热力发电2023，Vol.52Issue(11)：186-192,7.DOI:10.19666/j.rlfd.202301299
燃气轮机发电机组备用中余热锅炉省煤器鳍片管防腐研究
Study on anticorrosion of waste heat boiler economizer fin tube of gas turbine generator unit in standby state
摘要
Abstract
During frequent long-term standby state of gas turbine generator unit,the surface of 08A1 carbon steel of waste heat boiler economizer fin tube will have serious corrosion problems.In this paper,the macroscopic corrosion phenomenon and corrosion rate of 08A1 carbon steel above the critical humidity were studied by the method of hanging piece and electrical resistance probe.The results show that the corrosion rate of 08A1 carbon steel is the fastest in the first 5 days under the constant environment of 20 ℃ and relative humidity of 70％,and the corrosion depth reaches up to 0.85 μm,accounting for 47.7％of the total change in the whole process.However,the most obvious corrosion phenomenon,including the change of weight and the surface corrosion area,occurred from about the 19th to the 25th day.With the relative humidity gradually increasing from the critical humidity of 70％(ambient temperature 20 ℃),the corrosion evaluation indexes of 08A1 carbon steel show a linear upward trend.Nitrogen filling maintenance strategy under long-term standby state was formulated,effectively alleviating the corrosion condition of economizer fin tube of waste heat boiler.关键词
燃气轮机发电机组/鳍片管/08A1碳钢/腐蚀过程/防腐策略Key words
gas turbine generator unit/fin tube/08A1 carbon steel/corrosion process/anticorrosion strategy引用本文复制引用
俞哲锋,陶振涛,许茂贤,闫凤平,周永刚,黄岳,赵虹..燃气轮机发电机组备用中余热锅炉省煤器鳍片管防腐研究[J].热力发电,2023,52(11):186-192,7.基金项目
浙江省能源集团有限公司科学技术项目(ZNJK-2021-030)Sience and Technology Project of Zhejiang Energy Group Co.,Ltd.(ZNJK-2021-030) （ZNJK-2021-030）
