Corrosion behavior of Fe based container alloys in molten Na2CO3-K2CO3 as thermal energy storage medium for reversible solid oxide cells

被引：1
|
作者：
Wang, Junwei [1 ,2 ,3 ]
Liu, Hua [3 ]
Liu, Yuliang [3 ,4 ]
Chen, Ming [3 ]
机构：
[1] Jimei Univ, Dept Marine Engn, Fujian Prov Key Lab Naval Architecture & Marine En, Xiamen 361021, Peoples R China
[2] Qinghai Univ, Coll Mech Engn, Xining 810016, Peoples R China
[3] Tech Univ Denmark, Dept Energy Convers & Storage, DK-2800 Lyngby, Denmark
[4] Henan Univ Sci & Technol, Prov & Minist Coconstruct Collaborat Innovat, Sch Mat Sci & Engn, Met New Mat & Adv Proc Technol, Luoyang 471023, Peoples R China
来源：
CORROSION SCIENCE | 2023年 / 225卷
关键词：
Molten salt; Steel; High temperature corrosion; Selective oxidation; Intergranular corrosion; CARBONATE FUEL-CELLS; LATENT-HEAT STORAGE; ELECTROLYSIS SYSTEM; HOT CORROSION; 12KH17; STEEL; SALT; RESISTANCE; COATINGS; GENERATION; REDUCTION;
D O I：
10.1016/j.corsci.2023.111616
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work corrosion behavior of SUS 441, Crofer 22 APU and Canthal APM in molten Na2CO3-K2CO3 at 800 degrees C is studied. The 441 and APU corrode heavily as the element Cr in the steel is oxidized to NaCrO2. Cr diffuses along grain boundary preferentially and the molten salt penetrates through the corrosion layer. Several porous corrosion layers rich in Cr, O, Na or rich in Fe are formed alternatively on the APU surface. On the contrary, the APM alloy shows excellent corrosion resistance (0.02 mm/y) due to formation of a protective Al2O3 layer.
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页数：18
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