公开(公告)号：EP3303486B1

公开(公告)日：2019-03-20

申请号：EP16727440.6

申请日：2016-06-01

申请人： Atotech Deutschland GmbH

发明人： ROUSSEAU, Agnes ,  TAYLOR, Stephen

IPC分类号： C23C22/34 ,  C23C22/80 ,  C23C22/83 ,  C23C22/73 ,  C09D5/08

公开(公告)号：EP3303486A1

公开(公告)日：2018-04-11

申请号：EP16727440.6

申请日：2016-06-01

申请人： Atotech Deutschland GmbH

发明人： ROUSSEAU, Agnes ,  TAYLOR, Stephen

IPC分类号： C09D5/08 ,  C23C22/34 ,  C23C22/80 ,  C23C22/83

CPC分类号： C09D5/084 ,  C23C22/34 ,  C23C22/73 ,  C23C22/80 ,  C23C22/83 ,  C23C2222/10 ,  C25D9/02

摘要： The present invention relates to an acidic aqueous composition for treating of zirconium-pretreated metal-based substrate surfaces such as steel metals or aluminium surfaces, a process for treating the substrate surfaces with the composition and the use of the composition as post-treatment of zirconium-pretreated metal-based substrate surfaces for subsequent electrocoating of the surfaces to increase corrosion resistance of said metal-based surfaces prior to electro-coating (e-coat) applications and increases detergent and chemical resistance of treated surfaces used in the white goods industry. The acidic aqueous composition comprises trivalent chromium ions; and hexafluorozirconate ions; characterized in that the source of trivalent chromium ions is a trivalent chromium nitrate salt.