公开(公告)号：US4101345A

公开(公告)日：1978-07-18

申请号：US745000

申请日：1976-11-26

申请人： Robert F. Hunter ,  Stephen R. Koprich ,  Richard G. Baird-Kerr ,  Daniel S. Sakai

发明人： Robert F. Hunter ,  Stephen R. Koprich ,  Richard G. Baird-Kerr ,  Daniel S. Sakai

IPC分类号： C23C2/02 ,  C23C2/06 ,  C23C1/02

CPC分类号： C23C2/02 ,  C23C2/06

摘要： Mild steel strip is galvanized in selected areas only, typically on one side only of the strip, by pretreating the areas selected for absence of galvanizing to form thereon a readily chemically strippable coating of chemically hydrated compounds non-wetting in molten zinc. Preferably, the pretreatment is carried out using phosphoric acid solution to form thereon a thin coating of a composite of hydrated iron phosphates and iron hydroxides. After passing the thus-treated steel strip through the molten zinc bath and solidification of the zinc coating, the composite coating is removed by dilute mineral acid. Mild steel strip galvanized on one side using this procedure has particular utility in the automotive industry.

摘要翻译： 轻度钢带仅在选定区域镀锌，通常仅在钢带的一侧上，通过预处理选择不进行镀锌的区域，在其上形成易于化学剥离的化学水合化合物在熔融锌中不湿润的化合物的涂层。 优选地，使用磷酸溶液进行预处理，以在其上形成水合铁磷酸盐和氢氧化铁的复合物的薄涂层。 在经过如此处理的钢带通过熔融锌浴和锌涂层的固化之后，通过稀的无机酸去除复合涂层。 使用该程序在一侧镀锌的轻钢带在汽车工业中具有特殊的用途。