采用动电位扫描技术测量304不锈钢在3.5%NaCl溶液中不同电位扫描速率下的极化曲线,用电子散斑干涉技术(ESPI)结合动电位扫描测量304不锈钢在不同浓度、温度和pH值的NaCl溶液中的点蚀电位。结果表明,电位扫描速率为0.3～6 mV/s时,其对304不锈钢在NaCl溶液中的自腐蚀电位和点蚀电位以及滞后环的大小的影响较小。电子散斑干涉技术测量的点蚀电位表明304不锈钢的点蚀敏感性随着溶液浓度和温度的增加而增大,随着溶液pH值的增加而减小。 Polarization curves of 304 stainless steel in 3.5% NaCl solution at different potential scanning rates were measured by potentiodynamic scanning. Electron potentiometric scanning was used to measure the polarization curves of 304 stainless steel at different potentials, temperatures and pH values ​​using ESPI Pitting potential in solution. The results show that the potential corrosion rate, pitting potential and hysteresis loop size of 304 stainless steel in NaCl solution are less affected by the potential scan rate of 0.3-6 mV / s. The pitting potential measured by EDS indicates that the pitting sensitivity of 304 stainless steel increases with the increase of solution concentration and temperature and decreases with the increase of solution pH.