Effect of pre-oxidation on hot corrosion resistance of HR3C stainless steel in sulfate salt with or without Fe2O3

被引：16
|
作者：
Yu, Zheng [1 ]
Lu, Jintao [2 ]
Chen, Minghui [1 ]
Wang, Jinlong [1 ]
Wang, Fuhui [1 ]
机构：
[1] Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China
[2] Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 192卷
关键词：
Stainless steel; STEM; Hot corrosion; Sulfidation; BEHAVIOR; TECHNOLOGY; PLATELETS; OXYGEN; NI;
D O I：
10.1016/j.corsci.2021.109789
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
HR3C steel exhibits high oxidation resistance in air at 700 degrees C owing to the formation of a dense chmmia scale. In the presence of sulfate salt deposition (Na2SO4:K2SO4 = 1:1), hot corrosion occurs. It leads to the dissolution and re-precipitation of Cr2O3 platelets and severe internal corrosion. Pre-oxidation can notably enhance corrosion resistance with almost no internal corrosion zone. When the deposited sulfate salt contains Fe2O3 (Na2SO4 : K2SO4:Fe2O3 = 1:1:1), HR3C steel suffers even severer hot corrosion. Its scale spalls off easily and internal corrosion develops deep into the steel. Meanwhile, pre-oxidation played almost no positive effect on corrosion in sulfate salt containing Fe2O3.
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页数：9
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