Enhancement of the corrosion resistance of Molybdenum by La2O3 dispersion
Enhancement of the corrosion resistance of Molybdenum by La2O3 dispersion
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DOI：
10.1016/j.corsci.2021.109469
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发表时间：
2021-04-21
影响因子：
8.3
通讯作者：
Sun, Jun
中科院分区：
文献类型：
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作者：
Cairang, Wande;Li, Tianshu;Sun, Jun
研究了纯钼和掺杂0.3wt.%钼的合金的腐蚀行为。研究了La 2 O3在充气3.5 wt.%在25摄氏度的氯化钠中。与纯钼相比，掺杂钼的耐蚀性显著提高，阳极极化电流密度减小，电荷转移电阻增大2 ~ 3倍。这种增强源于晶粒的细化和晶界的净化，由于添加La 2 O3，这有利于形成致密和保护性的氧化膜。我们的研究结果提供了一个配方，以提高钼合金的耐腐蚀性。
The corrosion behavior of pure Molybdenum (Mo) and Mo doped with 0.3 wt.% La2O3 was investigated in aerated 3.5 wt.% NaCl at 25 degrees C. Compared with the pure Mo, the doped Mo exhibits significantly increased corrosion resistance, with a smaller current density during anodic polarization and a 2 similar to 3 times larger charge transfer resistance. Such an enhancement originates from the refinement of grains and purification of the grain boundary due to the addition of La2O3, which facilitates the formation of a compact and protective oxide film. Our results provide a recipe to improve the corrosion resistance of Mo alloys.