Anti-corrosive white pigments and method for producing the same
AssigneeMetallgesellschaft Aktiengesellschaft
InventorsThomas Rentschler, Fritz Muller, Jochen Winkler, Wolf-Rudiger Karl, Kirsten Fohr
Life of this patent
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Abstract
Anticorrosive white pigments useful for inhibiting corrosion include surface-coated TiO2 base bodies, preferably in the rutile modification, having Mn3(PO4)2 and one or more of the substances chosen from aluminum oxides, aluminum hydroxides, aluminum phosphates, aluminum hydrogen phosphates, aluminum dihydrogen phosphates and aluminum polyphosphates are precipitated on to the TiO2 base bodies. Mn3(PO4)2 may be replaced completely or partially by Zn3(PO4)2. Phosphates and/or oxides of cerium may be additionally deposited singly, or several of them may be deposited, on to the TiO2 base bodies.
Claims17
A method for inhibiting corrosion, comprising:
- providing anticorrosive white pigments comprising surface coated TiO2 base bodies, and at least one phosphate selected from the group consisting of Mn3(PO4)2 and Zn3(PO4)2 and at least one aluminum compound selected from the group consisting of aluminum oxides and aluminum hydroxides precipitated on the TiO2 base bodies;
- and
- applying the anticorrosive white pigments to a metal base.
Dependencies are inferred from the claim text.