ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 26    No. 11    November 2016

Effect of flow velocity on corrosion behavior of AZ91D magnesium alloy at elbow of loop system
Jing TIAN1, Hua-liang HUANG1,2, Zhi-quan PAN1, Hong ZHOU1
(1. School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430073, China;
2. School of Chemistry and Chemical Engineering,
Huazhong University of Science and Technology, Wuhan 430074, China
)
Abstract: A loop system was used to investigate the effect of flow velocity on corrosion behavior of AZ91D magnesium alloy at an elbow of loop system based on array electrode technology by polarization, computational fluid dynamics (CFD) simulation and surface analysis. The experimental results showed that the corrosion rate increased with increasing flow velocity, and a critical flow velocity could exist in the corrosion of AZ91D magnesium alloy. When flow velocity exceeded the critical flow velocity, fluid hydrodynamics was dominant in the corrosion of AZ91D magnesium alloy. On the contrary, the electrochemical factors were dominant.
Key words: magnesium alloy; flow velocity; elbow; computational fluid dynamics (CFD); polarization
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU)