Investigation on the hot corrosion behavior of a single crystal Ni-based superalloy in molten Na2SO4+K2SO4 salts improved by different preoxidation treatments

被引：9
作者：
Yang, Xiaowen [1 ]
Yang, Lanlan [2 ]
Wang, Jinlong [1 ]
Chen, Zehao [1 ]
Chen, Minghui [1 ]
Zhang, Jianqiang [3 ]
Wang, Fuhui [1 ]
机构：
[1] Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Zhenjiang 212003, Peoples R China
[3] UNSW Sydney, Sch Mat Sci & Engn, Sydney, Australia
来源：
CORROSION SCIENCE | 2023年 / 221卷
基金：
中国国家自然科学基金;
关键词：
A; Superalloys; C; Oxidation; C. Hot corrosion; HIGH-TEMPERATURE CORROSION; OXIDATION; RESISTANCE; COATINGS; MECHANISMS; MIXTURE; TA;
D O I：
10.1016/j.corsci.2023.111377
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study investigated the hot corrosion behavior of N5 in molten sulfate at 850 & DEG;C after different peroxidation treatments. The preoxidation was conducted at 900, 1000 and 1100 & DEG;C for 20 and 100 h, respectively. The preformed oxide scale featured a multilayered structure and varying degrees of Ta oxides. Among all, the samples preoxidized at 900 & DEG;C exhibited the highest corrosion resistance. But a porous structure with a large number of internal oxides and sulfides was observed when preoxidized at 1000 and 1100 & DEG;C. The alloy without preoxidation directly reacted with the molten salt to form a porous structure with internal oxides and sulfides.
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页数：12
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