Coating composition
AssigneeSermatech International, Inc.
InventorsMark F. Mosser, Kevin B. Eddinger, William J. Fabiny
Life of this patent
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Abstract
A coating composition based upon an aqueous acid binder solution containing phosphate and chromate and/or molybdate ions into which has been dispersed a blend of metallic powder particles of three primary dimensions and flat metal flake materials, which can be applied to a substrate part to be coated more uniformly and thickly than conventional metal flake coatings, and which imparts better corrosion and impact resistance than conventional powder metal coatings.
Claims29
A phosphate coating composition of improved uniform coating thickness, impact resistance, bond strength and corrosion resistance, which coating comprises (a) an aqueous acid binder solution which comprises phosphate ions and ions selected from the group consisting of chromate and molybdate ions and (b) a mixture which contains powder of spherical particles, and flakes in a random distribution amongst the particles, wherein said flakes constitute at least about one percent by weight of the mixture, with the proviso that neither the powder nor the flake is zinc or magnesium and that the phosphate ions are present in major proportion and in excess of the ions selected from the group consisting of chromate and molybdate.
Dependencies are inferred from the claim text.