首页|Achieving ultra-high corrosion-resistant Mg-Zn-Sc alloys by forming Sc-assisted protective corrosion product film

Achieving ultra-high corrosion-resistant Mg-Zn-Sc alloys by forming Sc-assisted protective corrosion product film

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The weak corrosion resistance of magnesium and its alloys greatly limited the industrial application.Though functional self-healing coatings have been proposed as countermeasures,repeated damages on coatings under practical installation and complex external environments could require self-adaptive cor-rosion protection against multiple abrasions.In this study,an ultra-high corrosion-resistant Mg-1Zn-1Sc(wt.％)alloy with a corrosion rate of 0.087 mm/y has been designed and prepared,which has fine grains and uniform structure of a nano-scale ScZn phase with low potential.A unique and dense corrosion prod-uct film with a three-layered structure was found and studied on Mg-1Zn-1Sc alloy,providing excellent corrosion protection.In addition,the formation and protection mechanisms of the three-layered corrosion product film on Mg-1Zn-1Sc alloy have been discussed and proposed.The growth behavior of protective corrosion product film could be driven by the synergy of Sc and Zn elements.Furthermore,with the in-crease of Sc content,the strength,plasticity,and corrosion resistance of Mg-1Zn-xSc(x=0,0.2,0.6,1.0,in wt.％)alloys increased simultaneously.The high corrosion resistance and moderate mechanical perfor-mance qualify Mg-1Zn-1Sc alloy as a promising candidate for diverse industrial applications.

High corrosion resistanceMechanical performanceMg-Zn-Sc alloyCorrosion product filmThree-layer structureSKPFM

Wenjun Ci、Xianhua Chen、Xu Dai、Chunquan Liu、Yanlong Ma、Di Zhao、Fusheng Pan

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College of Materials Science and Engineering,Chongqing University,Chongqing 400045,China

National Engineering Research Center for Magnesium Alloys,Chongqing University,Chongqing 400045,China

State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400044,China

College of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China

School of Mechanical Engineering,Suzhou University of Science and Technology,Suzhou 215009,China

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国家自然科学基金国家自然科学基金国家重点研发计划Guangdong Major Project of Basic and Applied Basic Research中央高校基本科研业务费专项

52225101521711032021YFB37011002020B03010300062020CDJDPT001

2024

10.1016/j.jmst.2023.08.068

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.181(14)
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