公开(公告)号：US20200040438A1

公开(公告)日：2020-02-06

申请号：US16653183

申请日：2019-10-15

Applicant: ArcelorMittal

Inventor： Lydia RACHIELE ,  Herve DERULE ,  Delphine THAI

IPC: C23C2/06 ,  C23C2/26 ,  C23C22/05 ,  C23F11/14 ,  C25D3/22 ,  C25D5/48

Abstract: A coated metal sheet is provided. The coated metal sheet includes a steel substrate, a metal coating on at least one face of the steel substrate, the metal coating comprising at least 40% by weight of zinc; and a layer coating an outer surface of the metal coating, the layer including an amino acid in a neutral or salt form, the amino acid being selected from among alanine, arginine, aspartic acid, cysteine, glutamine, lysine, methionine, proline, serine, threonine, or of a mixture thereof, the amount of said amino acid or of said mixture being from 0.1 to 200 mg/m2, and optionally a base or a mixture of bases, or an acid or a mixture of acids.

公开(公告)号：US20200299844A1

公开(公告)日：2020-09-24

申请号：US16649246

申请日：2018-09-14

Applicant: ArcelorMittal

Inventor： Lydia RACHIELE ,  Frida GILBERT ,  Herve DERULE

IPC: C23C28/00 ,  C23C2/06 ,  C23C2/40 ,  C23C22/53 ,  C23C22/68 ,  C23C22/82

Abstract: A steel substrate is provided, coated on at least one of its faces with a metallic coating based on zinc or its alloys wherein the metallic coating is itself coated with a zincsulphate-based layer including at least one of the compounds selected from among zincsulphate monohydrate, zincsulphate tetrahydrate and zincsulphate heptahydrate, wherein the zincsulphate-based layer has neither zinc hydroxysulphate nor free water molecules nor free hydroxyl groups, the surface density of sulphur in the zincsulphate-based layer being greater than or equal to 0.5 mg/m2. A corresponding treatment method is also provided.

公开(公告)号：US20180023177A1

公开(公告)日：2018-01-25

申请号：US15546262

申请日：2016-02-01

Applicant: ARCELORMITTAL

Inventor： Lydia RACHIELE ,  Herve DERULE ,  Delphine THAÏ

IPC: C23C2/06 ,  C25D5/48 ,  C23F11/14 ,  C25D3/22 ,  C23C2/26 ,  C23C22/05

Abstract: The invention relates to a method for preparing a metal sheet (1) comprising at least the steps of: providing a steel substrate (3) having two faces (5), for which at least one is coated with a metal coating (7) comprising at least 40% by weight of zinc, applying on the outer surface (15) of the metal coating (7) an aqueous solution comprising an amino acid, and the metal sheet which may be obtained.