公开(公告)号：US20240158901A1

公开(公告)日：2024-05-16

申请号：US18280909

申请日：2022-03-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Takashi FUJII ,  Hiroyasu FURUKAWA ,  Yuki YAMAMURA ,  Fumio SHIBAO ,  Kohei UEDA ,  Akira NAKAGAWA ,  Naoto SASAKI

IPC: C23C2/06 ,  C09D5/00 ,  C09D167/00 ,  C23C2/40

CPC classification number: C23C2/06 ,  C09D5/002 ,  C09D167/00 ,  C23C2/40

Abstract: To more securely inhibit the occurrence of paint film floating even when drawing is performed by using a Zn—Al—Mg-based alloy plated steel sheet as a base sheet.
A pre-coated plated steel sheet according to the present invention includes: a plating layer composed of Zn—Al—Mg-based alloy plating, the plating layer being positioned on one side or both sides of a steel sheet; a chemical treatment film layer positioned on the plating layer; and a paint film layer positioned on the chemical treatment film, in which the paint film layer includes a primer paint film layer, and an upper paint film layer positioned on the primer paint film layer, and at least any of the following is satisfied: both a condition (a-1) and a condition (a-2); a condition (b); and a condition (c).

公开(公告)号：US20240150585A1

公开(公告)日：2024-05-09

申请号：US18281933

申请日：2022-03-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Hiroyasu FURUKAWA ,  Takashi FUJII ,  Fumio SHIBAO ,  Kohei UEDA ,  Akira NAKAGAWA ,  Yuki YAMAMURA ,  Naoto SASAKI

IPC: C09D5/08 ,  B05D7/16 ,  C09D5/00 ,  C09D175/06

CPC classification number: C09D5/08 ,  B05D7/16 ,  C09D5/002 ,  C09D175/06 ,  C23C2/06

Abstract: To further improve, even under OT bending with the use of a Zn—Al—Mg-based alloy plated steel sheet as a base sheet, corrosion resistance regarding corrosion under paint film at a OT bent portion and a periphery thereof, without causing occurrence of cracks and peeling in the paint film.
A pre-coated plated steel sheet according to the present invention includes: a plating layer composed of Zn—Al—Mg-based alloy plating, the plating layer being positioned on one side or both sides of a steel sheet; a chemical treatment film layer positioned on the plating layer; and a paint film layer positioned on the chemical treatment film, in which the paint film layer includes a primer paint film layer, and an upper paint film layer positioned on the primer paint film layer, and at least any of the following is satisfied: both a condition (a-1) and a condition (a-2); a condition (b); and a condition (c).