摘要
为拓展氯化物熔盐的应用场景,在300℃的氩气中,研究了304不锈钢在NaCl-KCl-FeCl_(3)熔盐和盐蒸气中腐蚀500h的质量和微观形貌变化。结果表明:304不锈钢试样在NaCl-KCl-FeCl_(3)熔盐和盐蒸气中的质量损失分别为2.1mg/cm^(2)和11.2mg/cm^(2),腐蚀深度分别为10.9μm和17.4μm。腐蚀后304不锈钢的表面凹凸不平,有明显的脱落,但其结晶结构未发生明显变化。氯化物熔盐中微量的H2O引起304不锈钢的腐蚀加剧。该研究不仅为结构材料的筛选提供直接依据,而且为304不锈钢在NaCl-KCl-FeCl_(3)中腐蚀提供了重要的数据,具有重要的科学意义和研究价值。
In order to broaden the application of the chloride salts,the mass change,crystalline structure and micromorphology changes of the 304 stainless steel samples in the NaCl-KCl-FeCl_(3) molten salt and vapor were investigated at 300℃ in Ar for 500 h.The results show that the mass changes of the 304 stainless steel samples in the NaCl-KCl-FeCl_(3) molten salt and vapor are 2.1 mg/cm^(2) and 11.2 mg/cm^(2),respectively.The corrosion depths of the corroded 304 stainless steel samples are 10.9μm and 17.4μm,respectively.The crystalline structure of the corroded 304 stainless steel has not changed significantly,and the micro-morphology of the corroded 304 stainless steel has been uneven and obvious shedding.A certain H_(2)O content in the chloride salts causes the corrosion of 304 stainless steel to intensify.It not only provides a direct basis for the selection of structural materials,but also provides an important scientific significance for the study of corrosion behavior and mechanism of the 304 stainless steel in the chloride salts.
作者
杨志刚
唐忠锋
Yang Zhigang;Tang Zhongfeng(College of Science,Shenyang University of Chemical Technology,Liaoning,110142;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai,201800)
出处
《当代化工研究》
CAS
2024年第3期48-50,共3页
Modern Chemical Research
基金
中国科学院洁净能源创新研究院合作基金支持“仿生等级孔石墨/超高温熔盐相变蓄热元件的设计制备及储放热特性研究”(项目编号:DNL202012)。
关键词
熔盐
氯化盐
不锈钢
腐蚀
微观形貌
molten salt
chloride
stainless steel
corrosion
micromorphology
