专利详情

专利名称	Chromate-free conversion film solution and the method of applying the solution to magnesium alloys
申请号	US20100832163	专利类型	US
公开（公告）号	US8696831(B2)	公开（授权）日	2014.04.15
申请（专利权）人	中国科学院金属研究所	发明（设计）人	SHAN DAYONG;SONG YINGWEI;HAN ENHOU;CHEN RONGSHI;KE WEI
主分类号	C23C22/48	IPC主分类号	C23C22/48;C23C22/07;C23C22/18
专利有效期	Chromate-free conversion film solution and the method of applying the solution to magnesium alloys 至Chromate-free conversion film solution and the method of applying the solution to magnesium alloys	法律状态
说明书摘要	Disclosed herein is a chromate-free conversion film solution and a method of applying the solution to magnesium and magnesium alloys. The solution contains zirconium ions, manganese ions, barium ions and phosphate corrosion inhibitor; and the pH of the said solution is in the range of 1-5; and may further comprise molybdate as accelerant. The method comprises degreasing, acid etching, surface activation, surface adjusting, and film forming steps. The conversion film obtained in accordance with the disclosed method is uniform, smooth, and compact and has high corrosion resistance and good adhesion with paint film. Moreover, the chromate-free conversion film solution is environmentally friendly and possesses fast film growth rates.