-
Patent Agency Ranking
公开(公告)号：US11795526B2
公开(公告)日：2023-10-24
申请号：US17312626
申请日：2019-11-13
Applicant: JFE Steel Corporation
Inventor： Masahiro Yoshida , Takeshi Matsuda , Kazuhisa Okai , Yusuke Fushiwaki , Akira Matsuzaki , Daisuke Mizuno
Abstract: A surface-treated steel sheet includes a chemical conversion coating with a thickness of 3.0 μm or less, the chemical conversion coating being placed on a surface of a hot-dip Zn—Al alloy coated steel sheet including a hot-dip Zn—Al alloy coating film containing Al: more than 1.0 mass % and 15 mass % or less, a balance being Zn and inevitable impurities. The chemical conversion coating contains AlH2P3O10.2H2O and a compound containing one or more elements selected from Mg, Ca, and Sr such that a sum of contents of AlH2P3O10.2H2O and the compound is 3.0 mass % to 50 mass %.
-
公开(公告)号：US20220112579A1
公开(公告)日：2022-04-14
申请号：US17312626
申请日：2019-11-13
Applicant: JFE Steel Corporation
Inventor： Masahiro Yoshida , Takeshi Matsuda , Kazuhisa Okai , Yusuke Fushiwaki , Akira Matsuzaki , Daisuke Mizuno
Abstract: A surface-treated steel sheet includes a chemical conversion coating with a thickness of 3.0 μm or less, the chemical conversion coating being placed on a surface of a hot-dip Zn—Al alloy coated steel sheet including a hot-dip Zn—Al alloy coating film containing Al: more than 1.0 mass % and 15 mass % or less, a balance being Zn and inevitable impurities. The chemical conversion coating contains AlH2P3O10.2H2O and a compound containing one or more elements selected from Mg, Ca, and Sr such that a sum of contents of AlH2P3O10.2H2O and the compound is 3.0 mass % to 50 mass %.
-
公开(公告)号：US11174556B2
公开(公告)日：2021-11-16
申请号：US16340134
申请日：2017-10-06
Applicant: JFE STEEL CORPORATION
Inventor： Reona Endo , Kazuhisa Okai , Hiroshi Kajiyama , Takashi Kawano
Abstract: Disclosed is a surface-treatment solution for producing a zinc or zinc alloy coated steel sheet with a surface-coating layer that does not contain a chromium compound in the surface-coating layer and that is excellent in all of heat discoloration resistance, heat cracking resistance, planar part anti-corrosion property, corrosion resistance after alkali degreasing, blackening resistance, stack blackening resistance, anti-water stain property, solvent resistance, perspiration resistance, coating adhesion property, and storage stability. The disclosed surface-treatment solution contains a glycidyl group-containing silane coupling agent (A), a tetraalkoxysilane (B), a zirconium carbonate compound (C), and an anionic polyurethane resin (D) having a glass transition temperature (Tg) of 80° C. to 130° C., a vanadium compound (E), a molybdic acid compound (F), and water, the surface-treatment solution having a pH of 8.0 to 10.0, and the amount of each component satisfying a predetermined relationship.
-
公开(公告)号：US11618938B2
公开(公告)日：2023-04-04
申请号：US16627456
申请日：2018-06-06
Applicant: JFE Steel Corporation
Inventor： Hiroki Harada , Kazuhisa Okai , Hiroshi Kajiyama
IPC: C23C16/00 , C23C2/06 , C22C18/04 , C23C2/28 , C23C2/40 , C23C22/78 , C23C28/00 , C23C2/26 , C23C22/42 , C23C2/14
Abstract: A steel sheet has a hot-dip Zn—Al—Mg-based coating film, the coating film containing 1 mass % to 22 mass % of Al and 0.1 mass % to 10 mass % of Mg on a surface of the steel sheet, in which an X-ray diffraction peak intensity ratio of a Mg—Zn compound phase in the coating film, that is, MgZn2/Mg2Zn11, is 0.2 or less.
-
公开(公告)号：US20210147971A1
公开(公告)日：2021-05-20
申请号：US16627456
申请日：2018-06-06
Applicant: JFE Steel Corporation
Inventor： Hiroki Harada , Kazuhisa Okai , Hiroshi Kajiyama
Abstract: A steel sheet has a hot-dip Zn—Al—Mg-based coating film, the coating film containing 1 mass % to 22 mass % of Al and 0.1 mass % to 10 mass % of Mg on a surface of the steel sheet, in which an X-ray diffraction peak intensity ratio of a Mg—Zn compound phase in the coating film, that is, MgZn2/Mg2Zn11, is 0.2 or less.
-
-
-
-
Search Results
5
records
(took 0.011 seconds)
