Na_2SO_4-MgSO_4-CaSO_4 INDUCED HOT CORROSION OF IRON BASE ALLOYS Ⅰ. CORROSION BEHAVIOUR IN AIR

J Chin Soc Corr Pro

1990, Vol. 10

Issue (2): 127-134 DOI:

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Na_2SO_4-MgSO_4-CaSO_4 INDUCED HOT CORROSION OF IRON BASE ALLOYS Ⅰ. CORROSION BEHAVIOUR IN AIR

Shi Liangquan Zhang Yunshu and Shih Shengtai (Shanghai Institute of Metallurgy; Academia Sinica)

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Abstract The corrosion behaviour of Fe~-Cr alloys in the presence of a thin layer of Na_2SO_4-MgSO_4-CaSO_4 was studied in air in the temperature range of 700～800℃ by means of thermogravimetry and some physical analysis techniques such as X-ray diffraction, SEM, EMP, etc. It was found that the molten ternary sulfates accelerated the oxidation of the alloys. The experimental results lead to a proposition that the accelerated oxidation is related to the chromium depletion resulting from sulfidation and easier diffusion of metal ions through the sulfides formed.

Received: 25 April 1990

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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 Ⅰ. CORROSION BEHAVIOUR IN AIR. J Chin Soc Corr Pro, 1990, 10(2): 127-134.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1990/V10/I2/127

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