ALUMINUM ALLOY PLATE WITH EXCELLENT FORMABILITY AND PRODUCTION THEREOF

摘要

An aluminum alloy plate with large elongation, small sliding resistance and surface pressure dependence thereof and excellent formability, characterized by having an iron-base metallic coating layer in a coating weight of 1 to 50 g/m<2> provided on the surface of an aluminum alloy substrate containing at least 4 wt % of Mg or on the surface of a bake hardening aluminum alloy substrate containing at least 0.4 wt % of Mg and Si in terms of Mg2Si. A desirable iron-base coating is an Fe-Zn alloy coating with a Zn content of preferably 20 to 80 wt %, still preferably 30 to 40 wt %. It is desirable to provide a zincate layer below the iron-base coating layer and a layer of an inorganic compound such as a hydrated alkali metal borate above the iron-base coating layer.