公开(公告)号：US4824490A

公开(公告)日：1989-04-25

申请号：US110949

申请日：1987-10-20

申请人： Han Yong Oei ,  Gunter Siemund ,  Rudolf Vey

发明人： Han Yong Oei ,  Gunter Siemund ,  Rudolf Vey

IPC分类号： C23C22/13 ,  C23C22/18 ,  C23C22/36 ,  C23C22/17 ,  C23C22/86

CPC分类号： C23C22/364

摘要： Disclosed is a process of producing a phosphate coating on a metal having a surface which consists at least in part of iron or steel. The metal is contacted at a temperature in the range from 30.degree. to 50.degree. C. with a phosphatizing solution which contains 5 to 25 g/l zinc, 1 to 10 g/l manganese, 0.1 to 13 g/l iron(II), 5 to 40 g/l phosphate (calculated as P.sub.2 O.sub.5), 5 to 50 g/l nitrate, and which also contains 0.5 to 5 g/l fluoroborate (calculated as BF.sub.4), and 0.05 to 3 g/l tartaric acid and/or citric acid. The solution has been adjusted to weight ratios of Zn:P.sub.2 O.sub.5 =(0.5 to 3):1 and of Mn:Zn=(0.04 to 0.5):1 and to a ratio of free acid to total acid of (0.04 to 0.2):1.It is preferred to add nickel, copper and/or calcium to the phosphatizing solution and to adjust it to a content of Fe(II) not in excess of 10 g/l. The process is particularly suitable for preparing metals for cold working.

摘要翻译： 公开了一种在具有至少部分由铁或钢构成的表面的金属上生产磷酸盐涂层的方法。 金属在30〜50℃的温度下与含有5〜25g / l的锌，1〜10g / l的锰，0.1〜13g / l的铁（II）的磷酸盐化溶液接触， ，5〜40g / l磷酸盐（以P2O5计算），5〜50g / l硝酸盐，还含有0.5〜5g / l氟硼酸盐（以BF 4计），0.05〜3g / l酒石酸和/ 或柠檬酸。 该溶液已经根据Zn:P2O5 =（0.5-3 ):1和Mn:Zn =（0.04-0.5 ):1的重量比和游离酸与总酸的比例（0.04-0.2）进行了调整： 1。 优选向磷酸盐溶液中加入镍，铜和/或钙，并将其调节至不超过10g / l的Fe（II）含量。 该方法特别适用于制备用于冷加工的金属。