Holtz, Holtz, Goodman & Chick, PC
Surface-treated steel sheet with excellent corrosion resistance and method for manufacturing same
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.
Kansai Paint Co., Ltd. JFE Steel Corporation
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Y10T C23C Y10T C09D Y10T C23C Y10T Y10T C23C Y02T Y10T Y10T Y10T Y10T Y10T
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Akira Syoichi Takashi Masahiro Kenichi Naoto Kazuhisa Tatsuya Takao
Matsuzaki Tanaka Nakano Murata Sasaki Yoshimi Okai Miyoshi Ooshima