采用电化学测试和浸泡试验研究了J55碳钢在不同流速质量分数为3.5% NaCl溶液中的腐蚀行为, 分析了流动速率(0,0.5,1 m·s-1)对其腐蚀行为的影响及相关机理。结果表明: NaCl溶液流动使该钢的开路电位和自腐蚀电位正移, 自腐蚀电流密度增加, 双电层的极化电阻降低; 溶液流动对阳极溶解的机制没有明显的影响, 但提高了阴极反应的Tafel斜率; 在流速为1 m·s-1的溶液中, J55碳钢的平均腐蚀速率比在静止溶液中的显著增大, 并促进了局部腐蚀的发生; 溶液流动促进了阴极离子的传递过程, 减小了腐蚀产物膜的电阻。
所属栏目
试验研究王荣(1962-), 男, 陕西礼泉人, 教授, 博士。
收稿日期
2014/3/252015/1/29
作者单位
王荣:西安石油大学材料科学与工程学院, 西安 710065
董昭:西安石油大学材料科学与工程学院, 西安 710065
雒设计:西安石油大学材料科学与工程学院, 西安 710065
许天旱:西安石油大学材料科学与工程学院, 西安 710065
引用该论文:
WANG Rong,DONG Zhao,LUO She-ji,XU Tian-han.Corrosion Behavior of J55 Carbon Steel in NaCl Solution at Different Flow Velocities[J].Materials for mechancial engineering,2015,39(4):29～34
王荣,董昭,雒设计,许天旱.J55碳钢在不同流速NaCl溶液中的腐蚀行为[J].机械工程材料,2015,39(4):29～34
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