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Abstract The corrosion kinetics and corrosion product morphology of commercial pure iron and some Fe-Cr alloys were studied in O_2-0.1 %(SO_2 + SO_3) environment at 700～800℃ when there existed a thin layer of ternary sulfa tes, Na_2SO_4-MgSO_4-CaSO_4, on the surface of the alloys,The experimental results showed that the presence of sulfates induced hot corrosion of commercial pure iron and some Fe~-Cr alloys, and that hot corrosion in O_2-0.1%(SO_2+SO_3) was much more severe than that in air. On the basis of the experimental results, a sulfidation mechanism is proposed to explain this kind of hot corrosion.
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Received: 25 April 1990
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Cite this article:
Shi Liangquan; Zhang Yunshu and Shih Shengtai (Shanghai Institute of Metallurgy; Academia Sinica). Na_2SO_4-MgSO_4-CaSO_4 INDUCED HOT CORROSION OF IRON-BASE ALLOYS Ⅱ. CORROSION BEHAVIOUR IN O_2-0.1% ( SO_2+SO_3 ) ENVIRONMENT. J Chin Soc Corr Pro, 1990, 10(2): 135-142.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1990/V10/I2/135
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