公开(公告)号：US5635084A

公开(公告)日：1997-06-03

申请号：US447075

申请日：1995-05-22

申请人： Florian B. Mansfeld ,  You Wang ,  Simon H. Lin

发明人： Florian B. Mansfeld ,  You Wang ,  Simon H. Lin

IPC分类号： C25D11/06 ,  C25F3/04 ,  C25F3/06 ,  B44C1/22

CPC分类号： C23C22/68 ,  C23C22/78 ,  C23F1/00 ,  C25D11/06 ,  C25F3/04 ,  C25F3/06

摘要： A method for treating the surface of aluminum alloys hang a relatively high copper content is provided which includes the steps of removing substantially all of the copper from the surface, contacting the surface with a first solution containing cerium, electrically charging the surface while contacting the surface in an aqueous molybdate solution, and contacting the surface with a second solution containing cerium. The copper is substantially removed from the surface in the first step either by (i) contacting the surface with an acidic chromate solution or by (ii) contacting the surface with an acidic nitrate solution while subjecting the surface to an electric potential. The corrosion-resistant surface resulting from the invention is excellent, consistent and uniform throughout the surface. Surfaces treated by the invention may often be certified for use in salt-water services.

公开(公告)号：US5582654A

公开(公告)日：1996-12-10

申请号：US247147

申请日：1994-05-20

申请人： Florian B. Mansfeld ,  You Wang ,  Simon H. Lin

发明人： Florian B. Mansfeld ,  You Wang ,  Simon H. Lin

IPC分类号： C25D11/06 ,  C25F3/04 ,  C25F3/06 ,  C23C22/50

CPC分类号： C23F1/00 ,  C23C22/68 ,  C23C22/78 ,  C25D11/06 ,  C25F3/04 ,  C25F3/06

摘要： A method for treating the surface of aluminum alloys having a relatively high copper content is provided which includes the steps of removing substantially all of the copper from the surface, contacting the surface with a first solution containing cerium, electrically charging the surface while contacting the surface in an aqueous molybdate solution, and contacting the surface with a second solution containing cerium. The copper is substantially removed from the surface in the first step either by (i) contacting the surface with an acidic chromate solution or by (ii) contacting the surface with an acidic nitrate solution while subjecting the surface to an electric potential. The corrosion-resistant surface resulting from the invention is excellent, consistent and uniform throughout the surface. Surfaces treated by the invention may often be certified for use in salt-water services.

摘要翻译： 提供了一种用于处理铜含量相对较高的铝合金表面的方法，其包括从表面去除基本上所有的铜的步骤，使表面与含有铈的第一溶液接触，同时使表面接触，同时接触表面 在钼酸水溶液中，并使表面与含有铈的第二溶液接触。 通过（i）使表面与酸性铬酸盐溶液接触或（ii）使表面与酸性硝酸盐溶液接触，同时使表面经受电位，铜在第一步骤中基本上从表面除去。 由本发明产生的耐腐蚀表面在整个表面上是优异的，一致的和均匀的。 通过本发明处理的表面通常可以被认证用于盐水服务。