Effect of moisture on corrosion of Ni-based alloys in molten alkali fluoride FLiNaK salt environments
Effect of moisture on corrosion of Ni-based alloys in molten alkali fluoride FLiNaK salt environments
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DOI：
10.1016/j.jnucmat.2013.02.021
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发表时间：
2013-06-01
影响因子：
3.1
通讯作者：
Kai, Ji-Jung
中科院分区：
文献类型：
--
作者：
Ouyang, Fan-Yi;Chang, Chi-Hung;Kai, Ji-Jung
我们研究了几种选定的合金在600℃和700℃下在不同水分含量的FLiNaK熔盐中的腐蚀特征。Hastelloys-N和Hastelloys-B3的耐蚀性较好，而Haynes 263的耐腐蚀性最差。试验合金的质量损失主要由FLiNaK盐的纯度决定，而温度对试验合金在未净化的FLiNaK盐中的质量损失的影响变得更加重要。当FLiNaK盐中存在残留水分时，合金的质量损失与原始铬含量加1/3的钼含量成线性关系。结构表征结果表明，在水分含量较高的FLiNaK盐中，合金会加剧晶间腐蚀和点蚀。(C)2013爱思唯尔B.V.保留所有权利。
We investigated the corrosion characteristics on several selected alloys at 600 and 700 degrees C in FLiNaK molten salts with different moisture contents. Hastelloys-N and Hastelloys-B3 exhibited better corrosion resistances, while Haynes 263 showed the poorest corrosion resistance. The mass loss of the tested alloys is primarily determined by the purity of FLiNaK salts; however, the effect of temperature becomes more important on the mass loss of the tested alloys in the non-purified FLiNaK salts. When the residual moisture is present in the FLiNaK salts, the mass losses of the tested alloys varied linearly with original Cr content plus one-third of Mo content. The results of structural characterization revealed that the tested alloys in the FLiNaK salts with higher moisture content would aggravate intergranular corrosion and pitting. (C) 2013 Elsevier B.V. All rights reserved.