Active anti-corrosion pigments based on calcium oxide, aluminium oxide and iron oxide
An anti-corrosion pigment comprising about 30.0 to 2.0 mole % of CaO and about 70.0 to 98.0 mole % of Me2O3, wherein Me2O3 is (1-x) Al2O3 and x Fe2O3, x is from 0 to 1 and up to about 25 mole % of the Fe2O3 may be replaced by the corresponding quantity of Mn2O3, and having a specific surface area ac...
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Zusammenfassung: | An anti-corrosion pigment comprising about 30.0 to 2.0 mole % of CaO and about 70.0 to 98.0 mole % of Me2O3, wherein Me2O3 is (1-x) Al2O3 and x Fe2O3, x is from 0 to 1 and up to about 25 mole % of the Fe2O3 may be replaced by the corresponding quantity of Mn2O3, and having a specific surface area according to BET of about 0.1 to 200 m2/g and a percentage weight loss per gram of pigment, as determined by the Thompson corrosion test, of less than about 0.05% per gram of pigment is produced by calcining the corresponding metal oxides or materials which form the metal oxides on calcination at about 200 DEG to 1100 DEG C. The pigments are especially useful in making up anti-corrosion paints and lacquers. |
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