| 摘要 |
PCT No. PCT/EP96/02848 Sec. 371 Date Jan. 7, 1998 Sec. 102(e) Date Jan. 7, 1998 PCT Filed Jun. 29, 1996 PCT Pub. No. WO97/03232 PCT Pub. Date Jan. 30, 1997A process for sealing anodized metals without using any heavy metals comprises a first step in which the anodized metal is contacted for a period of between 3 and 30 minutes (for an anodized layer thickness of 20 mu m) with an aqueous solution which has a temperature from 15 DEG to 35 DEG C. and a pH between 5.0 and 6.5 and contains from 0.1 to 3 g/l of lithium ions and from 0.1 to 5 g/l of fluoride ions and a second step in which the anodized metal is contacted for a period from 5 to 30 minutes (for an anodized layer thickness of 20 mu m) with water or an aqueous solution of substances which prevent the formation of a sealing coating, the solution having a pH from 5.5 to 8.5 and a temperature from 80 DEG to 100 DEG C. |
