A review on molten sulfate salts induced hot corrosion

被引：93
作者：
Hu, Shanshan [1 ]
Finklea, Harry [2 ]
Liu, Xingbo [1 ]
机构：
[1] West Virginia Univ, Mech & Aerosp Engn Dept, Benjamin M Statler Coll Engn & Mineral Resources, Morgantown, WV 26506 USA
[2] West Virginia Univ, C Eugene Bennett Dept Chem, Morgantown, WV 26506 USA
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2021年 / 90卷
关键词：
Hot corrosion; Molten sulfate salts; Protective oxide layer; Dissolution; Anti-corrosion coatings; HIGH-TEMPERATURE CORROSION; MODIFIED SILICIDE COATINGS; DUPLEX STAINLESS-STEEL; Y CODEPOSITION COATINGS; THERMAL POWER-PLANT; FUSED NA2SO4 FILM; CR-NI ALLOY; FAILURE ANALYSIS; OXIDATION RESISTANCE; PREOXIDIZED NI;
D O I：
10.1016/j.jmst.2021.03.013
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hot corrosion has been extensively observed in various high temperature applications, which might cause large economic losses. To deepen the insight and understanding of hot corrosion, herein, we provide a detailed discussion on hot corrosion induced by molten sulfate salt, in which Na2SO4 is the main chemical reactant. The hot corrosion is triggered and sustained by the negative solubility gradient of protective oxide from the oxide/salt interface to salt/gas interface. In this work, we reviewed several key factors, including temperature, gas composition, molten salt composition, alloy element and external stress, influencing the hot corrosion of alloy beneath the molten salt. The application of anti-corrosion coating seems to be the most effective and commercial mothed to mitigate hot corrosion. Therefore, the progress of the development of effective coatings, e.g., Ni-Cr coatings, aluminide coatings, silicide coatings and MCrAlY(X) coatings, has also been summarized. (C) 2021 Published by Elsevier Ltd on behalf of Chinese Society for Metals.
引用
收藏
页码：243 / 254
页数：12
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