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公开(公告)号：EP1225250A3
公开(公告)日：2003-07-16
申请号：EP02001002.1
申请日：2002-01-16
发明人： Chihara, Hiroshi , Tsuge, Kenji , Kinose, Yutaka , Hata, Toru , Okuno, Eriko
CPC分类号： C23C22/365 , C23C22/13 , C23C22/182 , C23C22/73
摘要： The present invention is to provide a metal surface-treating method which is capable of forming a zinc phosphate coat suitable for the cationic electrodeposition coating of a metallic shaped product, particularly a metallic shaped product having both an iron type metallic surface and a zinc type metallic surface and is suited to a closed system. A metal surface-treating method which comprises a chemical conversion step of dipping a substrate in an acidic aqueous zinc phosphate solution, and using an aqueous zinc nitrite solution as an accelerator, said aqueous zinc nitrite solution being substantially free of calcium ion and containing 0 to 6500 ppm of sodium ion and 0 to 20 ppm of sulfate ion in case of assuming the concentration of zinc nitrite [Zn(NO 2 ) 2 ] to be 10 weight % as NO 2 .
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公开(公告)号：EP1225250A2
公开(公告)日：2002-07-24
申请号：EP02001002.1
申请日：2002-01-16
发明人： Chihara, Hiroshi , Tsuge, Kenji , Kinose, Yutaka , Hata, Toru , Okuno, Eriko
CPC分类号： C23C22/365 , C23C22/13 , C23C22/182 , C23C22/73
摘要： The present invention is to provide a metal surface-treating method which is capable of forming a zinc phosphate coat suitable for the cationic electrodeposition coating of a metallic shaped product, particularly a metallic shaped product having both an iron type metallic surface and a zinc type metallic surface and is suited to a closed system.
A metal surface-treating method which comprises a chemical conversion step of dipping a substrate in an acidic aqueous zinc phosphate solution, and using an aqueous zinc nitrite solution as an accelerator, said aqueous zinc nitrite solution being substantially free of calcium ion and containing 0 to 6500 ppm of sodium ion and 0 to 20 ppm of sulfate ion in case of assuming the concentration of zinc nitrite [Zn(NO 2 ) 2 ] to be 10 weight % as NO 2 .摘要翻译： 本发明提供一种金属表面处理方法，其能够形成适用于金属成型制品的阳离子电沉积涂层的磷酸锌涂层，特别是具有铁型金属表面和锌型金属的金属成形制品 表面，适用于封闭系统。 一种金属表面处理方法，其特征在于，包括在酸性磷酸锌水溶液中浸渍基材并使用亚硝酸锌水溶液作为促进剂的化学转化工序，所述亚硝酸锌水溶液基本上不含钙离子，含有0〜 在将亚硝酸锌ÄZn（NO2）2Ü浓度设定为NO2的10重量％的情况下，6500ppm的钠离子和0至20ppm的硫酸根离子。
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