添加元素对Ti－Ta合金耐蚀性的影响

The Effect of Adding Elements on Corrosion Resistance of Ti-Ta Alloy

采用失重法和电化学测试研究了Ａｌ、Ｍｏ、Ｚｒ合金添加元素对Ｔｉ－Ｔａ合金在高温浓ＨＮＯ３溶液中耐蚀性的影响以及溶液中Ｒｕ３＋的作用。结果表明：在Ｔｉ－Ｔａ合金中加入Ａｌ、Ｍｏ元素，则降低合金的耐蚀性能；添加Ｚｒ，合金的抗腐蚀性能有所提高；溶液中的Ｒｕ３＋可以加速所研合金的钝化，提高合金的抗蚀能力。电化学测试结果与腐蚀试验完全一致。

The influnces of adding AL Mo and Zr elements on corrosion resistance of Ti-Ta alloy in boiling 40% nitric acid solution, and the effect of Ru3+adding into the solution on the alloys have been researched by immersion tests and electrochemistry method.The results show that the corrosion resistances of the alloys are reduced slightly after adding Al and Mo elements in Ti-Ta alloy,and the corrosion resistance is increased by adding Zr.The passivations of all researched alloys are promoted by R3+in solution,and the corrosion resistances of the alloys are increased.The results of elechro-chemical means agree completely with corrosion test.