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| EFFECT OF HYDROSTATIC PRESSURE ON THE CORROSION BEHAVIORS OF TWO LOW ALLOY STEELS |
| LIU Jie 1, LI Xiangbo 2, WANG Jia 1,3 |
1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100
2. Science and Technology on Marine Corrosion and Protection Laboratory, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266101
3. State Key Laboratory for Corrosion and Protection, Shenyang 110016 |
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Cite this article:
LIU Jie LI Xiangbo WANG Jia. EFFECT OF HYDROSTATIC PRESSURE ON THE CORROSION BEHAVIORS OF TWO LOW ALLOY STEELS. Acta Metall Sin, 2011, 47(6): 697-705.
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Abstract In this paper, the effect of hydrostatic pressure on the corrosion behaviors of two steels was investigated by weight loss test, electrochemical measurements, rust layer analysis and morphology observation in natural seawater environment with high–pressure in lab. The results showed that X steel was inclined to being corroded. With the increase of hydrostatic pressure, the corrosion resistance of two steels were deteriorated, which were attributable to the increase of the anodic reaction rate. Hydrostatic pressure had little effect on oxygen diffusion reductin process of X steel. Howeve, the cathodic current density of Y steel under higher hydrostatic pressure decreased because the coosion products were directly involved in cathodic reduction reaction. And with the increase of hydrostatic pressure, the morphology of two steels changed significantly and dfferently. Under high pressure, some shallo–dish shape localized corrosion appeared on the surface of X steel whereas on the surface of Y steel some tunnel localized crrsion appeared.
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Received: 29 December 2010
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