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中文摘要：
建立了实验室模拟海水冲刷腐蚀测试系统，采用极化阻力和电化学阻抗谱（EIS）等测试技术，研究了模拟实海流速；中刷环境下3C钢的腐蚀电化学行为以及流速和泥沙含量对3C钢腐蚀行为的影响．结果表明：在模拟实海流速≤0．80m／s、泥沙质量分数≤1．50‰，时，3C铜在无泥沙和含泥沙海水中的EIS特征都为单一容抗弧；腐蚀电位随着流速的增加而升高，极化阻力则随流速的增加而减小，说明流速的增加加速了3C钢的腐蚀；泥沙含量的增加增大了表面冲刷作用，导致3C钢的腐蚀速率略有增大．
英文摘要：
A simulated erosion-corrosion test system has been set up,and the corrosion electrochemical behavior of 3C steel and the influence of velocity and different concentrations of sediment on the corrosion behavior have been studied under the simulated condition of erosion-corrosion using polarization resistance and electrochemical impedance spectroscopy （EIS） measurements. The results show that,as its EIS characteristics,3C steel has only one capacitive reactance arc in both clear seawater and seawater containing sediment when the simulated velocity is less than 0.80 m/s and mass fraction of sediment is less than 1.50‰, With the increase of velocity of seawater,corrosion potential of 3C steel rises and polarization resistance of 3C steel decreases,which indicates that the increase of velocity has accelerated the corrosion rate of 3C steel. With the increase of concentration of sediment,erosion-corrosion effect on the surfaces of metal materials is enhanced and corrosion rate of 3C steel is slightly increased.
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