| 摘要 |
The invention relates to a method for coating metallic surfaces with a silane/silanol/siloxane/polysiloxane-containing mixture, whereby the composition comprises a) at least one compound selected from silanes, silanols, siloxanes and polysiloxanes, b) at least one titanium-, hafnium-, zirconium-, aluminium- or/and boron-containing compound, c) at least one type of cation selected from cations of metals of the 1st to 3rd and 5th to 8th sub-groups, including lanthanides and the second main group of the periodic table of the elements, or/and at least one corresponding compound, a substance d), selected from d1) silicon-free compounds with at least one amino, urea or/and ureido group, d2) nitrite anions or/and compounds with at least one nitro group, d3) compounds based on peroxide, d4) phosphorus-containing compounds, anions of at least one phosphate or/and anions of at least one phosphonate and e) water and f) optionally at least one organic solvent. The invention further relates to corresponding aqueous compositions.
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