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Corrosion protection of steel strips coated with zinc or zinc alloy
Corrosion protection of steel strips coated with zinc or zinc alloy
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机译:镀锌或锌合金的钢带的腐蚀防护
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摘要
A process for the corrosion protection of steel strips coated with zinc or zinc alloy, characterised in that the steel strips coated with zinc or zinc alloy are brought into contact with an aqueous treatment solution having a pH within the range of from 1.5 to 3.5, which contains 1 to 20 g/l manganese(II) ions and 1 to 150 g/l phosphate ions, and the solution is dried without intermediate rinsing. Optionally the solution may contain in addition: up to 10 g/l zinc ions, up to 10 g/l nickel ions, up to 20 g/l titanium ions, up to 50 g/l silicon ions in the form of silicon compounds, up to 30 g/l fluoride ions, up to 150 g/l of one or more polymers or copolymers of polymerisable carboxylic acids selected from acrylic acid, methacrylic acid and maleic acid, and esters thereof with alcohols having 1 to 6 carbon atoms. The present invention also relates to the correspondingly-treated metal strips.
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机译:一种涂有锌或锌合金的钢带的腐蚀保护方法,其特征在于,使涂有锌或锌合金的钢带与pH在1.5至3.5范围内的含水处理溶液接触。包含1至20 g / l的锰(II)离子和1至150 g / l的磷酸根离子,无需干燥即可干燥溶液。可选地,溶液还可以包含:最多10 g / l的锌离子,最多10 g / l的镍离子,最多20 g / l的钛离子,最多50 g / l的硅化合物形式的硅离子,最多30 g / l的氟离子,最多150 g / l的一种或多种选自丙烯酸,甲基丙烯酸和马来酸的可聚合羧酸的聚合物或共聚物,及其与具有1-6个碳原子的醇的酯。本发明还涉及相应处理的金属带。
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