Microstructure and hot corrosion behavior of Co-Si modified aluminide coating on nickel based superalloys

被引：69
作者：
He, Haiyan [1 ]
Liu, Zongjie [1 ]
Wang, Wan [1 ]
Zhou, Chungen [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Minist Educ, Key Lab Aerosp Mat & Performance, Beijing 100191, Peoples R China
来源：
CORROSION SCIENCE | 2015年 / 100卷
基金：
中国国家自然科学基金;
关键词：
Metal coatings; Superalloys; Hot corrosion; CYCLIC OXIDATION RESISTANCE; PACK; AL; SILICON; CR;
D O I：
10.1016/j.corsci.2015.08.011
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Co-Si modified aluminide coating on nickel based superalloys was prepared by pack cementation process, then microstructure and hot corrosion resistance were studied. The mass gain of Co-Si modified aluminide coating is 0.32 mg/cm(2) after hot corrosion at 1173 K for 100 h. Si can boost the hot corrosion resistance by improving the formation of Al2O3. SiO2 has low solubility over a wide range of salt acidity and good stability in the melting Na2SO4 + NaCl, preventing rapid corrosion attack and prohibiting the high fluxing rate. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：466 / 473
页数：8
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