分析了汽轮机油中水汽对机组锈蚀造成的危害。提出了汽轮机油中添加 T746防锈剂的红外光谱测定的测试方法 ,介绍了测试原理及淮北电厂实测结果 ,对机组安全运行具有重要意义 The damage caused by steam in turbine oil to the unit corrosion is analyzed. The test method for the determination of T746 rust inhibitor added to the turbine oil is proposed. The principle of the test and the measured results of Huaibei Power Plant are introduced, which are of great significance to the safe operation of the unit