发明申请
- 专利标题： METHODS FOR COATING A METAL SUBSTRATE AND RELATED COATED METAL SUBSTRATES
- 专利标题（中）： 涂覆金属基材和相关涂层金属基材的方法
-
申请号： US11863919申请日： 2007-09-28
-
公开(公告)号： US20090084682A1公开(公告)日： 2009-04-02
- 发明人: Mark W. McMillen , Edward F. Rakiewicz , Richard F. Karabin , Michelle S. Miles
- 申请人： Mark W. McMillen , Edward F. Rakiewicz , Richard F. Karabin , Michelle S. Miles
- 申请人地址： US OH Cleveland
- 专利权人： PPG Industries Ohio, Inc.
- 当前专利权人： PPG Industries Ohio, Inc.
- 当前专利权人地址： US OH Cleveland
- 主分类号： C25D7/00
- IPC分类号： C25D7/00 ; C25D3/48 ; C25D3/50
摘要：
Disclosed are methods for treating metal substrates, including ferrous substrates, such as cold rolled steel and electrogalvanized steel. The methods include depositing an electropositive metal onto at least a portion of the substrate, and then contacting the substrate with a pretreatment composition that is substantially free of crystalline phosphates and chromates. The present invention also relates to coated substrates produced thereby.