Patent ID: 7575647

Claim:
A method of forming a corrosion-resistant metal strip for use in the at least partial formation of a petroleum receptacle comprising: a) providing a metal strip having a top and bottom surface; b) coating the top and bottom surface of said metal strip with a corrosion-resistant tin-zinc alloy by a hot dip process, said corrosion-resistant tin-zinc alloy forming a multi-phase alloy upon cooling which resists corrosion by petroleum products, said corrosion-resistant tin-zinc alloy comprising tin, zinc and metal additive, at least about 95 weight percent of said corrosion-resistant tin-zinc alloy comprised of tin and zinc, said zinc content of said corrosion-resistant tin-zinc alloy being up to about 30 weight percent, said metal additive including a metal selected from the group consisting of chromium, copper, lead, magnesium, manganese, molybdenum, nickel, silicon, titanium and mixtures thereof; c) forming a heat created intermetallic layer between said strip and said corrosion-resistant tin-zinc alloy and, d) controlling a coating thickness of said corrosion-resistant tin-zinc alloy on said top and bottom surface of said strip such that the average coating thickness on each surface of said strip is up to about 1270 microns.