| 摘要 |
The present invention relates to an aqueous composition for pretreating a metallic surface before further coating or for treating said surface. The aqueous composition is obtained by adding a) at least [one] sodium, potassium, and/or ammonium water glass and b) at least one silane to water. The quantity ratio of a) to b), in each case including the resulting reaction products, is preferably in the range of 0.1:1 to 2:1.
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