发明申请
- 专利标题： Highly corrosion-resistant surface-treated steel sheet and method for producing same
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申请号： US10559641申请日： 2004-06-14
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公开(公告)号： US20060141230A1公开(公告)日： 2006-06-29
- 发明人: Tatsuya Miyoshi , Kenichi Sasaki , Naoto Yoshimi , Akira Matsuzaki , Kazuhisa Okai , Takao Ooshima , Takashi Nakano , Masahiro Murata , Syoichi Tanaka
- 申请人： Tatsuya Miyoshi , Kenichi Sasaki , Naoto Yoshimi , Akira Matsuzaki , Kazuhisa Okai , Takao Ooshima , Takashi Nakano , Masahiro Murata , Syoichi Tanaka
- 申请人地址： JP Tokyo 100-0011
- 专利权人： JFE Steel Corporation
- 当前专利权人： JFE Steel Corporation
- 当前专利权人地址： JP Tokyo 100-0011
- 优先权： JP2003-171344 20030616; JP2004-146334 20040517
- 国际申请： PCT/JP04/08650 WO 20040614
- 主分类号： B32B15/092
- IPC分类号： B32B15/092 ; B32B15/18
摘要：
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.