Method of treating metals using ureido silanes and multi-silyl-functional silanes in admixture
First Claim
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1. A method of treating a metal sheet, comprising the steps of:
- (a) providing a metal substrate, the said metal substrate chosen from the group consisting of;
cold-rolled steelsteel coated with a metal chosen from the group consisting of;
zinc, zinc alloy, aluminum and aluminum alloy;
iron;
aluminum; and
aluminum alloy; and
(b) applying a coating on the metal substrate by contacting the metal substrate with a solution containing one or more hydrolyzed or partially hydrolyzed ureido silanes, one or more hydrolyzed or partially hydrolyzed multi-silyl-functional silanes and a solvent, wherein the ratio of multi-silyl-functional silanes to ureido silanes in the solution is in the range of 1;
1-1;
10, andsubstantially removing the solvent.
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Abstract
The present invention relates to a method of metal treatment, particularly a method of metal treatment in order to improve corrosion resistance. The method comprises applying a solution containing one or more ureido silanes in admixture with one or more multi-silyl-functional; silanes to a metal substrate. The method is particularly suitable for use on cold-rolled steel, zinc, iron, aluminium and aluminium alloy surfaces.
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30 Claims
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1. A method of treating a metal sheet, comprising the steps of:
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(a) providing a metal substrate, the said metal substrate chosen from the group consisting of; cold-rolled steel steel coated with a metal chosen from the group consisting of;
zinc, zinc alloy, aluminum and aluminum alloy;iron; aluminum; and aluminum alloy; and (b) applying a coating on the metal substrate by contacting the metal substrate with a solution containing one or more hydrolyzed or partially hydrolyzed ureido silanes, one or more hydrolyzed or partially hydrolyzed multi-silyl-functional silanes and a solvent, wherein the ratio of multi-silyl-functional silanes to ureido silanes in the solution is in the range of 1;
1-1;
10, andsubstantially removing the solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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20. A method of permanently improving the corrosion resistance of a metal sheet, comprising the steps of:
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(a) providing a metal substrate, the said metal substrate chosen from the group consisting of; cold-rolled steel steel coated with a metal chosen from the group consisting of;
zinc, zinc alloy, aluminum and aluminum alloy;iron; aluminum; and aluminum alloy; and (b) applying a solution to the metal substrate containing one or more hydrolyzed or partially hydrolyzed ureido silanes, one or more hydrolyzed or partially hydrolyzed multi-silyl-functional silanes and a solvent wherein the ratio of multi-silyl-functional silanes to ureido silanes in the solution is in the range of 1;
1-1;
10.
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Specification