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Investigation of corrosion behavior at elbow by array electrode and computational fluid dynamics simulation
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-04-14 , DOI: 10.1002/maco.201911373 Xiaodong Si 1 , Hongtao Si 2 , Manyi Li 2 , Rui Zhang 1 , Keyi Zhou 1
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-04-14 , DOI: 10.1002/maco.201911373 Xiaodong Si 1 , Hongtao Si 2 , Manyi Li 2 , Rui Zhang 1 , Keyi Zhou 1
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The present study focuses on the flow‐accelerated corrosion (FAC) behavior of A106Gr.B steel at 90° elbow by electrochemical measurement and computational fluid dynamics (CFD) simulation. The FAC rates under turbulent flows with a velocity of 3 and 1.5 m/s were measured by an array electrode technique in a loop system. The experimental results reveal that the maximum FAC rate appears at the extrados of 90° elbow, consistent with the locations from the rupture of the carbon steel piping in the worst cases at elbows. In addition, an effective mass transfer coefficient in consideration of the geometric factor was used to evaluate the FAC rate at intrados and extrados of the 90° elbow by CFD simulation. The predicted results are in good agreement with the experimental values.
中文翻译：
阵列电极在弯头腐蚀行为的研究及流体动力学模拟
本研究通过电化学测量和计算流体力学（CFD）模拟，重点研究了90°弯头处A106Gr.B钢的流动加速腐蚀（FAC）行为。在回路系统中，通过阵列电极技术测量了湍流下速度为3和1.5 m / s的FAC速率。实验结果表明，最大的FAC速率出现在90°弯头的弯曲处，这与弯头最坏情况下碳钢管道破裂的位置一致。另外，考虑几何因素，使用有效传质系数通过CFD模拟评估90°弯管内和外FAC率。预测结果与实验值吻合良好。
更新日期：2020-04-14
中文翻译：
阵列电极在弯头腐蚀行为的研究及流体动力学模拟
本研究通过电化学测量和计算流体力学（CFD）模拟，重点研究了90°弯头处A106Gr.B钢的流动加速腐蚀（FAC）行为。在回路系统中，通过阵列电极技术测量了湍流下速度为3和1.5 m / s的FAC速率。实验结果表明，最大的FAC速率出现在90°弯头的弯曲处，这与弯头最坏情况下碳钢管道破裂的位置一致。另外，考虑几何因素，使用有效传质系数通过CFD模拟评估90°弯管内和外FAC率。预测结果与实验值吻合良好。
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