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公开(公告)号：EP1080246B1
公开(公告)日：2002-11-13
申请号：EP99913685.6
申请日：1999-04-16
发明人： ISHIZUKA, Kiyokazu, Nippon Steel Corporation , SHINDO, Hidetoshi, Nippon Steel Corporation , HAYASHI, Kimitaka, Nippon Steel Corporation , ITO, Daisuke, Nippon Steel Corporation
CPC分类号： C23C28/3225 , C23C22/08 , C23C22/73 , C23C28/345 , Y10T428/12583 , Y10T428/12799 , Y10T428/12951 , Y10T428/12972
摘要： The present invention has an object to provide a surface-treated steel sheet which has highly balanced corrosion resistance and formability, and satisfies fundamental properties required mainly for steel sheets for automobile body, and a manufacturing method thereof. The surface-treated steel sheet of the invention is excellent in corrosion resistance and formability, comprising an amorphous inorganic film containing at least 5 % magnesium and having a weight within a range of from 0.1 to 2.0 g/m2, formed on the surface of a zinc or zinc alloy plated steel sheet; wherein the inorganic film is soluble in an acidic solution and hardly soluble in a neutral or alkaline solution, and a manufacturing method thereof is provided. A zinc phosphate film may be provided between the galvanized steel sheet and the amorphous inorganic film. The inorganic film should preferably comprise one or more selected from the group consisting of phosphoric acid, phosphates, biphosphates, various condensed phosphoric acids, various condensed phosphates, organic phosphoric acid, and organic phosphates.
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2.发明授权PLATED STEEL PRODUCT, PLATED STEEL SHEET AND PRECOATED STEEL SHEET HAVING EXCELLENT RESISTANCE TO CORROSION 有权镀钢产品，电镀钢板和预涂钢板具有优异的耐腐蚀性
公开(公告)号：EP1199376B1
公开(公告)日：2007-05-09
申请号：EP99961441.5
申请日：1999-12-27
发明人： HONDA, Kazuhiko , NISHIMURA, Kazumi, Nippon Steel Corporation , MORIMOTO, Yasuhide, Nippon Steel Corporation , TANAKA, Satoru , SUEMUNE, Yoshihiro , MAKI, Jun, Nippon Steel Corporation Yawata Works , SHINDO, Hidetoshi, Nippon Steel Corporation , SUGIYAMA, Masaaki, Nippon Steel Corporation , FURUKAWA, Hiroyasu , KUROSAKI, Masao, Nippon Steel Corporation , NOMURA, Hiromasa, Nippon Steel Corporation , KANAI, Hiroshi, Nippon Steel Corporation , UEDA, Kohei, Nippon Steel Corporation
CPC分类号： C23C2/02 , B05D7/51 , C23C2/06 , C23C28/00 , C23C28/021 , C23C28/023 , C23C2222/20 , Y10S428/926 , Y10T428/12569 , Y10T428/12799 , Y10T428/12937 , Y10T428/12944 , Y10T428/263 , Y10T428/264 , Y10T428/273
摘要： A plated steel product having excellent resistance to corrosion, characterized in that it comprises, on a steel product, a Zn alloy plating layer having the composition that Mg: 1 to 10 wt. %, Al: 2 to 19 wt. %, Si: 0.01 to 2 wt. %, balance: Zn and inevitable impurities, with the proviso that the amounts of Mg and Al satisfy the relationship: Mg (%) + Al (%) ≤ 20 %, and having a plating layer structure of, for example, an intermetallic compound containing Mg; and a method for producing the plated steel product. Preferably, the plated product further comprises a Ni plating layer as a ground coat. Also provided is a precoated steel sheet having excellent resistance to corrosion, characterized in that it comprises, on the above plating layer, a chromate coating layer as an intermediate layer, and an organic coating layer as a top coat layer in a thickness of 1 to 100 νm, or it comprises, on the plating layer, a chromate coating layer in a thickness corresponding to 10 to 300 mg in terms of metallic chromium/m2, as a top coat layer. The above Zn alloy plating layer can further comprise one or more of 0.01 to 1 wt. % of In, 0.01 to 1 wt. % of Bi, and 1 to 10 wt. % of Sn.
