林波,赵鹏展

• 1:重庆科创职业学院汽车工程学院
• 2:重庆城市职业学院信息与智能制造学院

摘要(Abstract)：

为了评价2507超级双相不锈钢在低温多效海水淡化装置中的适用性，通过扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、X射线光电子能谱仪(XPS)和电化学测试等研究了2507超级双相不锈钢在不同温度高浓度海水中的耐腐蚀性能。结果表明：在不同温度的2倍浓度的海水中，2507超级双相不锈钢发生选择性点蚀，铁素体相为腐蚀弱相，点蚀分布在铁素体相区域。随着2倍浓度海水的温度从20℃升高至70℃,2507超级双相不锈钢的自腐蚀电位、点蚀电位和再钝化电位分别降低87、142和168 mV,腐蚀电流密度增大约1倍，低频阻抗模值减小约0.44倍。恒电位极化生成的钝化膜组成均为Fe、Cr、Mo和Ni的氧化物和氢氧化物，温度的升高促进钝化膜中Fe的溶解和Cr、Mo和Ni的富集，钝化膜的施主密度和受主密度略微增大。虽然2507超级双相不锈钢在高温高浓度海水中的耐腐蚀性能略微下降，但仍然维持较好的耐腐蚀性能，其适用于低温多效海水淡化装置的建造材料。

关键词(KeyWords)： 2507超级双相不锈钢;低温多效海水淡化;高温高浓度海水;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 重庆市教育委员会科学技术研究项目(KJQN202305414);重庆市教育委员会科学技术研究计划青年项目资助项目(KJQN202303910);重庆市教育委员会科学技术研究项目(KJQN202205401)

作者(Author): 林波,赵鹏展

DOI: 10.13289/j.issn.1009-6264.2024-0110

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