Chromium-free corrosion preventive and corrosion prevention method
AssigneeHenkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
InventorsMatthias Koch, Kerstin Motzkat, Karsten Hackbarth, Joerg Sander
Life of this patent
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Abstract
A chromium-free corrosion inhibitor containing at least one titanium, silicon and/or zirconium compound corresponding to general formula (I): in which Me is a titanium, silicon or zirconium ion, at least one other olefinically unsaturated comonomer containing at least two olefinically unsaturated double bonds per molecule, optionally other comonomers containing one olefinically unsaturated double bond per molecule, and at least one radical and/or cationic polymerization initiator that is activated by radiation.
Claims10
A chromium-free process for inhibiting corrosion of substrates comprising steel, the process comprising the steps of:
- a) contacting a clean, untreated surface comprising steel with a corrosion inhibitor composition for 0.5 to 60 seconds at a treatment temperature of 10° C. to 50° C., said corrosion inhibitor comprising:
- i) one or more compounds of formula (I):
- (CR1R2═CR3—COO—)n—Me—(O—X)4-n (I)
- in which
- R1 and R2 represent H, C1-12 alkyl, aralkyl, or the group —CO—O—Y,
- R3 is H or C1-12 alkyl,
- Me is a titanium, silicon, or zirconium ion,
- X is H, C1-12 alkyl, aryl, aralkyl, alkoxyl, aroxyl, sulfonyl, phosphate, or pyrophosphate,
- Y is H, C1-12 alkyl, or Me, and
- n=0 to 4;
- ii) at least one olefinically unsaturated co-monomer containing at least two olefinically unsaturated double bonds per molecule;
- iii) optionally, one or more other co-monomers containing one olefinically unsaturated double bond per molecule;
- and
- iv) one or more radical or cationic polymerization initiators, or any combination thereof, wherein at least one initiator is activatable by radiation;
- b) removing excess corrosion inhibitor, if any, from the substrate;
- and
- c) applying a suitable supply of energy for 0.1 to 120 seconds to the corrosion inhibitor to polymerize the monomers and form a polymeric film on the substrate, said polymeric film having a weight per unit area of 0.1 to 10 g/m2.
A chromium-free process for inhibiting corrosion of substrates comprising steel, the process comprising the steps of:
- a) applying a corrosion inhibitor composition directly to a clean, unphosphated steel surface for 0.5 to 60 seconds at a treatment temperature of 10° C. to 50° C., said corrosion inhibitor comprising:
- i) one or more compounds of formula (I):
- (CR1R2═CR3—COO—)n—Me—(O—X)4-n (I)
- in which
- R1 and R2 represent H, C1-12 alkyl, aralkyl, or the group —CO—O—Y,
- R3 is H or C1-12 alkyl,
- Me is a titanium, silicon, or zirconium ion,
- X is H, C1-12 alkyl, aryl, aralkyl, alkoxyl, aroxyl, sulfonyl, phosphate, or pyrophosphate,
- Y is H, C1-12 alkyl, or Me, and
- n=0 to 4;
- ii) at least one olefinically unsaturated co-monomer containing at least two olefinically unsaturated double bonds per molecule;
- iii) optionally, one or more other co-monomers containing one olefinically unsaturated double bond per molecule;
- and
- iv) one or more radical or cationic polymerization initiators, or any combination thereof, wherein at least one initiator is activatable by radiation;
- b) removing excess corrosion inhibitor, if any, from the unphosphated steel surface;
- and
- c) applying a suitable supply of energy for 0.1 to 120 seconds to the corrosion inhibitor to polymerize the monomers and form a corrosion inhibiting film on the unphosphated steel surface, said corrosion inhibiting film having a weight per unit area of 0.1 to 10 g/m2.
A chromium-free process for inhibiting corrosion of substrates comprising steel, the process comprising the steps of:
- a) applying a corrosion inhibitor composition directly to a clean, unphosphated metal surface, said surface being aluminum, alloys of aluminum or steel, said steel optionally provided with a metallic coating of zinc, aluminum, copper or nickel, or any combination thereof, for 0.5 to 60 seconds at a treatment temperature of 10° C. to 50° C., said corrosion inhibitor comprising:
- i) one or more compounds of formula (I):
- (CR1R2═CR3—COO—)n—Me—(O—X)4-n (I)
- in which
- R1 and R2 represent H, C1-12 alkyl, aralkyl, or the group —CO—O—Y,
- R3 is H or C1-12 alkyl,
- Me is a titanium, silicon, or zirconium ion,
- X is H, C1-12 alkyl, aryl, aralkyl, alkoxyl, aroxyl, sulfonyl, phosphate, or pyrophosphate,
- Y is H, C1-12 alkyl, or Me, and
- n=0 to 4;
- ii) at least one olefinically unsaturated co-monomer containing at least two olefinically unsaturated double bonds per molecule;
- iii) optionally, one or more other comonomers containing one olefinically unsaturated double bond per molecule;
- and
- iv) one or more radical or cationic polymerization initiators, or any combination thereof, wherein at least one initiator is activatable by radiation;
- b) removing excess corrosion inhibitor, if any, from the unphosphated steel surface;
- and
- c) applying a suitable supply of energy for 0.1 to 120 seconds to the corrosion inhibitor to polymerize the monomers and form a corrosion inhibiting film on the unphosphated steel surface, said corrosion inhibiting film having a weight per unit area of 0.1 to 10 g/m2.
Dependencies are inferred from the claim text.