高强合金与钛合金的电偶腐蚀行为

采用电偶腐蚀实验方法、扫描电镜和能谱方法等研究了高强合金与钛合金异接电偶腐蚀行为.从不同材料、不同成分对电偶腐蚀的影响,研究了电偶腐蚀的规律及电偶对偶接的可能性.同时比较了铝合金和高强度钢与钛合金电偶腐蚀行为的差异,探讨了自腐蚀电位差与电偶电流密度的关系.实验表明,铝合金LY12、铝合金LC4、高强度钢30CrMnSiA均不能与TC2钛合金偶接,高强度钢1Cr17Ni2则可以与TC2偶接,且电偶电流密度随自腐蚀电位差增大而增大. 

Galvanic Corrosion Behavior between Titanium Alloy and High-Strength Alloys

Galvanic corrosion between titanium alloy TC2 and two aluminum alloys (LY12,LC4) and two high strength steels (30CrMnSiA,1Cr17Ni2) were investigated by galvanic corrosion testing,SEM and DES. The difference of galvanic corrosion behavior of two aluminum alloys and of galvanic corrosion behavior of two high strength steels were analyzed. On the above basis,the rule of galvanic corrosion between titanium alloy and high strength alloys was studied. By comparing the galvanic corrosion behavior of aluminum alloys with that of high strength steels,the relationship between differential value of open circuit potentials and the value of galvanic corrosion current density was discussed. It was concluded that the galvanic couple of 1Cr17Ni2 TC2 can be available, but the galvanic couples of LY12 TC2,LC4 TC2 and 30CrMnSiA TC2 should be avoided.