Corrosion behavior of In625 alloy and 316L stainless steel in NaCl-CaCl2-MgCl2 ternary eutectic molten salt

被引：0
|
作者：
Liu B. [1 ]
Wei X. [1 ]
Wang W. [2 ]
Song M. [1 ]
Ding J. [2 ]
机构：
[1] School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, Guangdong
[2] School of Engineering, Sun Yat-sen University, Guangzhou, 510006, Guangdong
来源：
Wei, Xiaolan (xlwei@scut.edu.cn) | 1600年 / Materials China卷 / 68期
基金：
中国国家自然科学基金;
关键词：
Chloride molten salt; Corrosion; Nickel based Inconel 625 alloy; Stainless steel;
D O I：
10.11949/j.issn.0438-1157.20170131
中图分类号：
学科分类号：
摘要：
Isothermal corrosion of 316L stainless steel and nickel based Inconel 625 alloy was evaluated by total immersion in eutectic NaCl-CaCl2-MgCl2 molten salt at 500-700℃.The effect of chromium (Cr), air contact, and temperature on corrosion was studied. Corrosion dynamic and velocity curves of 316L and Inconel 625 alloy at 600℃ molten salt for 21 d were obtained. X-Ray diffraction (XRD), scanning electron microscope (SEM) and X-ray energy spectrometer (EDX) were used to analyze corrosion products and cross section morphologies. The results show that mass loss of the steel and alloy increases with the increase of air contact and corrosion temperature. Element and morphology of metal surface and cross section after 21 d immersion at 600℃ indicate that Cr has a preferential solubility to other elements, which Cr depletion region was observed across cross-section. The dense layer of corrosion products can reduce corrosion rate. Inconel 625 exhibits better corrosion resistance than austenitic stainless steel in NaCl-CaCl2-MgCl2 eutectic molten salt. © All Right Reserved.
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页码：3202 / 3210
页数：8
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