Anti-corrosion pigment and use thereof
AssigneeChemische Fabrik Budenheim KG
InventorsKarl Gotzmann, Karlheinz Dorn, Hans-Dieter Nagerl, Sieghard Gobelbecker
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Abstract
An active heavy metal-free and non-toxic anti-corrosion pigment based on phosphate, which is particularly environmentally friendly, is a mixture of .beta.-tricalcium phosphate and tertiary magnesium phosphate or dicalcium phosphate dihydrate. It has good compatibility with the usual raw materials of paints and additives.
Claims17
Anti-corrosion pigment for surface protection of metals or metal alloys, with phosphate, wherein the anti-corrosion pigment comprises a mixture of .beta.-tricalcium phosphate with a second phosphate selected from the group consisting of tertiary magnesium phosphate and dicalcium phosphate dihydrate, said pigment having better anti-corrosion properties than pigments which contain only .beta.-tricalcium phosphate tertiary magnesium phosphate or dicalcium phosphate dihydrate.
Anti-corrosion pigment for surface protection of metals or metal alloys, with phosphate wherein the anti-corrosion pigment comprises a mixture of from 25 to 75 weight percent .beta.-tricalcium phosphate with from 75 to 25 weight percent of a second phosphate selected from the group consisting of tertiary magnesium phosphate and dicalcium phosphate dihydrate, said pigment having better anti-corrosion properties than pigments which contain only .beta.-tricalcium phosphate, tertiary magnesium phosphate or dicalcium phosphate dihydrate alone.
Anti-corrosion pigment for surface protection of metals or metal alloys, with phosphate, wherein the anti-corrosion pigment is a synergistic mixture of from 25 to 75 weight percent .beta.-tricalcium phosphate with from 75 to 25 weight percent of a second phosphate selected from the group consisting of tertiary magnesium phosphate and dicalcium phosphate dihydrate.
Dependencies are inferred from the claim text.