摘要:
Provided is a surface-treated steel material having cut edge corrosion resistance that is equal to or more than that of a chromate treatment without use of hexavalent chromium. The surface-treated steel material includes a coating film formed on a surface of a steel material through a plating layer. The plating layer is obtained by immersing the steel material in a galvalume bath containing Mg. In the surface-treated steel material, the coating film is formed using a coating composition containing a coating film-forming resin, a cross-linking agent, a predetermined vanadium compound, and trimagnesium phosphate; the vanadium compound is a compound satisfying a predetermined electrical conductivity; the content of the vanadium compound is restricted to a predetermined amount relative to 100% by mass of a total of a solid content of the coating film-forming resin and a solid content of the cross-linking agent; the vanadium compound satisfies a predetermined pH; and the content of the trimagnesium phosphate is a predetermined amount relative to 100% by mass of the total of the solid content of the coating film-forming resin and the solid content of the cross-linking agent.
摘要:
An aqueous surface treatment composition for coated steel sheet securing sufficient working adhesion while causing the formation of a surface treatment layer imparting excellent overhang corrosion resistance even without containing chrome, that is, a surface treatment composition containing a specific organic silicon compound, hexafluorometallic acid, a urethane resin having specific cationic groups, a vanadium compound, and an aqueous medium and sufficiently securing working adhesion while imparting excellent overhang corrosion resistance by the urethane resin having cationic groups and a total amine value of specific values is provided.
摘要:
A wiping device which blows a wiping gas toward a steel sheet from a pair of wiping nozzles disposed on both sides of the steel sheet so as to face sheet surfaces of the steel sheet, wherein the steel sheet is interposed between the pair of wiping nozzles and is pulled from a hot dip coating bath, the device includes a suctioning tube, wherein: the suctioning tube is disposed on both sides in a width direction of a section of the steel sheet, the section being positioned between the pair of wiping nozzles, so that the suctioning tube is in parallel to the steel sheet; the suctioning tube has a suctioning port that suctions an air; the suctioning port is disposed to face a side end surface of the steel sheet; a cross-sectional shape of the suctioning tube has the largest dimension thereof along a pulling direction of the steel sheet.
摘要:
A Zn-Al-Mg-Si alloy plated steel product having excellent corrosion resistance characterized in that the alloy coating layer thereof comprises, in mass %, 45 to 70 % of Al, 3 % or more and less than 10 % of Mg, 3 % or more and less than 10 % of Si, the balance of the layer being Zn and inevitable impurities, provided that Al/Zn is 0.89 to 2.75, and contains a Mg2Si phase in a bulk form; and a Zn-Al-Mg-Si alloy plated steel product having excellent corrosion resistance characterized in that the alloy coating layer thereof comprises, in mass %, 45 to 70 % of Al, 1 % or more and less than 5 % of Mg, 0.5 % or more and less than 3 % of Si, the balance of the layer being Zn and inevitable impurities, provided that Al/Zn is 0.89 to 2.75, and contains a Mg2Si phase in a flake form.
摘要:
The present invention provides a Zn-Al-Mg-Si alloy-plated steel material with excellent corrosion resistance, characterized by comprising, in terms of wt%, Al: at least 45% and no greater than 70%, Mg: at least 1% and less than 5%, Si: at least 0.5% and less than 3%, with the remainder Zn and unavoidable impurities, wherein the Al/Zn ratio is 0.89-2.75 and the plating layer contains a scaly Mg 2 Si phase.
摘要:
The aluminum-zinc plated steel sheet according to the present invention includes a plated steel sheet and a covering film that covers the plated steel sheet. The covering film contains a basic compound of transition metal other than cobalt and chromium, and metallic cobalt, or metallic cobalt and a cobalt compound. An amount of the covering film per one side is within a range of 0.01 to 0.8 g/m 2 . An amount in terms of mass of transition metal other than cobalt in the covering film per one side of the plated steel sheet is within a range of 4 to 400 mg/m 2 . An amount in terms of mass of cobalt in the covering film per one side of the plated steel sheet is within a range of 0.1 to 20 mg/m 2 .
摘要翻译:根据本发明的镀铝锌钢板包括镀覆钢板和覆盖镀覆钢板的覆盖膜。 被覆膜含有除钴和铬以外的过渡金属的碱性化合物和金属钴,或金属钴和钴化合物。 单面的被覆膜的量在0.01〜0.8g / m 2的范围内。 电镀钢板的单面的被覆膜中的钴以外的过渡金属的质量的范围为4〜400mg / m 2。 以电镀钢板的单面的被覆膜中的钴的质量换算量在0.1〜20mg / m 2的范围内。
摘要:
An aqueous surface treatment composition for coated steel sheet securing sufficient working adhesion while causing the formation of a surface treatment layer imparting excellent overhang corrosion resistance even without containing chrome, that is, a surface treatment composition containing a specific organic silicon compound, hexafluorometallic acid, a urethane resin having specific cationic groups, a vanadium compound, and an aqueous medium and sufficiently securing working adhesion while imparting excellent overhang corrosion resistance by the urethane resin having cationic groups and a total amine value of specific values is provided.
摘要:
The aluminum-zinc plated steel sheet according to the present invention includes a plated steel sheet and a covering film that covers the plated steel sheet. The covering film contains a basic compound of transition metal other than cobalt and chromium, and metallic cobalt, or metallic cobalt and a cobalt compound. An amount of the covering film per one side is within a range of 0.01 to 0.8 g/m 2 . An amount in terms of mass of transition metal other than cobalt in the covering film per one side of the plated steel sheet is within a range of 4 to 400 mg/m 2 . An amount in terms of mass of cobalt in the covering film per one side of the plated steel sheet is within a range of 0.1 to 20 mg/m 2 .
摘要翻译:根据本发明的镀锌钢板包括镀覆钢板和覆盖镀覆钢板的覆盖膜。 覆盖膜包含除钴和铬之外的过渡金属的碱性化合物,以及金属钴,或金属钴和钴化合物。 每一面的覆盖膜的量在0.01〜0.8g / m 2的范围内。 在镀覆钢板的每一侧的覆盖膜中,钴以外的过渡金属质量的量在4〜400mg / m 2的范围内。 镀覆钢板每一面的覆盖膜中的钴的质量的量在0.1〜20mg / m 2的范围内。