Back to results
US 8,785,000 B2Granted
Steel sheet with hot dip galvanized zinc alloy coating and process to produce it
AssigneeTata Steel Ijmuiden B.V.
InventorsTheodorus Franciscus Jozef Maalman, Robert Bleeker, Margot Julia Vlot
Life of this patent
Estimating the term…
Abstract
Steel strip provided with a hot dip galvanized zinc alloy coating layer, in which the coating of the steel strip is carried out in a bath of molten zinc alloy, the zinc alloy in the coating consisting of: 0.3-2.3 weight % magnesium; 0.6-2.3 weight % aluminum; optional <0.2 weight % of one or more additional elements; unavoidable impurities; the remainder being zinc in which the zinc alloy coating layer has a thickness of 3-12 μm.
Claims21
Steel strip provided with a hot dip galvanized zinc alloy coating layer, wherein the zinc alloy consists of:
- magnesium;
- aluminium;
- optional <0.2 weight % of one or more additional elements selected from the group consisting of Pb, Sb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni, Zr and Bi;
- unavoidable impurities;
- the remainder being zinc;
- wherein the magnesium and aluminum content in the zinc alloy layer is selected from a member of the group consisting of:
- 1.6-1.9 weight % aluminium and 1.4-1.7 weight % magnesium;
- wherein the zinc alloy coating layer has a thickness of 3-10 μm,
- wherein silicon content in the zinc alloy layer is below 0.0010 weight %.
6 more elements
Dependencies are inferred from the claim text.