Patent ID: 8404357

Claim:
A steel sheet for a can or a container comprising: a tin layer or iron-tin alloy layer on the steel sheet, wherein the tin layer or iron-tin alloy layer comprises Sn in an amount in the range of 2.8 g/m 2 to 12 g/m 2 ; an optional tin oxide layer of a thickness measured by an electric stripping method of 0 mC/cm 2 to 3.5 mC/cm 2 on the tin layer or iron-tin alloy layer; and a chrome-free foundation layer on the tin oxide layer if present or on the tin layer or iron-tin alloy layer if the tin oxide layer is not present including zirconium oxide, zirconium hydroxide, or a composite thereof in an amount converted to zirconium in the range of 1 mg/m 2 to 30 mg/m 2 , wherein the chrome-free foundation layer optionally includes an amount of sulfate radical (SO 4 2− ) in the range of 0 mg/m 2 to 7 mg/m 2 .