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不锈钢在一定温度范围内经热处理敏化，在晶界附近形成贫铬区，引起晶间腐蚀．本文采用恒电位脉冲技术对奥氏体不锈钢的敏化进行检测，并讨论了该法检测敏化的最佳实验条件．与常用的双环ＥＰＲ法相比较，恒电位脉冲法具有测定速度快、对试样损伤小、测定结果更准确等特点．根据扫描电子显微镜（ＳＥＭ）的观察，敏化度较高的不锈钢电极，经过双环ＥＰＲ实验后在电极表面发生较严重的孔蚀，这可能就是导致ＥＰＲ法测定常会出现偏差的原因；而经恒电位脉冲法实验后的同类电极，则未发现明显的孔蚀现象，从而保证了检测方法的准确性．
Stainless steel in a certain temperature range sensitized by heat treatment, the formation of chromium-depleted region near the grain boundary, causing intergranular corrosion. In this paper, constant potential pulse technique was used to test the sensitization of austenitic stainless steel. The optimum conditions for the sensitization of this method were discussed. Compared with the commonly used double-ring EPR method, the constant potential pulse method has the advantages of fast determination, less damage to the sample and more accurate determination results. According to the observation by scanning electron microscope (SEM), the higher sensitivity of the stainless steel electrode through the double-ring EPR experiment occurred in the electrode surface more serious pitting corrosion, which may be caused by the EPR method often appear the reason for the deviation; the constant Potential pulse method after the same type of electrode, then no obvious pitting phenomenon, thus ensuring the accuracy of detection methods.