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Effect of erosion speed on the interaction between erosion and corrosion of the Fe–3.5 wt% B alloy in a flowing zinc bath

Published online by Cambridge University Press:  17 March 2015

Yong Wang
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Jiandong Xing
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Shengqiang Ma*
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Guangzhu Liu
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Yaling He
Affiliation:
MOE Key Laboratory of Thermo-Fluid Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Sen Jia
Affiliation:
State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi'an, Shaanxi Province 710049, People's Republic of China
Yaping Bai
Affiliation:
School of Materials and Chemical Engineering, Xi’an Technological University, Xi'an, Shaanxi Province 710021, People's Republic of China
*
a)Address all correspondence to this author. e-mail: sqma@mail.xjtu.edu.cn
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Abstract

The effect of erosion speed on the interaction between erosion and corrosion of the Fe–3.5 wt% B alloy in a flowing zinc bath has been investigated using a rotating-disk technique. The total erosion–corrosion rate increases rapidly, whereas the pure erosion rate tends to increase linearly with an increase in erosion speed and with low damage. The increase in total erosion–corrosion rate is strongly dependent on erosion–corrosion interaction. During the erosion–corrosion process, the severe corrosion reaction roughens the surface by forming a loose corrosion layer and cracks in the anticaustic Fe2B skeleton, which eventually facilitates erosion. The micromechanical scouring effect of liquid zinc worsens corrosion by accelerating the removal of corrosion products and causing spallation of anticaustic Fe2B. An increase in erosion speed intensifies the micromechanical scouring effect of flowing zinc significantly. A strong erosion–corrosion interaction occurs at high erosion speed, which leads to a greater material loss rate.

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Articles
Copyright
Copyright © Materials Research Society 2015 

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