Treatment solution for preparing aluminum alloy surface amorphous composite passivation film, preparation method and application

制备铝合金表面非晶态复合钝化膜的处理液及制法和应用

Abstract

本发明公开了制备铝合金表面非晶态复合钝化膜的处理液及制法和应用。本发明处理液的配方包括:含缓蚀阴离子稀土盐:5~15g·L-1、催化剂型复氧化剂3~10g·L-1、辅助氧化剂:1~3g·L-1、缓冲型成膜促进剂:0.1~0.5g·L-1、复合稳定剂:0.5~1.5g·L-1。处理液不含任何有毒铬及有机物,转化处理无需加热,处理时间为2min-5min,可在铝合金表面制备出性能优异的金黄色非晶态“稀土-锰”复合钝化膜。很好地解决了目前六价铬处理所带来的环境污染和对人体的危害,且可克服钛锆系转化膜无色,无法实现现场判断缺陷。本发明工艺简单,操作简便,成本低廉,易于实现产业化。
The invention discloses treatment solution for preparing an aluminum alloy surface amorphous composite passivation film, a preparation method and application. A formula of the treatment solution comprises 5 to 15g/L of corrosion inhibiting negative ion-containing rare earth salt, 3 to 10g/L of catalyst type composite oxidant, 1 to 3g/L of auxiliary oxidant, 0.1 to 0.5g/L of buffering film-forming accelerator and 0.5 to 1.5g/L of composite stabilizer. The treatment solution does not contain any toxic chromium or organic substances, does not need heating during conversion treatment of 2 to 5 minutes, and can prepare the golden amorphous 'rare earth-manganese' composite passivation film with excellent performance on the aluminum alloy surface. The treatment solution well solves environmental pollution and human harm caused by the present hexavalent chromium treatment, and can overcome the defects that a zirconium titanate series conversion film is colorless and field judgment cannot be realized. The preparation method has the advantages of simple process, simple and convenient operation and low cost, and is easy to realize industrialization.

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Patent Citations (2)

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    CN-102433559-BSeptember 04, 2013宁波科苑鑫泰表面处理新技术有限公司一种含稀土铈的金属处理液及其生产方法
    CN-102808170-ADecember 05, 2012天津大学Treating fluid for corrosion-resistant rare earth conversion film on surface of aluminum alloy, and application method thereof
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