中文摘要：

应用电化学和浸泡实验对比20钢与08碳钢在模拟循环冷却水中的耐蚀性，从实验结果得出08碳钢的耐蚀性能比20钢优异；由于在冷却水循环过程中金属表面形成的水膜层逐渐增厚可能使氯离子等侵蚀性离子积聚在表层难以扩散出去，导致腐蚀现象越来越严重，08碳钢中Cr含量比20钢高可能是08钢更耐蚀的原因之一。

英文摘要：

Evaluated and compared with the corrosion resistance of 20 ＆ 08 carbon steels by electrochemical and immersion experiments. It can be seen that the corrosion resistance of 08 carbon steel is greater than 20 carbon steel from the experiment results. More and more Cl- which properly accumulated on the surface of pipeline and hard to diffuse from the steel when the water layer formed on the surface of metal become thicker, and then corrosion problem got worse. The content of Cr in 08 carbon steel is higher than 20 carbon steel which is properly reason why the corrosion resistance of 08 carbon steel is better than 20 carbon steel