EFFECT OF SO2 ON CORROSION EVOLUTION OF Q235B STEEL IN SIMULATED COASTAL- INDUSTRIAL ATMOSPHERE
Received date: 2013-11-15
Revised date: 2014-03-13
Online published: 2014-07-20
Supported by
Supported by National Natural Science Foundation of China (Nos.51201170 and 51131007)
采用循环干/湿模拟腐蚀增重实验、动电位极化曲线、电化学阻抗谱和XRD方法, 研究了模拟海岸-工业大气中SO2对Q235B钢腐蚀行为的影响. 结果表明, 在腐蚀初期SO2抑制了Q235B钢的腐蚀; 在腐蚀后期, SO2促进了Q235B钢的腐蚀. 当SO2的浓度较低时, 腐蚀速率随SO2浓度的升高而增大; 当SO2的浓度较高时, 腐蚀速率随SO2浓度的升高而减小. 工业-海岸大气中的SO2组分可以抑制腐蚀产物中g -FeOOH和b -FeOOH的生成, 而促进a -FeOOH生成. 低碳钢腐蚀速率随SO2浓度变化出现的极值现象与SO2导致的锈层相组分变化密切相关.
Wenjuan CHEN , Long HAO , Junhua DONG , Wei KE , Huailiang WEN . EFFECT OF SO2 ON CORROSION EVOLUTION OF Q235B STEEL IN SIMULATED COASTAL- INDUSTRIAL ATMOSPHERE[J]. Acta Metall Sin, 2014 , 50(7) : 802 -810 . DOI: 10.3724/SP.J.1037.2013.00738
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