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：5

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.

引用

页数：12

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