通过正交试验研究了热处理及化学处理对冷轧NiTi 合金耐蚀性的影响.结果表明，酸洗及硝酸钝化能够明显提高NiTi合金在1％NaCl溶液中的击 穿电位；退火处理能够降低NiTi合金的自腐蚀电位及自腐蚀电流.约400℃退火的NiTi合金试 样的耐蚀性最好，较冷轧态自腐蚀电流降低近一个数量级.水煮处理略降低NiTi合金的自腐 蚀电位与自腐蚀电流，一定程度上提高其耐蚀性.
The effects of heat - and chemical - treatments o n corrosion characteristics of a NiTi alloy in 1% NaCI saline solution are studi ed by orthogonal method.The results show that the break through potential may be increased by pickling and passivation.Annealing decreases the free corrosion p otential and current density markedly.Decocting processing seems have no effect on the break through and repassivation potential,but slightly reduces the fre e corrosion potential and current density.
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