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2. 发明授权

US5039361A Process of phosphating metal surfaces 失效
标题翻译：磷化金属表面的工艺
公开(公告)号：US5039361A
公开(公告)日：1991-08-13
申请号：US443212
申请日：1989-11-28
申请人： Dieter Hauffe , Jorg Hieke , Rudolf Vey , Gunter Siemund , Han-Yong Oei
发明人： Dieter Hauffe , Jorg Hieke , Rudolf Vey , Gunter Siemund , Han-Yong Oei
IPC分类号： C23C22/00 , C23C22/13 , C23C22/73
CPC分类号： C23C22/00 , C23C22/13 , C23C22/182 , C23C22/36 , C23C22/73 , C23C22/86
摘要： During a method of phosphating a metal surface which includes at least in part iron or steel and is dipped into or flooded with a phosphating solution which contains layer-forming cations and nitrate or equivalent accelerators, the iron content is limited by a precipitation of iron phosphate. A partial volume of the phosphating solution is intermittently withdrawn from the bath tank and in a separate aerator is contacted with oxygen or an oxygen-containing gas. The iron phosphate sludge is removed from the resulting solution, which is then returned to the bath tank. The partial volume of the phosphating solution is supplied from below into and is aerated in an aerator, which is provided with an aspirating aerating agitator and which is tapered at least in its lower portion. When the aerator has been terminated, the phosphating solution which has been depleted of iron(II) is sucked off upwardly and is returned to the bath tank.
摘要翻译：在磷化金属表面的方法中，该金属表面至少部分包括铁或钢，并浸入含有形成层的阳离子和硝酸盐或等效促进剂的磷酸盐溶液或淹没物中，铁含量受磷酸铁沉淀的限制。将部分体积的磷酸盐溶液间歇地从浴槽中取出，并且在单独的曝气器中与氧气或含氧气体接触。从所得溶液中除去磷酸铁污泥，然后将其返回到浴槽。磷酸盐溶液的部分体积从下方供给到曝气器中，曝气器设置有吸气式充气搅拌器，至少在其下部逐渐变细。当曝气器已经被终止时，已经耗尽铁（II）的磷化溶液被向上抽吸并返回到浴槽。

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