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1. 发明授权

US4849031A Process of producing phosphate coatings on metal surfaces 失效
标题翻译：在金属表面生产磷酸盐涂层的工艺
公开(公告)号：US4849031A
公开(公告)日：1989-07-18
申请号：US92951
申请日：1987-09-04
申请人： Dieter Hauffe , Gisela Beege , Peter Mischke , Werner Rausch
发明人： Dieter Hauffe , Gisela Beege , Peter Mischke , Werner Rausch
IPC分类号： C23C22/36 , C23C22/77 , C23C22/12
CPC分类号： C23C22/362 , C23C22/77
摘要： Disclosed is a process of producing phosphate coatings on surfaces which consist of aluminum or its alloys and of at least one of the materials steel and galcanized steel by spraying or by spraying and dipping. Uniform phosphate layers having a high cover factor are obtained by the use of a phosphating solution which contains about 0.4 to about 0.8 g/l Zn, about 10 to about 20 g/l P.sub.2 O.sub.5, at least one accelerator and about 80 to about 220 mg/l fluoride ("F(el)"), as determined by a fluoride-sensitive electrode immersed into the bath solution and in which the content of free acid (FA) (in points) has been adjusted to and is maintained at a value corresponding to FA=(0.5 to 1.0)+K wherein K is calculated as K=(0.002 to 0.012).times.F(el). The free acid (FA) content is preferably adjusted to and maintained at FA=(0.04 to 0.06).times.C.sub.P.sbsb.2.sub.O.sbsb.5 +K and the content of free acid (FA) is determined using K=(0.003 to 0.009).times.F(el). The process is particularly suitable for preparing the surfaces for being painted, preferably by electrophoretic dip painting.
摘要翻译：公开了一种通过喷涂或喷涂和浸渍在由铝或其合金和至少一种材料钢和镓化钢组成的表面上生产磷酸盐涂层的方法。通过使用含有约0.4至约0.8g / l的Zn，约10至约20g / l的P 2 O 5，至少一种促进剂和约80至约220mg的磷酸盐溶液获得具有高覆盖系数的均匀磷酸盐层 /氟化物（“F（el）”），其通过浸入浴溶液中的氟化物敏感电极测定，其中游离酸（FA）的含量（以点计）已被调节并保持在值对应于FA =（0.5〜1.0）+ K，其中K被计算为K =（0.002至0.012）×F（el）。优选将游离酸（FA）含量调节至FA =（0.04〜0.06）×CP2O5 + K，并且使用K =（0.003〜0.009）×F（el）求出游离酸（FA）的含量。该方法特别适于制备用于涂漆的表面，优选通过电泳浸涂。

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