Flow-induced corrosion of absorbable magnesium alloy: In-situ and real-time electrochemical study
By Juan Wang and Yongseok Jang and Guojiang Wan and Venkataraman Giridharan and Guang-Ling Song and Zhigang Xu and Youngmi Koo and Pengkai Qi and Jagannathan Sankar and Nan Huang and Yeoheung Yun
Published in Corrosion Science
NULL
2016
Abstract
An in-situ and real-time electrochemical study in a vascular bioreactor was designed to analyze corrosion mechanism of magnesium alloy (MgZnCa) under mimetic hydrodynamic conditions. Effect of hydrodynamics on corrosion kinetics, types, rates and products was analyzed. Flow-induced shear stress (FISS) accelerated mass and electron transfer, leading to an increase in uniform and localized corrosions. \FISS\ increased the thickness of uniform corrosion layer, but filiform corrosion decreased this layer resistance at high \FISS\ conditions. \FISS\ also increased the removal rate of localized corrosion products. Impedance-estimated and linear polarization-measured polarization resistances provided a consistent correlation to corrosion rate calculated by computed tomography.
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