Method of preventing corrosion of metals using silanes
AssigneeUniversity of Cincinnati
InventorsWim J. van Ooij, Vijay Subramanian, Chunbin Zhang
Life of this patent
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Abstract
A method of treating a metal substrate by applying a first coating treatment solution of 0.1% by volume of at least one silane, wherein the silane consists only of a multi-functional silane having at least two trisubstituted silyl groups, wherein the substituents are individually chosen from the group consisting of alkoxy and acetoxy, and wherein the multi-functional silane has been at least partially hydrolyzed and wherein the first coating treatment solution has a pH of less than about 7.
Claims42
A method of treating a metal substrate, comprising the steps of:
- (a) providing a metal substrate;
- (b) applying a coating of a first treatment solution directly onto the surface of said metal, said first treatment solution comprising at least about 0.1% by volume of at least one silane, wherein the silane consists only of multi-functional silane having at least two trisubstituted silyl groups wherein the substituents are individually chosen from the group consisting of alkoxy and acetoxy, wherein said multi-functional silane has been at least partially hydrolyzed, and wherein said first treatment solution has a pH of less than about 7.
A method of pretreating cold-rolled steel, comprising the steps of:
- (a) providing a first treatment solution consisting essentially of at least one multi-functional silane which has been at least partially hydrolyzed, wherein said multi-functional silane has at least two trialkoxysilyl groups;
- (b) providing a second treatment solution comprising at least one organofunctional silane which has been at least partially hydrolyzed;
- (c) applying a coating of said first treatment solution directly onto the surface of the steel;
- and
- (d) thereafter applying a coating of said second treatment solution onto said steel.
A treatment solution composition comprising at least about 0.1% by volume of at least one silane, wherein the silane consists only of multi-functional silane having at least two trisubstituted silyl groups wherein the substituents are individually chosen from the group consisting of alkoxy and acetoxy, in an aqueous alcohol solution, wherein the concentration range of alcohol to water is in the ratio of about 1:99 to about 99:1, and wherein the total concentration of multi-functional silanes in said treatment solution is between about 2% and about 5% by volume, based upon the total volume of said treatment solution components.
A method of treating a metal substrate, comprising the steps of:
- (a) providing a metal substrate;
- (b) applying at least one coating of a first treatment solution onto the surface of said metal to afford a coated metal surface, said first treatment solution comprising at least about 0.1% by volume of at least one silane, wherein the silane consists only of multi-functional silane having at least two trisubstituted silyl groups wherein the substituents are individually chosen from the group consisting of alkoxy and acetoxy, wherein said multi-functional silane has been at least partially hydrolyzed, and wherein said first treatment solution has a pH of less than about 7;
- and
- (c) applying a polymer coating onto the coated metal surface.
Dependencies are inferred from the claim text.