-
公开(公告)号:EP1156137A1
公开(公告)日:2001-11-21
申请号:EP01401238.9
申请日:2001-05-15
发明人: Hiroshi, Chihara, Nippon Paint Co., Ltd. , Kenji, Tsuge, Nippon Paint Co., Ltd. , Yutaka, Kinose, Nippon Chemical Industrial Co. Ltd , Toru, Hata, Nippon Chemical Industrial Co. Ltd. , Eriko,Okuno, Nippon Chemical Industrial Co. Ltd. , Takahiro, Nagayama
CPC分类号: C23C22/182 , C23C22/13 , C23C22/365 , C23C22/73
摘要: This invention provides 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 ] therein 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,其特征在于,在碱性磷酸锌水溶液中浸渍基材,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至6500ppm的钠离子和0至20ppm的硫酸根离子,在其中将亚硝酸锌ÄZn(NO2)2Ü浓度设定为NO 2的10重量%。