公开(公告)号：EP1570099A4

公开(公告)日：2012-08-29

申请号：EP03796627

申请日：2003-12-04

申请人： HENKEL AG & CO KGAA

发明人： MEAGHER KEVIN K ,  PRESCOTT THOMAS J ,  KELLY TIMM L

IPC分类号： B32B15/04 ,  C04B9/02 ,  C09K3/00 ,  C23C20060101 ,  C23C2/00 ,  C23C22/07 ,  C23C22/36 ,  C23C22/48

CPC分类号： C23C22/361 ,  C23C22/34 ,  C23C22/83

摘要： A chemically and thermally stable chromate free aqueous liquid treatment for metals, especially aluminum, that imparts corrosion resistance as good as that from conventional chromate containing treatments, contains water and a fluoroacid selected from the group consisting of H 2 TiF 6 , H 2 ZrF 6 , H 2 HfF 6 , H 2 SiF 6 , H 2 GeF 6 , H 2 SnF 6 , HBF 4 , and mixtures thereof; a water soluble organic carboxylic acid that contains at least two hydroxyl groups, exclusive of the hydroxyl groups that are part of any carboxyl groups, per carboxyl group in each acid molecule, the water soluble salts of such acids, and mixtures thereof; a source of phosphate ions; and an organic component selected from the group consisting of tannins and amino-phenolic polymers.

公开(公告)号：EP1701806A4

公开(公告)日：2008-09-24

申请号：EP03819278

申请日：2003-12-18

申请人： HENKEL AG & CO KGAA

发明人： MEAGHER KEVIN K ,  KELLY TIMM L

IPC分类号： H01M8/02 ,  B05D1/02 ,  B05D1/18 ,  B05D1/36 ,  B05D3/10 ,  B05D5/12 ,  C23G1/08 ,  C23G1/18 ,  C23G3/02 ,  C25F1/04 ,  C25F1/06

CPC分类号： H01M8/0228 ,  C23G1/00 ,  C23G1/08 ,  C23G1/081 ,  C23G1/086 ,  C23G1/18 ,  C23G3/02 ,  C23G3/021 ,  C23G3/023 ,  C23G3/024 ,  C23G3/027 ,  C25F1/04 ,  C25F1/06 ,  H01M8/0206 ,  H01M8/0221

摘要： Methods for deoxidizing metallic surfaces are disclosed. Such a method may include contacting a surface of a metal strip (102) with one or more chemical solutions until a potential drop across a thickness of the metal strip (102) is less than a pre-selected value. To process a metal strip (102) such that it may be suitable for fabrication of a bipolar plate for use in a fuel cell, the metal strip (102) may be processed until the potential drop is less than about 15 mV. A surface of the metal strip (102) may be contacted for a first period of time with a first chemical solution having a pH of between 10 and 14. Thereafter, the surface may be contacted for a second period of time with a second chemical solution having a pH of between 1 and 3. A conductive organic coating may then be applied to the surface. Such methods are particularly suitable for use in connection with a coil coating process.