李萍,秦鹏,庞胜娇,赵杰,李廷举

• 1:大连理工大学材料科学与工程学院

摘要(Abstract)：

应用XRD、SEM(EDS)和EMPA等分析方法研究了预涂覆碱金属硫酸盐的Super304H在模拟烟气环境下的高温腐蚀特性。结果表明,Super304H在模拟气氛下的腐蚀动力学呈"抛物线"趋势递增;腐蚀产物由较多的富铁氧化物、部分Cr2O3以及少量尖晶石结构的复杂氧化物与Fe/Ni硫化物组成;SO2浓度的提高加速了合金的腐蚀,氧化膜明显增厚,与基体结合程度变差甚至剥离,腐蚀影响区孔隙密度增大,腐蚀深度增加。分析认为:Super304H在模拟烟气环境中的腐蚀归因于合金元素的氧化与硫化、三元共晶复合盐的形成以及金属(氧化物)在熔盐中的溶解。

关键词(KeyWords)： 超超临界燃煤发电;烟侧腐蚀;碱金属硫酸盐;低温热腐蚀

Abstract:

Keywords:

基金项目(Foundation): 自然科学基金联合基金项目重点项目(51134013);; 国家自然科学基金面上项目(51171037)

作者(Author): 李萍,秦鹏,庞胜娇,赵杰,李廷举

DOI: 10.13289/j.issn.1009-6264.2015.10.034

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