Coating compositions exhibiting corrosion resistance properties, related coated substrates, and methods
AssigneePPG Industries Ohio, Inc.
InventorsEdward R. Millero, John R. Schneider, Cheng-Hung Hung, Noel R. Vanier
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Abstract
Coating compositions are disclosed that include corrosion resisting particles such that the coating composition can exhibit corrosion resistance properties. Also disclosed are substrates at least partially coated with a coating deposited from such a composition and multi-component composite coatings, wherein at least one coating later is deposited from such a coating composition. Methods and apparatus for making ultrafine solid particles are also disclosed.
Claims18
A method for enhancing the corrosion resistance of a substrate comprising an aluminum alloy, the method comprising coating at least a portion of the substrate with a composition comprising:
- (a) a film-forming resin;
- (b) particles comprising magnesium oxide, wherein the particles have a surface area of at least 10 square meters per gram and an average primary particle size of no more than 200 nanometers;
- and
- (c) an alkoxy-monosilane.
A method for coating a metal substrate comprising an aluminum alloy, the method comprising depositing a coating directly to at least a portion of the metal substrate, the coating being deposited from a composition comprising:
- (a) a film-forming resin;
- (b) particles comprising magnesium oxide, wherein the particles have a surface area of at least 10 square meters per gram and an average primary particle size of no more than 200 nanometers;
- and
- (c) an alkoxy-monosilane compound;
- wherein the aluminum alloy comprises
- (i) 90.7 to 94.7 weight percent aluminum;
- (ii) 3.8 to 4.9 weight percent copper;
- (iii) 1.2 to 1.8 weight percent magnesium;
- and
- (iv) 0.3 to 0.9 weight percent manganese.
A method for coating an aluminum alloy substrate, the method comprising depositing a coating directly to at least a portion of the aluminum alloy substrate, the coating being deposited from a composition comprising:
- (a) a film-forming resin;
- (b) particles comprising magnesium oxide, wherein the particles have a surface area of at least 10 square meters per gram and an average particle size of no more than 200 nanometers;
- and
- (c) an alkoxy-monosilane compound;
- wherein the composition is free of phosphoric acid.
A substrate comprising an aluminum alloy, wherein the substrate is at least partially coated with a primer coating comprising:
- (a) a film-forming resin;
- (b) particles comprising magnesium oxide, wherein the particles have a surface area of at least 10 square meters per gram and an average primary particle size of no more than 200 nanometers;
- and
- (c) an alkoxy-monosilane compound;
- wherein the particles and the alkoxy-monosilane are dispersed in the film-forming resin.
Dependencies are inferred from the claim text.