两种药芯钎料钎焊的接头形成的钎料钎缝层腐蚀电位值都处于两种母材之间，而钢腐蚀电位最小，所以在钎焊形成的接头中钢耐腐蚀性最差，BAg25TS钎料耐腐蚀性优于BAg30T钎料，铜母材耐腐蚀性最好，这也再次印证在拉伸实验中BAg25TS药芯钎料钎焊的接头拉伸强度受盐雾试验时间影响小于BAg30T。BAg30T药芯钎料钎焊界面处钎料中的Cu、Zn元素较BA25TS钎料中的Cu、Zn元素与基体Fe扩散更为充分，再次说明两种药芯钎料钎焊接头均发生了良好的冶金结合。

The corrosion potential value of the brazing seam layer formed by the two kinds of flux-cored solder brazing joints is between the two base materials, and the corrosion potential of steel is the smallest, so the corrosion resistance of steel is the worst in the joints formed by brazing. The corrosion resistance of BAg25TS solder is better than that of BAg30T solder, and the copper base material has the best corrosion resistance. This again proves that the tensile strength of the joints brazed with BAg25TS flux-cored solder in the tensile test is less than that of BAg30T due to the salt spray test time. . The Cu and Zn elements in the brazing interface of BAg30T flux-cored brazing filler metal diffuse more fully than the Cu and Zn elements in the BA25TS brazing filler metal and the matrix Fe. Once again, it shows that the brazing joints of the two flux-cored brazing filler metals have performed well. The metallurgical combination.