发明授权
- 专利标题: Chromium and fluoride free metal treatment
- 专利标题(中): 铬和氟化物的金属处理
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申请号: US396942申请日: 1995-03-01
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公开(公告)号: US5518555A公开(公告)日: 1996-05-21
- 发明人: Jiangbo Ouyang , William L. Harpel
- 申请人: Jiangbo Ouyang , William L. Harpel
- 申请人地址: PA Trevose
- 专利权人: Betz Laboratories, Inc.
- 当前专利权人: Betz Laboratories, Inc.
- 当前专利权人地址: PA Trevose
- 主分类号: C23C22/60
- IPC分类号: C23C22/60 ; C23C22/68 ; C23F11/173 ; C23C22/77
摘要:
A heavy metal and fluoride free pretreatment for a metal surface which enhances corrosion resistance and surface adhesion properties is described. The pretreatment is an aqueous solution of an anionic polyacrylamide which can be rinsed or dried in place.
公开/授权文献
- US4913042A Deep fat fryer 公开/授权日:1990-04-03
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