Environmentally friendly coating compositions, bonding solution, and coated parts
AssigneeSermatech International, Inc.
InventorsMark F. Mosser, Kevin B. Eddinger
Life of this patent
Estimating the term…
Abstract
An aqueous phosphoric bonding solution and coating composition slurry which are environmentally friendly in that they are generally free of molybdate or chromium. Yet the solution is stable with respect to inorganic metal particles, especially aluminum which are admixed to the bonding solution for the preparation of the coating slurry. The metal coated parts and the method of coating the parts with the coating composition are also described. The parts have very satisfactory properties.
Claims16
An aqueous phosphoric acid bonding solution which comprises a source of magnesium, zinc and borate ions in aqueous phosphoric acid, the solution being at least substantially free of dissolved aluminum ions, chromate and molybdate and vanadium ions, and the solution having a pH in the range from about 2 to about 4.5.
A coating compensation comprising
- (a) an aqueous phosphoric acid bonding solution which comprises a source of magnesium, zinc and borate ions in aqueous phosphoric acid, the solution being at least substantially free of dissolved aluminum ions, chromate and molybdate and vanadium ions, and the solution having a pH in the range from about 2 to about 4.5, and (b) aluminum powder.
A metal coated with a cured coating composition comprising
- (a) an aqueous phosphoric acid bonding solution which comprises a source of magnesium, zinc and borate ions in aqueous phosphoric acid, the solution being at least substantially free of dissolved aluminum ions, chromate and molybdate and vanadium ions, and the solution having a pH in the range from about 2 to about 4.5, and (b) aluminum powder.
Dependencies are inferred from the claim text.