By analyzing the surfaces of 4J36 and LF21 workpieces before and after cleaning by means of SEM and EDX, it is shown that the cathode cleaning action can effectively clear away the oxide films and improve the spreading conditions of the filler metals.

• 采用SEM和EDX对净化前后4J36和LF21工件进行表面分析,表明阴极净化作用可有效地清除氧化膜并改善钎料的铺展条件。