20钢与08碳钢的循环水腐蚀行为评价对比

中国腐蚀与防护学报, 2011, 31(4): 289-293.

20钢与08碳钢的循环水腐蚀行为评价对比

刘佐嘉 ^1, , 程学群 ^2, , 吕胜杰 ^3, , 李晓刚 ^4,

1.北京科技大学腐蚀与防护中心,北京100083

2.北京科技大学腐蚀与防护中心,北京100083

3.中国石油化工股份有限公司石家庄炼化分公司机动处,石家庄050032

4.北京科技大学腐蚀与防护中心,北京100083

基金项目: 国家自然科学基金(50871020)

关键词：极化 , 电化学阻抗 , 浸泡 , 20碳钢 , 08碳钢

EVALUATION AND COMPARISON OF CORROSION BEHAVIOR ON 20 ＆ 08 CARBON STEELS IN SIMULATED CIRCULATING COOLING WATER

Keywords： polarization , electrochemical impedance spectroscopy（EIS） , immersion , 20 carbonsteel , 08 carbon steel

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。

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

参考文献

[1]	S. Giddey;B. Cherry;F. Lawson .Stability of oxide films formed on mild steel in turbulent flow conditions of alkaline solutions at elevated temperatures[J].Corrosion Science,2001(8):1497-1517.

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