公开(公告)号：US20190169754A1

公开(公告)日：2019-06-06

申请号：US16207888

申请日：2018-12-03

Applicant: ArcelorMittal

Inventor： Tiago Machado Amorim ,  Joelle Richard ,  Eric Jacqueson ,  Audrey Lhermeroult ,  Pascale Feltin ,  Jean-Michel Lemaire ,  Luc Diez ,  Jean-Michel Mataigne

IPC: C23C28/00 ,  C23C2/06 ,  C23C2/26 ,  C23C22/53 ,  C23C22/82

Abstract: A metal sheet is provided. The metal sheet includes a substrate having two faces, each face hot dip coated with a metal coating of zinc, aluminum and magnesium. The metal coatings include between 0.1 and 20 wt % of aluminum and 0.1 and 10 wt % of magnesium. Layers of magnesium oxide or magnesium hydroxide are formed on outer surfaces of the metal coatings. The layers are altered by applying an acid solution on the outer surfaces of the metal coatings or by applying mechanical forces using a roller leveler, a brushing device, or a shot-blasting device on the outer surfaces of the metal coatings. The metal sheet also includes a layer of oil deposited directly on the outer surfaces of the metal coatings.