Effect of Surface Decarburization on Corrosion Behavior of GH3535 Alloy in Molten Fluoride Salts
Effect of Surface Decarburization on Corrosion Behavior of GH3535 Alloy in Molten Fluoride Salts
复制标题
表面脱碳对GH3535合金在熔融氟化盐中腐蚀行为的影响
DOI：
10.1007/s40195-018-0814-5
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Zhou Xing Tai
中科院分区：
文献类型：
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作者：
Hou Juan;Han Fen Fen;Ye Xiang Xi;Leng Bin;Liu Min;Lu Yan Ling;Zhou Xing Tai
对具有脱碳层的Ni-16 Mo-7 Cr合金在700 °C的FLiNaK盐中进行了腐蚀试验。进行了详细的微观结构研究，以调查腐蚀行为和机制。结果表明，腐蚀后的合金表面均形成了富铁层。表面脱碳对合金的耐腐蚀性能影响不大，但使腐蚀层下M2 C碳化物的生成增多。这是由于在腐蚀过程中石墨坩埚壁释放出的碳含量增加，导致合金表面附近的碳浓度梯度增大。
Corrosion test of a Ni–16Mo–7Cr alloy with a decarburized layer was conducted in FLiNaK salt at 700 °C. A detailed microstructure study was performed to investigate the corrosion behavior and mechanisms. The results show that the Fe-rich layers were formed on the corroded alloys with and without decarburization. The surface decarburization had little influence on the corrosion resistance of the alloy, whereas it caused moreM2C carbide formation beneath the corrosion layer. That is attributed to the higher concentration of C gradient near the alloy surface, which was resulted from the increase in C content liberated from graphite crucible wall during the corrosion process.