| 摘要 |
An anticorrosion pigment suited for paints and lacquers and consisting of CaZn2(PO4)2 . 2H2O crystallizing in the Scholzite lattice and having a specific surface according to BET of from 0.1 to 50 m2/g is produced by a process wherein (A) (I) A SALT SOLUTION CONTAINING CALCIUM AND ZINC CATIONS IN A RATIO OF ABOUT 1:2 IS NORMALLY, INVERSELY OR SIMULTANEOUSLY PRECIPITATED IN AIR AT TEMPERATURES OF UP TO ABOUT 100 DEG C. with an equivalent or substantially equivalent quantity of a solution containing an alkali metal or ammonium phosphate ion; or (ii) compounds of calcium and zinc, which can be decomposed with relatively strong acids or neutralized with acids, in a ratio of about 1:2, have phosphoric acid or ammonium phosphate added to them in approximately the quantity which is required for decomposition or neutralization, or in a slight excess of that quantity, at temperatures of up to about 100 DEG C.
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