| 摘要 |
Treating the surface of a metallic substrate made of aluminum or its alloy comprises: providing a mixture with a sol comprising alkoxysilanes (I) and organoalkoxysilanes (II); applying the mixture to the surface of the metallic substrate; and at least area-wise curing the mixture to form a sol-gel coating connected to the metal substrate. Treating the surface of a metallic substrate made of aluminum or its alloy comprises: providing a mixture of a sol comprising alkoxysilanes of formula (Si(OR) 4) (I) and organoalkoxysilanes of formula (R2Si(OR1) 3) (II); applying the mixture to the surface of the metallic substrate; and at least area-wise curing the mixture to form a sol-gel coating connected to the metal substrate. R, R1 : short-chain hydrocarbon moieties having at least one hydroxy; and R2 : organic group having glycidoxy, mercapto, amino, methacryl, allyl and/or vinyl. An independent claim is also included for the metallic substrate, preferably metal sheet, made of aluminum or its aluminum alloy with a sol-gel coating, formed by the above method. |
