STEEL FLAT PRODUCT HAVING A METALLIC COATING WHICH PROTECTS AGAINST CORROSION AND METHOD FOR PRODUCING A METALLIC ZN-MG COATING, WHICH PROTECTS AGAINST CORROSION, ON A STEEL FLAT PRODUCT

摘要

A steel flat product having a Zn—Mg—Al coating. The coating, which in addition to zinc and unavoidable impurities, comprises in wt. %: Mg: 4-8%, Al: 0.5-1.8% and optionally one or more of the following: Si: 2%, Pb: 0.1%, Ti: 0.2%, Ni: 1%, Cu: 1%, Co: 0.3%, Mn: 0.5%, Cr: 0.2%, Sr: 0.5%, Fe: 3%, B: 0.1%, Bi: 0.1%, Cd: 0.1%, REM0.2%, and Sn0.5%. The steel flat product according to the invention is not only outstandingly protected against corrosion, but also welds well and coats well with an organic layer applied subsequently. The invention also relates to a method for producing a steel flat product having a Zn—Mg—Al coating.