Comparison of Hot Corrosion Behavior of Ni_(36)Fe_(34)Al_(17)Cr_(10)Mo_(1)Ti_(2)and Ni_(34)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)Alloys in NaCl-KCl-Na_(2)SO_(4)Salt  

作　　者：Xiaoming Liu Fengyang Quan Yuan Gao Shaodong Zhang Jianbin Wang Zhijun Wang Junjie Li Feng He Jincheng Wang 

机构地区：[1]State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China [2]CNNC Key Laboratory for Severe Accident Research in Nuclear Power Safety,China Nuclear Power Engineering Co.,Ltd,Beijing 100840,China [3]Jiangxi Key Laboratory of Wear and Corrosion Resistant Materials,Jiangxi Hengda High Technology Co.,Ltd,Nanchang 330096,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2025年第2期205-217,共13页金属学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.51874245);the Natural Science Basic Research Program of Shaanxi(Program No.2022JC-28).

摘　　要：Hot corrosion in molten salt is a complex process,involving both chemical corrosion and electrochemical corrosion.Interfacial reactions and oxide dissolution can also impact the corrosion results.Compared with single component/type salt,multicomponent/type hot corrosion leads to more severe degradation,while the multi-component alloys offer potential chances for developing anti-corrosion metallic materials.In this study,we aim to elucidate the hot corrosion behavior and gain a better understanding of the corrosion mechanism of the multi-component alloys under multi-component/type NaCl-KCl-Na_(2)SO_(4)salt.The corrosion behavior of dual-phaseNi_(36)Fe_(34)Al_(17)Cr_(10)Mo_(1)Ti_(2)(HEA-1)and Ni_(34)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)(HEA-2)alloys was studied within NaCl-KCl-Na_(2)SO_(4)molten salt with mass ratios of 5:5:1 and 5:5:2.After exposure to the salt at 650°C for 168 h,it was found that the Ni_(34)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)exhibited better corrosion resistance thanNi_(36)Fe_(34)Al_(17)Cr_(10)Mo_(1)Ti_(2).The improved performance of Ni_(30)Co_(25)Fe_(12)Al_(15)Cr_(12)W_(2)alloy was attributed to the Co element,which facilitated the formation of dense oxides scale and enhanced scale adhesion.Alkali chlorides with stronger penetration ability dominated the corrosion process and alkali sulfate further aggravated the corrosion.The primary corrosion mechanisms involved in this process were identified as“electrochemical mechanism”attacking the body-centered cubic structure in the alloys and“active oxidation”causing dissolution of the alloy elements.

关 键 词：Multi-component salt Corrosion behavior Interfacial reaction Oxide scale Corrosion mechanism 

分 类 号：TG172[金属学及工艺—金属表面处理]