发明申请
- 专利标题: Surface-treated steel sheet excellent in resistance to white rust and method for production thereof
- 专利标题(中): 耐白锈菌性优异的表面处理钢板及其制造方法
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申请号: US10515303申请日: 2003-02-14
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公开(公告)号: US20050147832A1公开(公告)日: 2005-07-07
- 发明人: Kazuhisa Okai , Akira Matsuzaki , Naoto Yoshimi , Takahiro Kubota , Masaaki Yamashita , Hisato Noro , Haruo Nakamichi , Kaoru Sato , Hiroyasu Matsuki , Reijiro Nishida , Masahiro Murata , Shoichi Tanaka , Yoshikazu Morohoshi , Shingo Amaki
- 申请人: Kazuhisa Okai , Akira Matsuzaki , Naoto Yoshimi , Takahiro Kubota , Masaaki Yamashita , Hisato Noro , Haruo Nakamichi , Kaoru Sato , Hiroyasu Matsuki , Reijiro Nishida , Masahiro Murata , Shoichi Tanaka , Yoshikazu Morohoshi , Shingo Amaki
- 优先权: JP2002-214579 20020723
- 国际申请: PCT/JP03/01531 WO 20030214
- 主分类号: B05D7/00
- IPC分类号: B05D7/00 ; C08G59/40 ; C09D5/08 ; C09D163/00 ; C23C22/07 ; C23C22/08 ; C23C22/12 ; C23C22/18 ; C23C22/20 ; C23C22/22 ; C23C22/34 ; C23C22/42 ; B32B15/08 ; B32B15/18
摘要:
The invention is to provide a surface-treated steel sheet of good white rust resistance with no chromium in its surface treatment film, and it has realized a surface-treated steel sheet of higher-level corrosion resistance by forming a reaction layer of plating metal with a barrier layer effective for anticorrosion not in a two-layered film but in a single-layered film. The surface-treated steel sheet is fabricated by applying a surface-treating composition that contains: (a) a water-dispersible resin and/or a water-soluble resin obtained through reaction of an epoxy group-containing resin (A) with an active hydrogen-containing compound (B) a part or all of which is an active hydrogen-containing hydrazine derivative and preferably with a hydrophilic organic component (C), (b) a silane coupling agent, (c) a phosphoric acid and/or a hexafluoro-metal acid, and (d) preferably an aqueous dispersion of an urethane resin, to a zinc-plated or aluminium-plated steel sheet followed by drying it to form thereon a surface treatment film having a thickness of from 0.02 to 5 μm. Regarding its film structure, the surface treatment film comprises an amorphous compound layer containing P, Zn and/or Al, and O, and an overlying organic resin matrix layer where the matrix is a hydrazine derivative-modified epoxy group-containing resin or the epoxy group-containing resin and an urethane resin.