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Studies on waterline corrosion processes and corrosion product characteristics of carbon steel in 3.5 wt% NaCl solution
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-10-21 , DOI: 10.1002/maco.202012064 Chuanpeng Li 1 , Lunwu Zhang 2 , Zhonghai Lu 1 , Rui Ding 3 , Xiaodong Zhao 3 , Bin Wang 4 , Hongtao Cui 1 , Jie Liu 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-10-21 , DOI: 10.1002/maco.202012064 Chuanpeng Li 1 , Lunwu Zhang 2 , Zhonghai Lu 1 , Rui Ding 3 , Xiaodong Zhao 3 , Bin Wang 4 , Hongtao Cui 1 , Jie Liu 1
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The waterline corrosion behaviors of carbon steel partially immersed in a 3.5 wt% NaCl solution were investigated using the wire beam electrode technique, and the effects of corrosion products on the processes of waterline corrosion were analyzed. The results demonstrated that the initial stage and development stage of waterline corrosion were mainly controlled by the concentration and diffusion of dissolved oxygen, respectively, and the deceleration stage of waterline corrosion was mainly affected by corrosion products. The main component of the yellow corrosion products was γ‐FeOOH, and γ‐FeOOH that exhibited a high reduction reactivity could be involved in the cathodic reaction. The black corrosion products were mainly composed of Fe3O4 with strong thermodynamic stability and the processes of dissolved oxygen diffusion and ion transports were obviously affected due to the continuous accumulation of Fe3O4 on the surface of the electrodes. Polarity reversals were observed on the single electrodes below the waterline, but the reasons for the phenomena were different from each other.
中文翻译：
碳钢在3.5 wt％NaCl溶液中的水线腐蚀过程和腐蚀产物特性的研究
利用线束电极技术研究了部分浸在3.5 wt％NaCl溶液中的碳钢的水线腐蚀行为，并分析了腐蚀产物对水线腐蚀过程的影响。结果表明，水线腐蚀的初始阶段和发展阶段主要受溶解氧的浓度和扩散控制，水线腐蚀的减速阶段主要受腐蚀产物的影响。黄色腐蚀产物的主要成分是γ-FeOOH，表现出高还原反应性的γ-FeOOH可能参与阴极反应。黑色腐蚀产物主要由Fe 3 O 4组成Fe 3 O 4在电极表面的连续积累，对热力学稳定性很强，溶解氧的扩散和离子迁移过程产生了明显的影响。在水线以下的单个电极上观察到极性反转，但现象的原因彼此不同。
更新日期：2020-10-21
中文翻译：
碳钢在3.5 wt％NaCl溶液中的水线腐蚀过程和腐蚀产物特性的研究
利用线束电极技术研究了部分浸在3.5 wt％NaCl溶液中的碳钢的水线腐蚀行为，并分析了腐蚀产物对水线腐蚀过程的影响。结果表明，水线腐蚀的初始阶段和发展阶段主要受溶解氧的浓度和扩散控制，水线腐蚀的减速阶段主要受腐蚀产物的影响。黄色腐蚀产物的主要成分是γ-FeOOH，表现出高还原反应性的γ-FeOOH可能参与阴极反应。黑色腐蚀产物主要由Fe 3 O 4组成Fe 3 O 4在电极表面的连续积累，对热力学稳定性很强，溶解氧的扩散和离子迁移过程产生了明显的影响。在水线以下的单个电极上观察到极性反转，但现象的原因彼此不同。
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