航空发动机高温涂层腐蚀失效研究进展  

Research Progress on Corrosion Failure of High-Temperature Coatings in Aero-Engines

作　　者：孙毅 李宗宝 马菱薇 原慷 SUN Yi;LI Zongbao;MA Lingwei;YUAN Kang(BGRIMM Technology Group,Beijing 100160,China;Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry Parts,Beijing 102206,China;Beijing Key Laboratory of Special Coating Material and Technology,Beijing 102206,China;University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]矿冶科技集团有限公司,北京100160 [2]北京市工业部件表面强化与修复工程技术研究中心,北京102206 [3]特种涂层材料与技术北京市重点实验室,北京102206 [4]北京科技大学,北京100083

出　　处：《热喷涂技术》2024年第2期1-19,共19页Thermal Spray Technology

基　　金：云南省材料基因工程专项(202302AB080021)。

摘　　要：航空发动机中高温涂层部件在不同的工况下会发生差异化的腐蚀现象。简要介绍了YSZ热障涂层、MCrAlY涂层的主要失效模式,重点梳理了这两类涂层的典型腐蚀失效形式,包括酸性腐蚀、熔盐腐蚀、CMAS腐蚀等。酸性腐蚀是涂层在潮湿环境且一般含有氯、硫条件下发生的弱酸性腐蚀,腐蚀温度为常温。熔盐腐蚀主要针对航空发动机在海洋环境下YSZ热障涂层及MCrAlY涂层面临熔融态盐(如NaCl、Na_(2)SO_(4))发生的腐蚀,腐蚀温度一般为500~1000℃。CMAS腐蚀主要是由沙漠、尘土环境下的复合氧化物引起陶瓷涂层失效,腐蚀温度一般高于1200℃。最后对YSZ热障涂层及MCrAlY涂层的腐蚀失效机理及未来研究方向进行总结和展望。The high-temperature coating parts in aero-engines can be corroded under different working conditions.In this paper,YSZ thermal barrier coatings,MCrAlY coatings and their main failure modes were briefly introduced.The corrosion-induced failure behavior of those two types of was summarized,including acid corrosion,molten salt corrosion and CMAS corrosion.Acid corrosion is a kind of slowly corrosion of the coatings in humid environment containing chlorine and sulfur,which the corrosion can occur at room temperature.Molten salt corrosion is mainly caused by reactions between some molten salts(such as NaCl,Na_(2)SO_(4))and YSZ thermal barrier coatings or MCrAlY coatings in typical marine environment,and the corrosion temperature is generally 500-1000℃.CMAS corrosion occurs in ceramic coatings corroded by some composite oxides in desert and dust environment at temperature generally higher than 1200℃.Finally,the corrosion failure mechanism and future research direction of YSZ thermal barrier coating and MCrAlY coating were summarized and prospected.

关 键 词：YSZ热障涂层 MCRALY 酸性腐蚀 熔盐腐蚀 CMAS腐蚀 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TB304[金属学及工艺—金属学]