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基本信息:
- 专利标题: 一种压铸铝合金零部件无铬稀土环保化学转化处理方法
- 专利标题(英):Chromium-free rare-earth environment-friendly chemical conversion treatment method of die casting aluminium alloy part
- 申请号:CN201110157139.3 申请日:2011-06-13
- 公开(公告)号:CN102212812A 公开(公告)日:2011-10-12
- 发明人: 庞晓露 , 朱政 , 高克玮 , 王化平 , 陶保健
- 申请人: 北京科技大学 , 瑞立集团瑞安汽车零部件有限公司
- 申请人地址: 北京市海淀区学院路30号
- 专利权人: 北京科技大学,瑞立集团瑞安汽车零部件有限公司
- 当前专利权人: 北京科技大学,瑞立集团瑞安汽车零部件有限公司
- 当前专利权人地址: 北京市海淀区学院路30号
- 代理机构: 北京东方汇众知识产权代理事务所
- 代理人: 刘淑芬
- 主分类号: C23C22/34
- IPC分类号: C23C22/34 ; C23C22/36
The invention relates to a chromium-free environment-friendly chemical conversion treatment process of a die casting aluminium alloy part, comprising the steps of: surface sand-blasting treatment of the die casting aluminium alloy part, surface pre-treatment of the die casting aluminium alloy part, preparation of a chromium-free environment-friendly conversion solution, chemical conversion treatment, and sealing treatment after the chemical conversion treatment. One composition of a chemical conversion coating layer is oxide of tetravalent cerium. The chemical conversion coating layer is uniform and tawny with the thickness about 2 mum. The chemical conversion coating layer prepared with the method has an excellent corrosion resisting property, is on a par with a trivalent chromium chemical conversion coating, and has high binding strength with a matrix. Products or discharges after the chemical conversion treatment do not contain hexavalent chromium, which is harmful to the environment and human health.
公开/授权文献:
- CN102212812B 一种压铸铝合金零部件无铬稀土环保化学转化处理方法 公开/授权日:2013-09-18