发明名称 |
Kurzzeit-Heißverdichtung anodisierter Metalloberflächen mit tensidhaltigen Lösungen |
摘要 |
Described is a method of sealing anodized metal surfaces, the method being characterized in that the anodized metal is brought in contact, for a length of time between 0.5 and 2 minutes per micrometre of anodized-layer thickness, with an aqueous solution having a temperature between 75 DEG C and the boiling point and a pH in the range 5.5 to 8.5 and containing: a) a total of 0.0004 to 0.05 g/l of one or more cationic, anionic or non-ionic surfactants; and b) a total of 0.0005 to 0.5 g/l of one or more organic acids selected from the group comprising the cyclic polycarboxylic acids with 3 to 6 carboxyl groups and the phosphonic acids. The preferred surfactants are non-ionic surfactants and the preferred acids are polyphosphinocarboxylic acids. Optionally present are alkali-metal and/or alkaline-earth metal cations, preferably Li and/or Mg ions, in amounts of 0.0001 to 5 g/l.
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申请公布号 |
DE19621818(A1) |
申请公布日期 |
1997.12.04 |
申请号 |
DE19961021818 |
申请日期 |
1996.05.31 |
申请人 |
HENKEL KGAA, 40589 DUESSELDORF, DE |
发明人 |
KOERNER, THORSTEN, DR., 40229 DUESSELDORF, DE;KRESSE, JOSEF, DR., 41505 ROMMERSKIRCHEN, DE |
分类号 |
C25D11/18;C25D11/24;(IPC1-7):C25D11/18 |
主分类号 |
C25D11/18 |
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