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1. 发明授权

EP0866888B1 VERFAHREN ZUR PHOSPHATIERUNG VON METALLOBERFLÄCHEN 有权转让
标题翻译：金属表面磷化方法
公开(公告)号：EP0866888B1
公开(公告)日：1999-06-16
申请号：EP96938047.6
申请日：1996-11-02
申请人： Metallgesellschaft Aktiengesellschaft
发明人： GEHMECKER, Horst , KOLBERG, Thomas , REIN, Rüdiger
IPC分类号： C23C22/17 , C23C22/18
CPC分类号： C23C22/17 , C23C22/182
摘要： The invention concerns a method of phosphating metal surfaces consisting at least partially of iron or steel using low-zinc technology, in which the metal surfaces are brought into contact with aqueous acidic phosphating solutions at between 30 and 65 DEG C for between 1 and 8 minutes. The phosphating solutions contain: between 0.4 and 2.0 g/l Zn; between 7 and 25 g/l P2O5; between 0.005 and 0.5 g/l peroxide (calculated as H2O2); and between 0.01 and 10 g/l formiate (calculated as formiate ion). The phosphating solutions are free from chlorate and added nitrite, the weight ratio of free P2O5 to total P2O5 therein is set at a value of between 0.03 and 0.20, and the amount of free acid is set at a value of between 0.5 and 2.5. Additionally, the phosphating solutions can contain up to 30 g/l nitrate and manganese, magnesium, calcium, lithium, tungstate, vanadate, molybdate or combinations thereof, optionally also nickel and/or cobalt each in amounts of up to 3 g/l, and optionally also up to 0.030 g/l copper. The weight ratios of Mn : Zn, Mg : Zn, Ca : Zn and optionally of Ni and/or Co : Zn should be at most 2 : 1 in each case. The method is suitable in particular for preparing metal surfaces for subsequent electrophoretic enamelling, in particular cathodic electrophoretic enamelling.

2. 发明公开

EP0866888A1 VERFAHREN ZUR PHOSPHATIERUNG VON METALLOBERFLÄCHEN 有权转让
标题翻译：金属表面磷化方法
公开(公告)号：EP0866888A1
公开(公告)日：1998-09-30
申请号：EP96938047.0
申请日：1996-11-02
申请人： METALLGESELLSCHAFT AKTIENGESELLSCHAFT
发明人： GEHMECKER, Horst , KOLBERG, Thomas , REIN, Rüdiger
IPC分类号： C23C22
CPC分类号： C23C22/17 , C23C22/182
摘要： The invention concerns a method of phosphating metal surfaces consisting at least partially of iron or steel using low-zinc technology, in which the metal surfaces are brought into contact with aqueous acidic phosphating solutions at between 30 and 65 °C for between 1 and 8 minutes. The phosphating solutions contain: between 0.4 and 2.0 g/l Zn; between 7 and 25 g/l P2O5; between 0.005 and 0.5 g/l peroxide (calculated as H2O2); and between 0.01 and 10 g/l formiate (calculated as formiate ion). The phosphating solutions are free from chlorate and added nitrite, the weight ratio of free P2O5 to total P2O5 therein is set at a value of between 0.03 and 0.20, and the amount of free acid is set at a value of between 0.5 and 2.5. Additionally, the phosphating solutions can contain up to 30 g/l nitrate and manganese, magnesium, calcium, lithium, tungstate, vanadate, molybdate or combinations thereof, optionally also nickel and/or cobalt each in amounts of up to 3 g/l, and optionally also up to 0.030 g/l copper. The weight ratios of Mn : Zn, Mg : Zn, Ca : Zn and optionally of Ni and/or Co : Zn should be at most 2 : 1 in each case. The method is suitable in particular for preparing metal surfaces for subsequent electrophoretic enamelling, in particular cathodic electrophoretic enamelling.

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