摘要
通过电化学阻抗谱、极化曲线、临界点蚀温度等方法,研究了254SMo超级奥氏体不锈钢在某电厂高炉煤气模拟冷凝液中的耐腐蚀性能。结果显示,随着溶液温度的升高,254SMo不锈钢电极的阻抗值降低,钝态电流密度增大。溶液温度较低时不锈钢循环极化曲线上出现了较小的滞后环,钝化膜的修复能力较好;当溶液温度为65℃时,循环极化曲线上出现了较大的滞后环,不锈钢表面钝化膜受到了点蚀破坏。254SMo不锈钢在模拟冷凝液中的临界点蚀温度为62℃。
Anti-corrosion performance of 254 SMo super-austenitic stainless steel in simulated condensate of blast furnace gas of a power plant was studied by means of electrochemical impedance spectroscopy, polarization curve and critical pitting temperature measurement. The results show that the corrosion resistance of 254 SMo stainless steel decreases and the passive current density increases as the test temperature rises. When the test temperature is lower, a very small hysteresis loop appears on the circular polarization curve of the stainless steel, which means the strong re-passivation ability of the passive film. As the test temperature reaches to 65 ℃, a large hysteresis loop appears on the circular polarization curve of stainless steel, indicating the pitting damage of the surface passivation film. The critical pitting temperature of stainless steel in simulated condensate is 62 ℃.
作者
周彬
金志浩
葛红花
ZHOU Bin, JIN Zhihao2＇3, GE Honghua2(1 Power Plant of Baoshan Iron ＆ Steel Co., Ltd, Shanghai 201900, China 2 Shanghai Engineering Research Center of Energy- Saving in Heat Exchange Systems, Shanghai Key Laboratory for Electric Power Material Protection and New Materials, Shanghai University of Electric Power, Shanghai 200090, China 3 Shanghai Shenhang Basic Engineering Co., Ltd, Shanghai 200032, Chin)
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2018年第2期163-166,共4页
Corrosion Science and Protection Technology
