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| Effect of grain size on the atmospheric corrosion resistance of carbon steel in industrial environment |
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| 钢铁研究总院 |
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Cite this article:
;. Effect of grain size on the atmospheric corrosion resistance of carbon steel in industrial environment. J Chin Soc Corr Pro, 2007, 27(4): 193-196 .
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Abstract There kinds of carbon steels of different grain size with the same chemical composition were prepared by different rolling and heat treatment processes.The relationship between grain size and atmospheric corrosion resistance of carbon steel in industrial environment has been investigated by cyclic immersion corrosion test, micro-analysis of rust and electrochemical test, the polarization curves of different grain size steel in 10% H2SO4 solution were also tested. The results showed that the crack and cavity in the rust after cycle immersion corrosion test were decreased and the atmospheric corrosion resistance was increased by grain refinement of carbon steel from 50 μm to 4μm, but the corrosion rate of carbon steel was increased by grain refinement in 10% H2SO4 solution.The effect of grain sixe on the corrosion current density of local grain boundary was analysed and the mechanics of corrosion was discussed.
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Received: 01 March 2006
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