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| ACCELERATED CORROSION OF PLAIN 12CrMoV AND MILD STEEL CAUSED BY SO_3 FROM DECOMPOSITION OF FERRIC SULFATE |
| Li Shouchen Zhang Lihua Situ Meijuan Cao Tieliang and Shih Shengtai (Shanghai Institute of Metallurgy; Academia Sinica) |
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Abstract The corrosion behavior of plain 12CrMoV, mild steel, hot-dip aluminized 12CrMoV and mild steel was studied in SO_3 from decomposition of ferric sulfate by using a specially designed apparatus. The experimental results indicated that accelerated corrosion of plain 12CrMoV and mild steel was caused by SO_3 from decomposition of ferric sulfate. Corrosion products on plain 12CrMoV and mild steel specimens were the same, mainly ferric sulfate and ferrous sulfate, with no sulfide of metals either on surface or at scale/substrate interrace. The corrosion resistance of hot-dip aluminized 12CrMoV and mild steel were better than that of either uncoated steel. The corrosion products on surface of hot-dip aluminized 12CrMoV specimen were alumina and aluminum sulfate only while aluminum sulfate and ferric sulfate were found at coating/substrate interface. From the experimental results, possible mechanism of corrosion was proposed.
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Received: 25 June 1989
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Cite this article:
Li Shouchen Zhang Lihua Situ Meijuan Cao Tieliang and Shih Shengtai (Shanghai Institute of Metallurgy; Academia Sinica). ACCELERATED CORROSION OF PLAIN 12CrMoV AND MILD STEEL CAUSED BY SO_3 FROM DECOMPOSITION OF FERRIC SULFATE. J Chin Soc Corr Pro, 1989, 9(3): 207-213.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1989/V9/I3/207
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[1] 李守臣,张丽华,司徒美娟,石声泰等,中国腐蚀与防护学报,8(2) ,159,166(1988)
[2] Jones, R, L., High Temperature Corrosion, Ed, Rapp, R, A,, NACE 1440 Houson, Texas 77084, P513(1981) |
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