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Theoretical Study in Adsorption Behavior of S and Cl on Surface and its Effect on Corrosion Performance of γ-FeM(111) (M = Cr, Ni, Mn, Mo, Cu, Ce) |
DONG Nan, QIN Weirong, HAN Peide( ) |
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China |
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Cite this article:
DONG Nan, QIN Weirong, HAN Peide. Theoretical Study in Adsorption Behavior of S and Cl on Surface and its Effect on Corrosion Performance of γ-FeM(111) (M = Cr, Ni, Mn, Mo, Cu, Ce). Journal of Chinese Society for Corrosion and protection, 2024, 44(6): 1566-1572.
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Abstract The adsorption behavior of S and Cl on γ-FeM(111) (M = Cr, Ni, Mn, Mo, Cu, Ce) surface and its influence on the corrosion performance of the latter, as well as the effect of the applied tensile and compressive stress on the surface stability of the γ-FeM(111) were studied by first principles calculation method. The calculation results show that S and Cl are most easily adsorbed at hcp- and fcc-sites on γ-Fe(111) surface, as a result from this, the electronic work function of S and Cl adsorbed surfaces decreases, accordingly, the corrosion resistance becomes weak for the γ-FeM(111) absorbed with S and Cl. The surface of γ-FeM(111) alloyed with M = Cr, Ni, Mn, Mo, Cu, Ce is resistant to Cl corrosion. Among the alloying elements, Mo, Cu and Ce can synergistically improve the resistance to S and Cl corrosion. Under compressive stress, the electron work function of the γ-FeM(111) (M = Cr, Ni, Mn, Mo, Cu, Ce) surface adsorbed with S and Cl increases, while the electron work function decreases under tensile stress. The joint action of S, Cl and tensile stress greatly reduces the surface corrosion resistance.
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Received: 21 February 2024
32134.14.1005.4537.2024.052
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Fund: Natural Science Foundation of Shanxi Province(202203021221085) |
Corresponding Authors:
HAN Peide, E-mail: hanpeide@tyut.edu.cn
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