Composition and process for inhibiting corrosion of metallic substrates
OwnerGerald Wojcikinventor
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Abstract
A composition and process for inhibiting the corrosion of metallic substrates is revealed. The process utilizes an aqueous treatment solution comprising chitosan which has been reacted with an additive selected from the group consisting of phosphorus-containing compounds and sulfur-containing compounds and mixtures thereof. More preferably, the phosphorus-containing compound is a phosphonic acid and the sulfur-containing compound is a mercapto, thio, or thienyl containing compound or a mercapto functional silane. The composition and process are particularly useful in providing corrosion protection for aluminum and aluminum alloys.
Claims30
A composition useful in providing corrosion protection for metal surfaces which composition comprises chitosan, which has been reacted with an additive selected from the group consisting of phosphorus-containing compounds and sulfur-containing compounds and mixtures of the foregoing.
A process for providing corrosion protection to metal surfaces, which process comprises contacting the metal surfaces with an aqueous composition comprising chitosan which has been reacted with an additive selected from the group consisting of phosphorus-containing compounds and sulfur-containing compounds and mixtures of the foregoing.
Dependencies are inferred from the claim text.