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张淑婷.Si对CoCrAlY涂层抗热腐蚀性能的影响[J].稀有金属材料与工程(英文),2017,46(10):2807~2811.[zhang shu ting.Effect of Si on Hot Corrosion Resistance of CoCrAlY Coating[J].Rare Metal Materials and Engineering,2017,46(10):2807~2811.]
Effect of Si on Hot Corrosion Resistance of CoCrAlY Coating
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Received:November 02, 2015  Revised:December 29, 2015
Key words: MCrAlSiY  Coating  Oxidation  Hot corrosion resistance
Foundation item:自然科学基金青年基金项目(51201012)、国际合作项目(2015DFA51530)
Author NameAffiliationE-mail
zhang shu ting Beijing General Institute of Mining and Metallurgy shutingzhang007@163.com 
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      Abstract: The hot corrosion resistance of CoCrAlSiY coating with different Si concentrations (0%, 2% and 5%) at 900 ℃ was discussed by using hot salt coating method with a mixed salt of 75wt% Na2SO4+25wt% NaCl. The CoCrAlSiY coating was prepared by HVOF method. The results show that the average corrosion penetration depth of coating increases with the rising temperature, while the increasing Si concentration decreases the average corrosion penetration depth of coating. Furthermore, CrSi, a high melting point metal silicide, is generated inside the CoCrAlSiY corrosion coating. Thus it is beneficial for improving the corrosion resistance of coating.