ANTICORROSIVE PIGMENTS Russian patent published in 2005 - IPC

FIELD: metal-protecting materials.

SUBSTANCE: invention relates to protection of metals against corrosion using paint and varnish coatings. Invention proposes using as anticorrosive pigments co-precipitated manganite-phosphates, manganite-silicates, manganite-sulfates of metals of the general formula: MMnO_xnMZ wherein M means Ca²⁺, Zn²⁺, Fe²⁺, Sr²⁺ at Z - PO₄ ^3-, SiO₃ ^2-, and M means Ba²⁺ at Z - SO₄ ^2-, PO₄ ^3-, SiO₃ ^2-; x = 2.5-3; n = 0.5-10 with the content of co-precipitated manganite of corresponding metal from 5 to 70 wt.-% as anticorrosive pigments. Proposed pigments by their anticorrosive properties exceed that of zinc tetraoxychromate. Invention provides applying low toxic anticorrosive pigment-inhibitors with protective properties comparable with that of chromate pigments.

EFFECT: expanded assortment of anticorrosive pigments.

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