Electrochemical Behavior in Erosion- Corrosion of Carbon Steel in liquid-Solid Double Phase Flow Loop

J Chin Soc Corr Pro

2004, Vol. 24

Issue (1): 48-51 DOI:

Research Report

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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.

Key words: carbon steel flowing liquid/solid solution flow loop system erosion-corrosion corrosion electrochemi

Received: 30 January 2003

ZTFLH:

TG172.9

Corresponding Authors: Yuzhen Lin

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Xingling Tian; Yuzhen Lin; Jingjun Liu; Xingyue Yong. Electrochemical Behavior in Erosion- Corrosion of Carbon Steel in liquid-Solid Double Phase Flow Loop. J Chin Soc Corr Pro, 2004, 24(1): 48-51 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2004/V24/I1/48

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