Thick coating compositions
AssigneeSermatech International, Inc.
InventorsMark F. Mosser, Bruce G. McMordie
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Abstract
Corrosion and oxidation resistant coating compositions containing phosphate, chromate or molybdate and atomized aluminum powder.
Claims19
A coating composition especially suitable for a machinable aluminum-filled thick coating possessing improved salt corrosion and oxidation resistance and bonding strength, which composition comprises a liquid binder which comprises phosphate ions and ions of the group of chromate or molybdate ions, and an atomized aluminum powder which has a particle size distribution curve possessing one maximum frequency in which the average particle size (as expressed in terms of the median equivalent spherical diameter (ESD)), is greater than at least 15 .mu.m, and at least about 5% by weight of the particles are greater than 44 microns in diameter while at least about 10% by weight are less than 20 microns in diameter.
A dry coating composition especially suitable for a machinable aluminum-filled thick coating possessing improved salt corrosion, oxidation resistance, and bonding strength, which composition comprises a spray dried binder which comprises phosphate and ions of the group consisting of chromate or molybdate ions and an atomized aluminum powder which has a particle size distribution curve possessing one maximum frequency in which the average particle size (as expressed in terms of the median equivalent spherical diameter (ESD)) is greater than at least 15 .mu.m, and at least about 5% of the particles by weight are greater than 44 microns while at least about 10% by weight are less than 20 microns in diameter.
Dependencies are inferred from the claim text.