高温防护涂层的熔盐热腐蚀研究进展  

Molten Salts Induced Hot Corrosion of High Temperature Protective Coatings:Research Progress

作　　者：李小亚 邹俭鹏[1] 石倩 代明江 林松盛 唐鹏 苏一凡 Li Xiaoya;Zou Jianpeng;Shi Qian;Dai Mingjiang;Lin Songsheng;Tang Peng;Su Yifan(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;National Engineering Laboratory of Modern Materials Surface Engineering Technology,Institute of New Materials,Guangdong Academy of Sciences,Guangzhou 510651,China;Guangdong Provincial Key Laboratory of Modern Surface Engineering Technology,Guangzhou 510651,China)

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]广东省科学院新材料研究所现代材料表面工程技术国家工程实验室,广东广州510651 [3]广东省现代表面工程技术重点实验室,广东广州510651

出　　处：《稀有金属材料与工程》2022年第11期3989-3997,共9页Rare Metal Materials and Engineering

基　　金：Guangdong Special Support Program(2019BT02C629);GDAS Project of Science Technology Development(2020GDASYL-20200402005);Science Research Fund of Guangdong Province(2016A030312015);Natural Science Foundation of Guangdong Province(2021A1515010442)。

摘　　要：高温热腐蚀是热元件主要失效形式之一,Na_(2)SO_(4)和NaCl熔盐会加速高温下的热腐蚀,甚至导致灾难性事故发生。本文就Na_(2)SO_(4)和/或NaCl熔盐引起的热腐蚀进行了讨论,其中Na_(2)SO_(4)是主要的腐蚀反应物,详细介绍了2种典型的热腐蚀行为和性能特点。重点介绍了几种热腐蚀模型和机理,以及Na_(2)SO_(4)、NaCl、Na_(2)SO_(4)+NaCl熔盐的反应公式和腐蚀机理。根据目前的研究状况来看,制备防护涂层是缓解热腐蚀的最佳途径,总结了近年来MCrAlY涂层、NiAl涂层、热障涂层和新型涂层的发展情况,并探讨了进一步提高涂层耐腐蚀性能的方法。最后,展望了防护涂层的未来发展方向。High temperature hot corrosion is one of main failure modes for the hot components.The Na_(2)SO_(4)and NaCl molten salts can accelerate the hot corrosion at high temperatures and even lead to the catastrophic accidents.Thus,this research discussed the molten salts(Na_(2)SO_(4)or/and NaCl)induced hot corrosion with Na_(2)SO_(4)as the main corrosion reactant.The corrosion behavior and performance characteristics of two typical types of hot corrosion were introduced.Several hot corrosion models and mechanisms were introduced,as well as the reaction formulas and corrosion mechanisms of Na_(2)SO_(4),NaCl,and Na_(2)SO_(4)+NaCl molten salts.According to the current research status,the protective coating is an optimal approach in the hot corrosion reduction.The advanced progress of the MCrAlY coatings,NiAl coatings,thermal barrier coatings,and novel coatings was summarized.In addition,the methods to further improve the corrosion resistance of coatings were investigated.Finally,the development direction of protective coatings was predicted.

关 键 词：热腐蚀 熔盐 高温防护涂层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]