Alloy and process for galvanizing steel
AssigneeN.V. Union Minere S.A.
InventorMichael Gilles
Life of this patent
Estimating the term…
Abstract
This disclosure relates to an Sn-containing and/or Bi-containing zinc alloy for hot galvanizing steel, more particularly for component galvanizing. The alloy is composed of 1 to 5% by weight of Sn+Bi, 0 to saturation of Pb, 0.025 to 0.200% by weight of at least one of Ni, Cr or Mn, 0 to 0.030% by weight of at least one of Al, Ca and Mg, the remainder being zinc and unavoidable impurities.
Claims5
A bath for hot-dip galvanizing consisting of an Sn- and Bi-containing zinc alloy, consisting of 1 to 5% by weight of Sn plus Bi, 0 to saturation of Pb, 0.025 to 0.200% by weight of at least one of Ni, Cr or Mn, 0 to 0.030% by weight of at least one of Al, Ca and Mg, the remainder being zinc and unavoidable impurities.
A process for component galvanizing of steel products which may contain Si and/or P, comprising the steps of:
- providing a molten bath of an Sn- and Bi-containing zinc alloy consisting of 1 to 5% by weight of Sn plus Bi, 0 to saturation of Pb, 0.025 to 0.200% by weight of at least one of Ni, Cr or Mn, 0 to 0.030% by weight of at least one of Al, Ca and Mg, the remainder being zinc and unavoidable impurities;
- and
- dipping a steel product in said molten bath to galvanize said product.
Dependencies are inferred from the claim text.