发明申请
- 专利标题： Surface-treated steel sheet with excellent corrosion resistance and method for manufacturing same
- 专利标题（中）： 耐腐蚀性优异的表面处理钢板及其制造方法
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申请号： US11977868申请日： 2007-10-26
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公开(公告)号： US20080070018A1公开(公告)日： 2008-03-20
- 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 JP Hyogo
- 专利权人： JFE STEEL CORPORATION,KANSAI PAINT CO., LTD.
- 当前专利权人： JFE STEEL CORPORATION,KANSAI PAINT CO., LTD.
- 当前专利权人地址： JP Tokyo JP Hyogo
- 优先权： JP2003-171344 20030616; JP2004-146334 20040517
- 主分类号： B32B7/02
- IPC分类号： B32B7/02 ; B05D3/02
摘要：
A surface-treated steel sheet has a zinc-based or an aluminum-based plated steel sheet, a surface-treatment coating being formed on the surface of the zinc-based or aluminum-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 water dispersed polyurethane resin, a silane coupling agent, and phosphoric acid and/or a hexafluorometal acid. The coating composition for a top coating contains a high molecular weight epoxy group-containing resin average molecular weight of 6,000 to 20,000.