Invention Grant
- Patent Title: Surface-treated steel sheet with excellent corrosion resistance and method for manufacturing same
- Patent Title (中): 耐腐蚀性优异的表面处理钢板及其制造方法
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Application No.: US11977868Application Date: 2007-10-26
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Publication No.: US08012599B2Publication Date: 2011-09-06
- Inventor: Tatsuya Miyoshi , Kenichi Sasaki , Naoto Yoshimi , Akira Matsuzaki , Kazuhisa Okai , Takao Ooshima , Takashi Nakano , Masahiro Murata , Syoichi Tanaka
- Applicant: Tatsuya Miyoshi , Kenichi Sasaki , Naoto Yoshimi , Akira Matsuzaki , Kazuhisa Okai , Takao Ooshima , Takashi Nakano , Masahiro Murata , Syoichi Tanaka
- Applicant Address: JP Tokyo JP Hyogo
- Assignee: JFE Steel Corporation,Kansai Paint Co., Ltd.
- Current Assignee: JFE Steel Corporation,Kansai Paint Co., Ltd.
- Current Assignee Address: JP Tokyo JP Hyogo
- Agency: Holtz, Holtz, Goodman & Chick, PC
- Priority: JP2003-171344 20030616; JP2004-146334 20040517
- Main IPC: B32B15/04
- IPC: B32B15/04 ; B32B15/08 ; B32B15/092 ; B32B15/095 ; B32B15/18 ; B05D3/02
Abstract:
The surface-treated steel sheet has a zinc-based plated steel sheet, a surface-treatment coating being formed on the surface of the zinc-based steel sheet by applying and drying a surface treatment coating composition thereon, and a top coating being formed by applying and drying a coating composition for top coating on the surface-treatment coating. The surface treatment coating composition contains a water-epoxy resin dispersion, a silane coupling agent, and phosphoric acid and/or a hexafluorometal acid. The coating composition for top coating contains a high molecular weight epoxy group-containing resin having number average molecular weights ranging from 6000 to 20000.
Public/Granted literature
- US20080070018A1 Surface-treated steel sheet with excellent corrosion resistance and method for manufacturing same Public/Granted day:2008-03-20
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