Hot Corrosion Behavior of a Cr-Modified Aluminide Coating on a Ni-Based Superalloy

查看全文 作　　者：Duoli [1]Wu;Sumeng [1]Jiang;Qixiang [1]Fan;Jun [1]Gong;Chao [1]Sun

机构地区：[1]State Key Laboratory of Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2014年第27卷第4期,共8页

基　　金：financially supported by the National Natural Science Foundation of China (No.51001106);National Basic Research Program of China (No.2012CB625100) 摘　　要：A Cr-modified aluminide coating is prepared on a Ni-based superalloy using arc ion plating and subsequent pack cementation aluminizing.Hot corrosion behavior of the Cr-modified aluminide coating exposed to molten Na2SO4/K2SO4(3:1) or Na2SO4/NaCl(3:1) salts at 900 °C in static air are evaluated as well as the aluminide coating.The results indicate that compared with the aluminide coating,the anti-corrosion properties of the Cr-modified aluminide coating in the both salts are improved,which should be attributed to the beneficial effect of the Cr in the coating.The corrosion mechanism of the Cr-modified aluminide coating,especially the role of Cr in the mixture salt corrosion,is discussed. 关键词：铝化物涂层腐蚀行为镍基高温合金铬涂层改性镍基超合金电弧离子镀盐腐蚀

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Hot Corrosion Behavior of a Cr-Modified Aluminide Coating on a Ni-Based Superalloy

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