公开(公告)号：EP2576861A1

公开(公告)日：2013-04-10

申请号：EP10721503.0

申请日：2010-05-26

申请人： Atotech Deutschland GmbH

发明人： HOFMANN, Udo ,  KRENZEL, Volker

IPC分类号： C23C22/06 ,  C23C22/12 ,  C23C22/17 ,  C23C22/20 ,  C23C22/73 ,  C25D3/00 ,  C25D3/02 ,  C25D11/00 ,  C25D11/38 ,  C23C22/82 ,  C23C22/77 ,  C23C22/60 ,  C23C22/83

CPC分类号： C09D5/08 ,  C23C22/362 ,  C23C22/73 ,  C23C2222/10 ,  C25D5/36 ,  C25D11/38

摘要： The invention relates to a process for producing a corrosion-inhibiting coating for substrates having a surface consisting of zinc, magnesium, aluminium or one of their alloys, wherein the surface to be treated is brought into contact in direct succession with two aqueous treatment solutions containing chromium(lll) ions, metal ions of the substrate surface to be treated and at least one complexing agent. The first treatment solution has a pH in the range from 1.0 to 4.0, while the second treatment solution has a pH of from 3.0 to 12.0. The process of the invention produces a smaller amount of wastewater polluted with heavy metals.

公开(公告)号：EP2576861B1

公开(公告)日：2014-11-26

申请号：EP10721503.0

申请日：2010-05-26

申请人： Atotech Deutschland GmbH

发明人： HOFMANN, Udo ,  KRENZEL, Volker

IPC分类号： C23C22/06 ,  C23C22/12 ,  C23C22/17 ,  C23C22/20 ,  C23C22/73 ,  C25D3/00 ,  C25D3/02 ,  C25D11/00 ,  C25D11/38 ,  C23C22/82 ,  C23C22/77 ,  C23C22/60 ,  C23C22/83

CPC分类号： C09D5/08 ,  C23C22/362 ,  C23C22/73 ,  C23C2222/10 ,  C25D5/36 ,  C25D11/38

公开(公告)号：EP2449149B1

公开(公告)日：2012-12-19

申请号：EP10728680.9

申请日：2010-07-05

申请人： Atotech Deutschland GmbH

发明人： HOFMANN, Udo ,  DONSBACH, Hermann ,  UNGER, Jörg ,  KRENZEL, Volker

IPC分类号： C23C22/17 ,  C23C22/83 ,  C23C18/12

CPC分类号： C23C22/17 ,  C23C22/83 ,  C23C2222/10

公开(公告)号：EP2449149A1

公开(公告)日：2012-05-09

申请号：EP10728680.9

申请日：2010-07-05

申请人： ATOTECH Deutschland GmbH

发明人： HOFMANN, Udo ,  DONSBACH, Hermann ,  UNGER, Jörg ,  KRENZEL, Volker

IPC分类号： C23C22/17 ,  C23C22/83 ,  C23C18/12

CPC分类号： C23C22/17 ,  C23C22/83 ,  C23C2222/10

摘要： The invention relates to a method for producing an anti-corrosive cover layer, a surface to be treated being brought into contact with an aqueous treatment solution containing chromium(III) ions and at least one phosphate compound and an organosol. The method improves the anti-corrosion protection of metal, in particular zinc-containing, surfaces and zinc-containing surfaces provided with conversion layers. This produces or improves the decorative and functional properties of the surfaces. In addition, it avoids the known problems arising with the use of chromium(VI)-containing compounds or multi-stage processes in which a chromium ion-containing passivation layer and a seal are applied consecutively.