发明授权
US4140821A Process for preheating and preparing ferrous metal for galvanizing
失效
用于预热和制备用于镀锌的黑色金属的工艺
- 专利标题： Process for preheating and preparing ferrous metal for galvanizing
- 专利标题（中）： 用于预热和制备用于镀锌的黑色金属的工艺
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申请号： US664359申请日： 1976-03-05
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公开(公告)号： US4140821A公开(公告)日： 1979-02-20
- 发明人: Schrade F. Radtke , David C. Pearce
- 申请人： Schrade F. Radtke , David C. Pearce
- 申请人地址： NY New York
- 专利权人： International Lead Zinc Research Organization, Inc.
- 当前专利权人： International Lead Zinc Research Organization, Inc.
- 当前专利权人地址： NY New York
- 主分类号： C23C2/02
- IPC分类号： C23C2/02 ; C23C2/06 ; C23C2/30 ; C23C1/02 ; C23C1/12
摘要：
A process for simultaneously preheating and preparing a ferrous surface, prior to the depositing thereon of galvanized zinc coatings, replaces conventional fluxing techniques with the step of immersing a ferrous object in a bath of a molten salt or salts. The salts are chosen so that they are liquid at a temperature below that of the zinc coating step. The liquid acts as a non-fuming flux and preheat for the surface. Particular salts include metallic hydroxides and halides.