Method of applying a magnesium-containing powder to the surface of an aluminum or aluminum alloy substrate
AssigneeNDSU Research Foundation
InventorsMichael E. Nanna, Gordon P. Bierwagen, Dante Battocchi
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Abstract
Disclosed are methods of treating a metal to improve the metal's corrosion resistance. The method includes applying, to the surface of the metal, a coating which comprises magnesium powder and a binder. The present invention also relates to a coating composition that includes magnesium powder and a silane modified epoxy isocyanate hybrid polymer or prepolymer. The inventors have found that corrosion resistance (as determined by Prohesion™ exposure in accordance with ASTM D5894-96, which is hereby incorporated by reference) in excess of 3,000 hours on 2024 T-3 aluminum alloy can be achieved with the methods and coating compositions of the present invention.
Claims30
A method of treating an aluminum or an aluminum alloy metal to improve the metal's corrosion resistance, said method comprising:
- applying, to the surface of the metal, a coating which consists essentially of magnesium powder and a binder,
- wherein the binder is a polymeric binder comprising a polyisocyanate prepolymer and an epoxy prepolymer and wherein said method further comprises contacting the polymeric binder with a crosslinker.
Dependencies are inferred from the claim text.