STEEL SHEET WITH ALUMINIUM COATING AND METHOD OF ITS MANUFACTURING Russian patent published in 2010 - IPC C23C2/12 B32B3/18 B32B15/00 

FIELD: metallurgy.

SUBSTANCE: invention elates to field of dip application into melt. Steel sheet with aluminium coat, applied by method of hot dip, contains steel sheet of basis and application layer, herewith coating layer contains striped interlayer, containing intermetallic compound chrome-aluminium in its section. Coating layer contains from 8 up to 15 wt % Si, from 0.26 up to 1.50 wt % Cr, from 0.50 up to 1.50 wt % Mg, and the rest is Al, in which intermetallic compound chrome-aluminium contains Cr₂Al₁₃ and Cr₂Al₈₄. Manufacturing method of steel sheet with aluminium coat includes submersion of steel sheet of basis into electrolytic tank, containing electrolytic tank composition, which contains from 8 up to 15 wt % Si, from 0.26 up to 1.50 wt % Cr, from 0.50 up to 1.50 wt % Mg and the rest is Al, and passing of steel sheet of the basis through electrolytic tank for formation of coating layer on steel sheet of the basis, herewith amount of coating material at one side of layer is from 15 up to 150 g/m².

EFFECT: invention provides receiving of steel sheet with aluminium coat, allowing excellent corrosion resistance, thermal stability and machinability.

7 cl, 7 dwg, 2 tbl