Effect of Co on oxidation and hot corrosion behavior of two nickel-based superalloys under Na_(2)SO_(4)-NaCl at 900℃

作     者：Jun-sheng MENG Ming-xuan CHEN Xiao-ping SHI Qiang MA 孟君晟;陈明宣;史晓萍;马强

作者机构：Naval Architecture and Port Engineering CollegeShandong Jiaotong UniversityWeihai 264200China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2021年第31卷第8期

页      面：2402-2414页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financial supports from the Natural Science Foundation of Shandong Province,China(No.ZR2019MEE107) Shandong Jiaotong University“Climbing”Research Innovation Team Program,China(No.SDJTC1802) PhD Scientific Research Foundation of Shandong Jiaotong University,China(No.BS2018005) 

主　　题：nickel based superalloys oxidation hot corrosion spallation resistance 

摘      要：Nickel-based superalloys with and without Co by partial replacement of W were prepared using double vacuum melting.A comparison of the oxidation in air and hot corrosion behaviors under molten 75 wt.%Na2 SO4+25 wt.%NaCl at 900℃were systematically *** results showed that partial replacement of W with Co promoted the formation of chromia scale and consequently decreased the oxidation ***,the addition of Co also retarded the internal oxidation/nitridation of Al and consequently promoted the growth of Al_(2) O3 scale,which further decreased the scaling rate and improved the adhesion of ***,the addition of Co also further improved the hot corrosion resistance under molten Na2 SO4-NaCl salts.