ALUMINUM PLATED STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE WITH RESPECT TO ALCOHOL OR MIXED GASOLINE OF SAME AND APPEARANCE AND METHOD OF PRODUCTION OF SAME

摘要

The present invention relates to aluminum plated steel sheet which does not require coating after plating and is high in production flexibility enabling application of conventional production processes as they are or exhibits excellent corrosion resistance to flex fuels and further is excellent in appearance and to fuel tanks characterized by being produced using the steel sheet.;The means for solving this is characterized by defining the Si, Mg, Ca, and Ti ingredients in the aluminum plating layer and controlling the cooling method after hot dip aluminum coating so as to make Mg2Si particles with a long axis of 10 μm or less and an aspect ratio of 1 to 3 finely disperse in the plating layer. Due to the Mg2Si particles, it is possible to give an excellent corrosion resistance to flex fuels and suppress the deterioration in appearance due to MgO.

主权项

1. Aluminum plated steel sheet which is excellent in corrosion resistance and appearance which is comprised of steel sheet on at least one surface of which there is a plating layer comprised of, by mass %,
Si: 2% to 11%, Mg: 3% to 9%, Ca: 0.1% to 5%, Ti: 0.005% to 0.05%, and a balance of Al and unavoidable impurities, said plating layer containing Mg2Si particles with a long axis of 10 μm or less and a ratio of a long axis and a short axis, that is, an aspect ratio, of 1 to 3.