Ni—Ti—Nb基形状记忆合金的耐蚀性能

Corrosion Resistance of the Ni-Ti-Nb Based Shape Memory Alloys

摘要:

利用磁悬浮水冷铜坩埚冶炼四元Ｎｉ－Ｔｉ－Ｎｂ基形状记忆合金，对板材试样模拟其典型的介质－人体组织液和人工海水，运用ＭＪｏｎｔａｋｌｏ ｍｏｄｅ测定阳极极化曲线，并对该体系合金纯化膜进行了耐蚀行为评价。结果表明：Ｎｉ－Ｔｉ－Ｎｂ基形状记忆合金具有良好遥耐蚀性。合金化元素Ｚｒ提高其耐蚀性，Ｃｒ降低其耐蚀性，而Ｖ对该行为影响不大。

Abstract:

Some ternary Ni Ti Nb based shape memory alloys have been prepared in the water cooled crucible of a magnetic suspension furnace under a controlled protective argon atmosphere. Anodic polarization curves of the Ni Ti Nb based shape memory alloys were measured utilizing the Montaklo Mode. The stability of the passive film was investigated in both artificial sea water (3 5%NaCl) and physiological solution (5%NaCl+0.1%H 2O 2) environments. The results show that the corrosion resistance of these alloys is excellent.