电解法分离Cu-Al钎焊接头的研究

Separation of copper-aluminum brazed joints by electrolysis

文中从再制造基本思想出发,对Cu-Al钎焊接头分离方法进行了研究。采用电解法对Cu-Al钎焊接头进行了分离。研究结果表明,随电极电压升高,电解分离时间减少,接头的质量损失也减少。但电极电压过高,易出现发热过大、烧断导线的现象。较理想的电解分离参数为:电解液为PH=1.5的15%NaCl溶液时,电极电压为0.8 V,电流为31.0 A或电极电压为0.9 v。电流为37.1 A。试验中采用等离子发射光谱仪测定电解分离后电解液中Al^(3+)浓度,并通过计算得出溶液中Al^(3+)质量与电解分离过程中损失的质量有较好的对应关系,从而证明了电解分离过程中Cu-Al接头损失的质量主要来自于阳极铝一侧的损失。

Based on the basic idea of remanufacturing,the separation methods of copper-aluminum brazed joints were studied. The electrolysis was used to separate copper-aluminum brazed joints. Research results showed that with the electrode voltage rising, electrolysis separation time reduces and joint quality loss also decreases at the same time. However, high voltage electrodes easily caused excessive heat and burn-out the copper wires. The proper parameters for electrical separation are the electrode voltages of 0.8 V and current of 31.0 A or electrode voltages of 0.9 V and current of 37.1 A in the15% NaCl solution (PH=1.5) as electrolyte circumstances. The concentration of Al^(3+) in electrolytic electrolyte after the separation was tested by IRIS Advantage ER/S sequential plasma emission spectrometer, and the quality of Al^(3+) in solution has a good corresponding relationship with the quality of Al3 + lost in the process of electrolysis separation, which proved that the quality loss of copper-aluminum brazed joints in process of electrolysis separation mainly comes from aluminum side as the anodes.