Chromium-free passivation solution

一种无铬钝化液

Abstract

本发明公开了一种无铬钝化液,其pH值为1-5,其原料组成为稀土盐、无机盐、硼酸、硝酸和水;无铬钝化液中:稀土盐含量为1-15g/L,无机盐含量为3-30g/L,硼酸含量为0.1-3g/L,硝酸含量为3-30ml/L;所述稀土盐为钒酸盐和铈盐的混合物,钒酸盐和铈盐的重量比为1∶1.33-6.5;所述无机盐为氯化钠或氯化钾。该无铬钝化液钝化效果好,使用成本低和生产效率高,性能稳定不易变质,贮存时间久。
The invention discloses a chromium-free passivation solution, which has the pH value 1-5 and consists of rare-earth salt, inorganic salt, boric acid, nitric acid and water serving as raw materials. In the chromium-free passivation solution, the content of the rare earth salt is 1-15 g/L, the content of the inorganic salt is 3-30 g/L, the content of the boric acid is 0.1-3 g/L, and the content of the nitric acid is 3-30 ml/L; the rare earth salt is a mixture of vanadate and cerium slat in the weight ratio 1:(1.33-6.5); and the inorganic salt is sodium chloride or potassium chloride. The chromium-free passivation solution has the advantages of good passivation effect, low application cost, high production efficiency, stable performance, difficulty in deteriorating and long storage time.

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Cited By (2)

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    CN-102965654-AMarch 13, 2013况金权一种高耐盐雾的铝材钝化剂及其制备方法
    CN-102965654-BNovember 19, 2014况金权, 惠州市宏亚金属处理有限公司, 博罗县东明化工有限公司High-salt-fog-resistance aluminum product passivator and preparation method thereof