公开(公告)号：US20230102675A1

公开(公告)日：2023-03-30

申请号：US17795405

申请日：2021-02-01

Applicant: NIPPON STEEL CORPORATION

Inventor： Shintaro YAMANAKA ,  Hirokazu YOKOYA ,  Yasuhiko SATO ,  Hiroaki ANDO ,  Nobuo NAKASONE

IPC: C25D3/30 ,  C25D3/54 ,  C25D5/10

Abstract: To provide a Sn-based plated steel sheet capable of exhibiting superior corrosion resistance, yellowing resistance, coating film adhesiveness, and sulphide stain resistance without using a chromate film. A Sn-based plated steel sheet of the present invention includes: a steel sheet; a Sn-based plating layer located on at least one surface of the steel sheet; and a coating layer located on the Sn-based plating layer, wherein the Sn-based plating layer contains 1.0 g/m2 to 15.0 g/m2 of Sn per side in terms of metal Sn, the coating layer contains zirconium oxide, and a content of the zirconium oxide is 1.0 mg/m2 to 10.0 mg/m2 per side in terms of metal Zr, the zirconium oxide includes zirconium oxide with an amorphous structure, and a crystalline layer whose main component is zirconium oxide with a crystalline structure is present on an upper layer of the zirconium oxide with the amorphous structure.

公开(公告)号：US20200002818A1

公开(公告)日：2020-01-02

申请号：US16485703

申请日：2018-03-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinichi YAMAGUCHI ,  Shintaro YAMANAKA

IPC: C23C28/00 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C23C2/12

Abstract: An Al-plated steel sheet includes: a base; an Al-plating layer formed on at least one of opposite surfaces of the base; and a surface layer formed on the Al-plating layer, the surface layer containing: ZnO particles; an organic resin; and acetylacetonato in an amount in a range from 10 mass % to 30 mass %, both inclusive, with respect to a total mass of the surface layer. A mean particle size of the ZnO particles is in a range from 0.10 μm to 5.00 μm, both inclusive, and an amount of coating of the ZnO particles is in a range from 0.5 g/m2 to 10.0 g/m2, both inclusive, in terms of metal Zn.

公开(公告)号：US20220389590A1

公开(公告)日：2022-12-08

申请号：US17772079

申请日：2019-12-19

Applicant: NIPPON STEEL CORPORATION

Inventor： Shintaro YAMANAKA ,  Shigeru HIRANO

IPC: C23C28/00 ,  C25D3/32 ,  C25D5/50 ,  C25D9/08

Abstract: To provide a Sn-based plated steel sheet excellent in yellowing resistance, coating film adhesiveness, and sulfurization blackening resistance without performing the conventional chromate treatment.
A Sn-based plated steel sheet of the present invention includes: a steel sheet; a Sn-based plating layer located on at least one surface of the steel sheet; and a coating layer located on the Sn-based plating layer, wherein: the Sn-based plating layer contains 0.10 to 15.00 g/m2 of Sn per side in terms of metal Sn; the coating layer contains a Zr oxide and a Mn oxide; a content of the Zr oxide is 0.20 to 50.00 mg/m2 per side in terms of metal Zr; a content of the Mn oxide in terms of metal Mn is 0.01 to 0.50 times on a mass basis relative to the content of the Zr oxide in terms of metal Zr; and a depth position A where an element concentration of Mn is maximum is located on a side closer to a surface of the coating layer than a depth position B where an element concentration of Zr is maximum, and a distance in a depth direction between the depth position A and the depth position B is 2 nm or more in an element analysis in the depth direction by XPS.

公开(公告)号：US20200232077A1

公开(公告)日：2020-07-23

申请号：US16487797

申请日：2018-03-23

Applicant: NIPPON STEEL CORPORATION

Inventor： Shinichi YAMAGUCHI ,  Jun MAKI ,  Soshi FUJITA ,  Shintaro YAMANAKA ,  Michiko KONNO ,  Tetsuya TOBA

IPC: C22C38/50 ,  C22C38/44 ,  C22C38/42 ,  C22C38/04 ,  C23C2/12 ,  C23C2/26 ,  C23C28/00

Abstract: A sheet includes: a base; an Al-plating layer on at least one of opposite surfaces of the base; an intermediate coating layer on a surface of the Al-plating layer; and a surface coating layer formed on a surface of the intermediate coating layer and containing ZnO particles with a mean particle size of 0.10 μm or more and 5.00 μm or less and an organic resin such that an amount of coating of the ZnO particles is 0.5 g/m2 or more and 10.0 g/m2 or less in terms of metallic zinc.

公开(公告)号：US20200040479A1

公开(公告)日：2020-02-06

申请号：US16603496

申请日：2018-04-13

Applicant: NIPPON STEEL CORPORATION

Inventor： Shintaro YAMANAKA ,  Shigeru HIRANO ,  Masakazu NODA ,  Yasuhiko SATO

IPC: C25D11/26 ,  B32B15/04 ,  B32B15/18 ,  C25D5/36 ,  C25D11/34 ,  C25D9/10 ,  C23C2/08 ,  C23C28/00

Abstract: A Sn-plated steel sheet according to the present invention includes a steel sheet, a Sn-plated layer that is provided on at least one surface of the steel sheet, and a film that is provided on a surface of the Sn-plated layer and includes zirconium oxide and tin oxide, in which an amount of the zirconium oxide in the film is 0.2 mg/m2 to 50 mg/m2 in terms of metal Zr amount, in a depth direction analysis by X-ray photoelectron spectroscopy, a depth position A at which an element concentration of Zr present as the zirconium oxide is maximum is positioned closer to a surface of the film than a depth position B at which an element concentration of Sn present as the tin oxide is maximum, and a distance between the depth position A and the depth position B in a depth direction is 0.5 nm or more.