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    • 9. 发明授权
    • Process for a passivating postrinsing of conversion layers
    • 转化层的钝化方法
    • US5294266A
    • 1994-03-15
    • US978193
    • 1992-11-18
    • Dieter HauffeThomas KolbergGerhard MullerHorst GehmeckerWerner RauschPeter SchubachThomas Wendel
    • Dieter HauffeThomas KolbergGerhard MullerHorst GehmeckerWerner RauschPeter SchubachThomas Wendel
    • C23C22/34C23C22/36C23C22/60C23C22/83
    • C23C22/73C23C22/34C23C22/361C23C22/60C23C22/83
    • The invention is in a composition and process for the chromium free passivating postrinsing of conversion layers on metals before the application of a paint or adhesive. The conversion layers can be on the bases of phosphate layers, at least two polyvalent metal ions with complex formers, titanium, zirconium and/or hafnium. The postrinsing agent is an aqueous solution which has been adjusted to a pH value of up to 5 and which contains an aluminum fluorozirconate having an Al:Zr:F mole ratio of (0.15 to 8.0):1:(5 to 52), and in which solutions the total concentration of Al+Zr+F is 0.1 to 8.0 g/l. The postrinsing solutions may additionally contain at least one of the anions benzoate, caprylate, ethyl hexoate, salicylate in a total concentration of 0.05 to 0.5 g/1 and may preferably be adjusted to the required pH value with cations of volatile bases, such as ammonium, ethanolammonium and di- and triethanolammonium. The paint is subsequently applied suitably by cathodic electrocoating or powder coating or from a low-solvent high-solids paint.The rinsing treatment is over a period of 1 to 120 seconds at temperatures of 20.degree. to 80.degree. C. The invention is used as a pretreatment to the application of a paint coating, film coating or adhesive coating.
    • 本发明是用于在施加涂料或粘合剂之前的金属上的转化层的无铬钝化的组合物和方法。 转化层可以在磷酸盐层,至少两种具有复合成型剂的多价金属离子,钛,锆和/或铪的基础上。 postrinsing剂是一种水溶液,其pH值调至5以下,并含有Al:Zr:F摩尔比为(0.15〜8.0):1:(5〜52)的氟锆酸铝, 其中Al + Zr + F的总浓度为0.1〜8.0g / l。 postrinsing溶液还可以含有至少一种阴离子苯甲酸酯,辛酸酯,己酸乙酯,水杨酸酯,总浓度为0.05至0.5g / l,并​​且可优选用挥发性碱如铵的阳离子调节至所需的pH值 ,乙醇铵和二乙醇胺和三乙醇铵。 随后通过阴极电涂或粉末涂料或低溶剂高固体涂料适当地施涂涂料。 在20〜80℃的温度下,漂洗处理时间为1〜120秒。本发明用作涂料涂料,薄膜包衣或粘合剂涂料的预处理。