利用扫描电镜(SEM)、X射线光电子谱(XPS)、X射线衍射(XRD)分析以及电化学实验研究了乙醇胺(ETA)浓度对碳钢和690合金浸泡腐蚀和电化学腐蚀行为的影响.结果表明,碳钢的点蚀随着浓度的增加明显减少,碳钢表面腐蚀产物的主要成分为Fe3O4,690合金表面膜中没有观察到双层膜结构;在浓度为40、50、80 mg/L时观察到Cr的富集峰.在280℃条件下的电化学实验结果表明,ETA浓度为20 mg/L和40 mg/L时,对碳钢和690合金的电化学腐蚀行为影响不大.而在80 mg/L时,两种材料的腐蚀电流密度下降较多,极化电阻显著增大.
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