Effect of alloying on corrosion resistance of B2 FeAl alloy in aqueous solution of sulfuric acid
Effect of alloying on corrosion resistance of B2 FeAl alloy in aqueous solution of sulfuric acid
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DOI：
10.1016/j.matchemphys.2010.11.020
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发表时间：
2011-03
影响因子：
4.6
通讯作者：
K. Kowalski;B. Łosiewicz;A. Budniok;M. Kupka
中科院分区：
文献类型：
--
作者：
K. Kowalski;B. Łosiewicz;A. Budniok;M. Kupka
进行这项工作的目的是确定添加 Cr、Zr 和 B 的合金化对环境温度下 FeAl 合金在硫酸水溶液中的耐腐蚀性能的影响。电化学研究包括经典方法与电化学阻抗谱 (EIS) 相结合。在腐蚀电位下进行了EIS检查，并证实了腐蚀活化机制。结果表明，引入合金元素后，B2 铝化铁的耐水腐蚀性能得到改善。根据显微组织研究，在 FeAl 合金中发现了点蚀，并且在 Cr、Zr 和 B 掺杂的 FeAl 合金中观察到了晶间腐蚀症状。
This work has been undertaken in order to determine the effect of alloying with Cr, Zr and B additions on corrosion resistance of FeAl alloy in aqueous solution of sulfuric acid, at ambient temperature. Electrochemical investigations comprised classical methods combined with electrochemical impedance spectroscopy (EIS). EIS examinations have been carried out at the corrosion potential and confirmed the corrosion activation mechanism. The results have shown improved aqueous corrosion resistance of B2 iron aluminide after introduction of alloying elements. Based on the microstructure investigations, the pitting corrosion has been identified in the FeAl alloy, and intercrystalline corrosion symptoms have been observed in the Cr-, Zr- and B-doped FeAl alloy.