Patent ID: 8221559
Filing Date: 2012-07-17
Classification: C23C,C25D

Abstract:
1. A metal surface treatment liquid for cation electrodeposition coating which comprises zirconium ions, copper ions and other metal ions, and has a pH of 1.5 to 6.5, wherein: the other metal ions are at least one selected from the group consisting of tin ions, indium ions, aluminum ions, niobium ions, tantalum ions, yttrium ions and cerium ions; the concentration of zirconium ions is in the range of 10 to 10,000 ppm; the concentration ratio of the copper ions to the zirconium ions is in the range of 0.005 to 1 on a mass basis; and the concentration ratio of the other metal ions to the copper ions is in the range of 0.1 to 1,000 on a mass basis; and further comprising a hydrolysis condensate of aminosilane.