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    • 1. 发明授权
    • Process for coating metallic surfaces
    • 金属表面涂层工艺
    • US08349092B2
    • 2013-01-08
    • US13080974
    • 2011-04-06
    • Jürgen SpechtPeter SchubachRüdiger ReinPeter Claude
    • Jürgen SpechtPeter SchubachRüdiger ReinPeter Claude
    • C23C22/12C23C22/07
    • C23C22/365C23C22/362
    • A method for treating or pre-treating parts, profiled-pieces, strips, sheet metals or wires having metallic surfaces, in which at least 5% of these surfaces consists of aluminum or of at least one aluminum alloy with an acid aqueous solution which contains fluoride, zinc and phosphate and which has the following dissolved contents in the phosphatizing solution: sodium virtually none, from 0.04 to less than 2 g/L; potassium virtually none or in a concentration ranging from 0.025 to 2.5 g/L; sodium and potassium in a concentration ranging from 0.025 to 2.5 g/L as sodium, whereby the potassium content is converted to sodium on a molar basis; zinc 0.2 to 4 g/L zinc, 5 to 65 g/L calculated as PO4; 0.03 to 0.5 g/L phosphate free fluoride wherein the total fluoride is present in a concentration ranging from 0.1 to 5 g/L. A zinc-containing phosphate layer is thereby deposited onto the metallic surfaces with a layer weight ranging from 0.5 to 10 g/m2.
    • 用于处理或预处理部件,异形件,条带,金属片或具有金属表面的金属线的方法,其中至少5%的这些表面由铝或至少一种铝合金与酸性水溶液组成,所述酸性水溶液含有 氟化物,锌和磷酸盐,并且在磷酸盐化溶液中具有以下溶解含量:钠实际上不为0.04至小于2g / L; 实际上无钾或浓度范围为0.025至2.5g / L的钾; 钠和钾的浓度范围为0.025至2.5g / L,钠的含量以摩尔计转换为钠; 锌0.2〜4g / L锌,5〜65g / L PO4计算; 0.03至0.5g / L磷酸盐氟化物,其中总氟化物以0.1至5g / L的浓度存在。 因此,含锌磷酸盐层以0.5〜10g / m 2的重量沉积在金属表面上。