发明授权
- 专利标题: Process for the zinc/calcium phosphatizing of metal surfaces at low treatment temperatures
- 专利标题(中): 在低处理温度下金属表面的锌/钙磷酸化过程
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申请号: US703251申请日: 1985-02-20
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公开(公告)号: US4622078A公开(公告)日: 1986-11-11
- 发明人: Reinhard Opitz , Manfred Breuer
- 申请人: Reinhard Opitz , Manfred Breuer
- 申请人地址: DEX Cologne
- 专利权人: Gerhard Collardin GmbH
- 当前专利权人: Gerhard Collardin GmbH
- 当前专利权人地址: DEX Cologne
- 优先权: DEX3407513 19840301
- 主分类号: C23C22/12
- IPC分类号: C23C22/12 ; C23C22/13 ; C23C22/22 ; C23C22/36
摘要:
The invention relates to a process for phosphatizing metal surfaces with an acidic phosphatizing solution containing zinc ions, calcium ions, phosphate ions and accelerators and, optionally, other additives, characterized in that, after degreasing and without activation, the metal surfaces are brought into contact at 30.degree. to 65.degree. C. with solutions which contain Zn.sup.2+, Ca.sup.2+, PO.sub.4.sup.3- and, as accelerators, nitrate and/or nitrite and/or chlorate ions and/or an organic nitro compound and/or H.sub.2 O.sub.2 or an inorganic peroxide and which have a pH-value of from 2.2 to 3.8, a ratio of free acid to toal acid of from 1:10 to 1:60 and a ratio by weight of (Ca.sup.2+ +Zn.sup.2+) to PO.sub.4.sup.3- of from 1:>8 to 1:40, and to the use of this process for pretreating the metal surfaces for painting by electrodeposition, particularly by cathodic electrodeposition.
公开/授权文献
- US5722732A Shoulder belt retractor with headrest support 公开/授权日:1998-03-03