Tinning solution used for copper clad steel conductor

The invention discloses a tinning solution used for a copper clad steel conductor. The tinning solution comprises tin, indium, bismuth and an antioxidant, the weight ratio of the tin to the indium tothe bismuth to the antioxidant is 100:1:1:1. The tinning solution is reasonable in formula, the indium can improve the weldability, the bismuth can improve the luminance, the copper clad steel conductor prepared through the tinning solution has the good weldability and brightness, and the weldability and brightness are still good after long-time storage in air. 本发明公开了种用于铜包钢线的镀锡溶液，该镀锡溶液包括锡、铟、铋和抗氧化剂，所述的锡、铟、铋和抗氧化剂之间的重量比为100：1：1：1。本发明的配方合理，铟能够提高可焊性，铋能够提高光亮度，使用该镀锡溶液制备的铜包钢线具有良好的可焊性、光亮性，在空气中存放较长的时间后，可焊性和光亮性仍然较好。