| 摘要 |
The invention relates mainly to a metal sheet comprising a steel substrate coated on at least one of its faces with a coating comprising 0.1 to 20 wt.-% magnesium, optionally 0.1 to 20 wt.-% aluminium, the remainder being zinc, possible impurities linked to the method and optionally one or more additional elements selected from Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni, Zr and Bi, the weight concentration of each additional element being less than 0.3 %, the coating itself being covered with a layer comprising zinc hydroxychloride having a chlorine layer weight of at least 1 mg/m2, in which the layer does not comprise: hydrozincite or mixed hydroxycarbonates of zinc and aluminium. The invention also relates to the method for producing the metal sheet of the invention. |
