PROCESS FOR PRODUCING ZnAlMg-COATED METAL SHEET WITH OPTIMISED WIPING AND CORRESPONDING METAL SHEET Russian patent published in 2018 - IPC C23C2/06 C23C2/20 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to the manufacture of a sheet comprising a steel substrate at least one of the surfaces of which is coated with a metallic coating comprising Al, Mg and other components which consist of Zn, inevitable impurities, and, optionally, at least one additional element selected from Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Zr or Bi, wherein the content by weight of each of the additional elements in the metal coating is less than 0.3 %, the Al content by weight is 0.5 to 8 %, and the Mg content by weight is 0.3 to 3.3 %. Method includes steps of providing a steel substrate, applying a metal coating to at least one of its surfaces by immersing the substrate in a bath to produce said sheet, wiping the metal coating using at least one nozzle projecting through at least one outlet a wiping gas onto the metal coating, the sheet being run in front of the nozzle, the wiping gas being ejected from the nozzle along primary direction of ejection (E), a confinement box delimiting a confined zone at least downstream of the zone of impact of the wiping gas on the sheet, curing the metal coating.

EFFECT: method for manufacturing a sheet with a ZnAlMg coating with optimised wiping and the corresponding sheet.

16 cl, 5 dwg, 1 tbl