压气机叶片防护涂层在热盐交替作用下的失效机理

骆晨; 张安琴; 杨丽媛; 周宇; 赵明亮; 姜国杰; 詹中伟

doi:10.7643/ issn.1672-9242.2025.10.006

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装备环境工程 ›› 2025, Vol. 22 ›› Issue (10) : 43-51. DOI: 10.7643/ issn.1672-9242.2025.10.006

航空航天装备

压气机叶片防护涂层在热盐交替作用下的失效机理

骆晨¹, 张安琴², 杨丽媛¹, 周宇¹, 赵明亮¹, 姜国杰¹, 詹中伟¹

作者信息 +

Failure Mechanism of Compressor Blade Protective Coatings under Thermal Salt Alternation

LUO Chen¹, ZHANG Anqin², YANG Liyuan¹, ZHOU Yu¹, ZHAO Mingliang¹, JIANG Guojie¹, ZHAN Zhongwei¹

Author information +

文章历史 +

摘要

目的研究大气环境-工况循环对压气机叶片防护涂层退化的影响。方法设计模拟海洋环境-高温耦合作用的试验,对不同时间试验后的压气机叶片试验件开展性能检测,分析腐蚀环境对涂层组织、成分的影响程度,研究防护涂层在海洋环境-高温耦合作用下的腐蚀损伤机理,获得防护涂层损伤程度随时间的退化规律。结果压气机叶片无机盐铝涂层失效的必要条件是外界环境水分、电解液渗透至TWL-12底层和不锈钢界面,且金属铝颗粒腐蚀严重,作用于不锈钢的阴极保护电流密度同步下降,不锈钢在电解液、Cl^–的作用下开始腐蚀。防护涂层损伤面积随试验时间延长而增加,在第2、3周期模拟加速试验出现平台特征,之后快速扩大。结论与水分、氯离子、温度等因素相比,压气机叶片无机盐铝涂层的失效过程受到pH值的影响更大,在舰载机发动机腐蚀防护上应用时需要采取一定措施。

Abstract

The work aims to study the effect of atmospheric environment operating cycles on the degradation of protective coatings on compressor blades. Experiments simulating the coupling effect of marine environments and high temperature were designed and property tests were conducted on compressor blade specimens after different test time, to analyze the degree of influence of corrosive environments on coating structure and composition, study the corrosion damage mechanism of protective coatings under the coupling effect of marine environments and high temperature, and obtain the degradation law of protective coating damage degree over time. The necessary conditions for the failure of the inorganic salt aluminum coating on compressor blades were the infiltration of environmental moisture and electrolyte into the TWL-12 layer and the stainless steel interface, and severe corrosion of metal aluminum particles. The cathodic protection current density acting on stainless steel decreased, and stainless steel began to corrode under the action of electrolyte and Cl^–. The damage area of the protective coating increased with the extension of the test time, and platform characteristics appeared in the second and third cycles of simulated accelerated testing, followed by rapid expansion thereafter. Compared with factors such as moisture, chloride ions, and temperature, the failure process of the inorganic salt aluminum coating on compressor blades is more affected by pH. Therefore, certain measures need to be taken when applying it to corrosion protection of shipborne aircraft engines.

导出引用

骆晨, 张安琴, 杨丽媛, 周宇, 赵明亮, 姜国杰, 詹中伟. 压气机叶片防护涂层在热盐交替作用下的失效机理[J]. 装备环境工程. 2025, 22(10): 43-51 https://doi.org/10.7643/ issn.1672-9242.2025.10.006

LUO Chen, ZHANG Anqin, YANG Liyuan, ZHOU Yu, ZHAO Mingliang, JIANG Guojie, ZHAN Zhongwei. Failure Mechanism of Compressor Blade Protective Coatings under Thermal Salt Alternation[J]. Equipment Environmental Engineering. 2025, 22(10): 43-51 https://doi.org/10.7643/ issn.1672-9242.2025.10.006

中图分类号： TG172

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