Open AccessA novel approach to improve corrosion resistance of Mg alloy by co-extrusion
Author(s) -
Bo Feng,
Changjian Yan,
Xiaowei Feng,
Juan Wang,
Kan Zheng
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abbe41
Subject(s) - extrusion , alloy , corrosion , materials science , microstructure , 6111 aluminium alloy , metallurgy , texture (cosmology) , magnesium alloy , 6063 aluminium alloy , core (optical fiber) , 5005 aluminium alloy , alonizing , composite number , composite material , artificial intelligence , computer science , image (mathematics)
In this study, Mg/Al composite rod with a thin 6082 aluminum alloy coated AZ31 magnesium alloy was successfully prepared by co-extrusion. Microstructure and texture of the extruded Mg/Al rod were systemically studied. A comparative study about electrochemical behavior of the Mg core and the Al sleeve was also addressed. Our results show that, co-extrusion can greatly refine grains of Mg alloy, but does not change the texture component. The 6082 sleeve exhibits a much better corrosion resistance than the AZ31 core. This study provided a novel approach to improve corrosion resistance of Mg alloy. The Al sleeve served as a barrier to protect the Mg alloy from corrosion.