采用扫描电镜、透射电镜、动电位极化和浸泡实验研究了热处理对汽车散热器翅片材料在0.6 mol/L(pH 6)溶液中的腐蚀的影响.热处理模拟了控制气体的焊接方法.结果表明热处理对尺寸大于1μm的合金相没有影响,但增加了尺寸小于1μm的合金相的数目.同时降低了翅片材料的阳极活性且提高了其阴极活性.阴极活性的提高归因于阴极合金相数目的增多.阳极活性的降低可能是与富Si的合金相溶解在基体里并降低基体的阳极活性有关. The effects of heat treatment on the corrosion of automobile radiator fin materials in 0.6 mol / L (pH 6) solution were investigated by scanning electron microscopy, transmission electron microscopy, potentiodynamic polarization and immersion experiments.The results of the welding Indicating that heat treatment had no effect on alloy phases larger than 1 μm in size but increased the number of alloy phases less than 1 μm in size while reducing the anode activity and the cathode activity of the fin material.The improvement of cathode activity was attributed to the increase of cathode alloy phase The increase in the number of anode activity may be reduced with the Si-rich alloy dissolved in the matrix and reduce the anode activity of the substrate.