The invention relates to a process for coating metallic surfaces with a composition containing silane/silanol/siloxane/polysiloxane, wherein, in addition to a) at least one compound selected from silanes, silanols, siloxanes and polysiloxanes,b) at least one compound containing titanium, hafnium, zi
The invention relates to a process for coating metallic surfaces with a composition containing silane/silanol/siloxane/polysiloxane, wherein, in addition to a) at least one compound selected from silanes, silanols, siloxanes and polysiloxanes,b) at least one compound containing titanium, hafnium, zirconium, aluminum and/or boron, andc) at least one type of cation selected from cations of metals of subgroups 1 to 3 and 5 to 8, including lanthanides, and of main group 2 of the periodic table of the elements, and/or at least one corresponding compound, the composition contains at least one substance d) selected from: d1) silicon-free compounds having at least one amino, urea and/or ureido group in each case,d2) anions of nitrite and/or compounds having at least one nitro group,d3) compounds based on peroxide, andd4) phosphorus-containing compounds, anions of at least one phosphate and/or anions of at least one phosphonate, as well ase) water, andf) optionally also at least one organic solvent. The invention further relates to corresponding aqueous compositions.
대표청구항▼
1. An aqueous composition consisting of a) at least one compound selected from the group consisting of a silane, a silanol, a siloxane and a polysiloxane, wherein the content of silane/silanol/siloxane/polysiloxane in the composition ranges from 0.02 to 1 g/L, calculated on the basis of the correspo
1. An aqueous composition consisting of a) at least one compound selected from the group consisting of a silane, a silanol, a siloxane and a polysiloxane, wherein the content of silane/silanol/siloxane/polysiloxane in the composition ranges from 0.02 to 1 g/L, calculated on the basis of the corresponding silanols;b) at least one compound b) containing at least one of titanium, hafnium, zirconium, aluminum or boron, at least one of which compounds is a complex fluoride, wherein the content of compound b) in the composition ranges from 0.1 to 15 g/L, calculated as the sum of the corresponding metals;c) at least one cation selected from cation of metals of subgroups 1 to 3 and 5 to 8, including lanthanides, and of main group 2 of the periodic table of the elements, or at least one corresponding compound c), wherein the content of cations or corresponding compound c) ranges from 0.01 to 6 g/L;at least one substance d) selected from the group consisting ofd1) a silicon-free compound having at least one of an amino, an urea or an ureido group;d2) an anion of nitrite or a compound having at least one nitro group,d3) a peroxide compound; andd4) at least one of a phosphorus-containing compound, an anion of at least one phosphate or an anion of at least one phosphonate; ande) water.
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