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Electrochemical Behavior in Erosion- Corrosion of Carbon Steel in liquid-Solid Double Phase Flow Loop |
Xingling Tian;Yuzhen Lin;Jingjun Liu;Xingyue Yong |
北京化工大学材料科学与工程学院 |
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Abstract The electrochemical behavior in erosion-corrosion of carbon steel in flowing liquid-solid double phase solution was studied with self-made flow loop simulating apparatus. The experimental results showed that erosion-corrosion rate in flowing double phase 3.5% NaCl solution containing 5% sand increases markedly with increasing flow velocity. But it was not found that the erosion-corrosion rate-decreased region which happened in flowing single phase solution existed. The erosion-corrosion process of carbon steel in flowing liquid-solid double phase solution is still controlled by cathodic oxygen diffusion process. Once cathodic current was impressed on carbon steel, the erosion-corrosion rate of carbon steel decreases abruptly because the corrosion electrochemistry factor is restrained and the synergism is weakened. It was verified that corrosion electrochemical factor plays a dominant role in erosion-corrosion.
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Received: 30 January 2003
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Corresponding Authors:
Yuzhen Lin
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