Composition and method for inhibiting corrosion of aluminum and aluminum alloys using mercapto substituted silanes
OwnerDavid Crotty, Justin Girard +1inventors
InventorsDavid Crotty, Justin Girard, Tarek Nahlawi
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Abstract
Corrosion of metal surfaces, particularly aluminum or aluminum alloy surfaces, is inhibited by contacting the metal surfaces with a solution comprising a mercapto-substituted silane and then preferably baking the metal to cure the silane coating. Multifunctional organo-mercapto-substituted silanes are preferred in the practice of the process. Preferably, the treatment solution is an aqueous mixture of the mercapto-substituted silane and selected solvents.
Claims30
A method of treating a metal to improve corrosion resistance, comprising contacting the metal with a treatment solution, which treatment solution comprises a mercapto-substituted silane.
A composition useful in improving the corrosion resistance of a metal, said composition comprising:
- a) from 0.5 to 10 weight percent of a mercapto-substituted silane;
- b) a solvent effective to solubilize the mercapto-substituted silane in aqueous solution;
- c) water.
- wherein the pH of the composition is less than 7.
Dependencies are inferred from the claim text.