本文着重介绍了椭偏术的基本原理及其在腐蚀研究领域中应用的技术问题及解决方法。并应用椭偏仪和电化学测试方法对不锈钢缝隙腐蚀表面膜的动力学规律进行了初步探讨,结果表明,椭偏术原理,计算是复杂的,但操作简便。用于腐蚀金属表面膜的原位测试,则有它独到的优点。 This article focuses on the basic principles of ellipsometry and its application in the field of corrosion research and technical problems and solutions. The kinetics of crevice corrosion on the surface of stainless steel was studied by ellipsometry and electrochemical test. The results show that the ellipsometry principle is complex, but the operation is simple. In situ testing for corrosion of metal surface films has its own unique advantages.