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EFFECT OF ELEMENT N ON THE MICROSTRUCTURE OF CO2 CORROSION FILM OF 2Cr13 STAINLESS STEELS |
北京科技大学材料科学与工程学院 |
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Cite this article:
. EFFECT OF ELEMENT N ON THE MICROSTRUCTURE OF CO2 CORROSION FILM OF 2Cr13 STAINLESS STEELS. Acta Metall Sin, 2006, 42(12): 1279-1284 .
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Abstract In this paper, the effect of N element on the CO2 corrosion capability of the 2Cr13 stainless steel was researched.The corrosion films of the steels were observed by SEM, and the surface components of the films were analyzed by XPS; the electrochemical impedance spectrum (EIS) of the steels was analyzed by impedance measure system ( PARSTAT 2273), and the corrosion rates of the stainless steels was measured by weight loss method. The obtained results show that the structure of the corrosion film of the 13CrMoTiNbN steel is looser, Cr2O3 is replaced by CrN and Na3CrO4 on the surface of the film, and there is a amount of Fe3O4 and a-FeOOH phases. The impedance value of the 13CrMoTiNbN steel is less than the 13CrMoTiNb steel, and the corrosion rate of the 13CrMoTiNbN steel is more.
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Received: 14 March 2006
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