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3.发明公开
公开(公告)号：EP1199376A1
公开(公告)日：2002-04-24
申请号：EP99961441.5
申请日：1999-12-27
发明人： HONDA, Kazuhiko , NISHIMURA, Kazumi, Nippon Steel Corporation , MORIMOTO, Yasuhide, Nippon Steel Corporation , TANAKA, Satoru , SUEMUNE, Yoshihiro , MAKI, Jun, Nippon Steel Corporation Yawata Works , SHINDO, Hidetoshi, Nippon Steel Corporation , SUGIYAMA, Masaaki, Nippon Steel Corporation , FURUKAWA, Hiroyasu , KUROSAKI, Masao, Nippon Steel Corporation , NOMURA, Hiromasa, Nippon Steel Corporation , KANAI, Hiroshi, Nippon Steel Corporation , UEDA, Kohei, Nippon Steel Corporation
CPC分类号： C23C2/02 , B05D7/51 , C23C2/06 , C23C28/00 , C23C28/021 , C23C28/023 , C23C2222/20 , Y10S428/926 , Y10T428/12569 , Y10T428/12799 , Y10T428/12937 , Y10T428/12944 , Y10T428/263 , Y10T428/264 , Y10T428/273
摘要： Provided are a Zn coated steel material, a Zn coated steel sheet and a painted steel sheet excellent in corrosion resistance, and a method of producing the same. Specifically, there is provided coated steel material excellent in corrosion resistance and a method of producing the same, which coated steel material is characterized in that it has, on the surface of steel sheet, a Zn-alloy coating layer containing 1 - 10 wt% of Mg, 2 - 19 wt% of Al and 0.01 - 2 wt% of Si, where Mg and Al satisfy Mg(%) + Al(%) ≤ 20%, the balance being composed of Zn and unavoidable impurities, and has a coating layer structure of a Mg intermetallic compound or the like. As a base metal treatment, it is preferably provided with a Ni coating layer. Also provided are a coated Zn coated steel sheet provided on the coating layer with, as an intermediate layer, a chromate film layer, and further with, as an upper layer, an organic coating layer, and a Zn coated steel sheet excellent in corrosion resistance provided on the coating layer with, as an upper layer, a chromate film, formed by coating with a resin chromate bath and drying, at 10 - 300 mg/m 2 as metallic chromium.
The Zn-alloy coating layer according to the present invention may further contain one or more of 0.01 - 1 wt% of In, 0.01 - 1 wt% of Bi and 1 - 10 wt% of Sn.
Further provided is a painted steel sheet having on the Zn-alloy coating layer a base metal treatment film layer containing 100 parts by weight of resin as solid content and 0.2 - 50 parts by weight of tannin or tannic acid and on the base metal treatment film layer, as an upper layer, an organic coating layer. Preferably the Zn-alloy coating layer further contains 0.01 - 2 wt% of Si, the base metal treatment film layer further contains 10 - 500 parts by weight of fine-grain silica as solid content, the organic coating layer is composed of an undercoating containing an anti-rust pigment and a colored overcoating, and a Ni coating layer is present under the zn-alloy coating layer. Further provided is a painted steel sheet having a base metal treatment film layer containing 100 parts by weight of resin as solid content and 0.1 - 3,000 parts by weight of a silane coupling agent and on the base metal treatment film layer, as an upper layer, an organic coating layer. The Zn-alloy coating layer can contain 0.01 - 2 wt% of Si and the base metal treatment film layer can further contain, as solid content, one or both of 1 - 200 parts by weight of fine-grain silica and 0.1 - 1,000 parts by weight of an etching fluoride.
Moreover, a structure is present wherein intermetallic compound phase of 1 µm or greater major diameter is dispersed in the Zn-alloy coating layer at a content of 0.1 - 50 vol%.
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