pigment composition which is free of any heavy metal such as lead and/or chromium, which is free of zinc and/or water-soluble ions and which is excellent in the anti-corrosive effect. The anti-corrosive pigment composition comprises condensed calcium phosphate prepared by firing a mixture which comprises a calcium-containing component and a phosphorus-containing component and in which the molar ratio (Ca/P=m) of calcium to phosphorus present in these components falls within the following range: 0.50<m<1.00, at a temperature ranging from 180 to 350° C.

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