Enhanced Corrosion Resistance of AZ31 Mg Alloy by One-step Formation of PEO / Mg-Al LDH Composite Coating

Xinxin Zhang; Yupeng  Zhang; You Lv; Zehua  Dong; Teruo Hashimoto; Xiaorong Zhou

Enhanced Corrosion Resistance of AZ31 Mg Alloy by One-step Formation of PEO / Mg-Al LDH Composite Coating

Xinxin Zhang, Yupeng Zhang, You Lv, Zehua Dong, Teruo Hashimoto, Xiaorong Zhou

Research output: Contribution to journal › Article › peer-review

Abstract

In the present work, a novel one-step plasma electrolytic oxidation (PEO) method is developed for the formation of PEO/Mg-Al layered double hydroxide (LDH) composite coating on AZ31 Mg alloy. Through the control of electrolyte concentration, a Mg-Al LDH layer was formed on the surface of the resultant PEO coating. The corrosion properties of the composite coating were evaluated by electrochemical analysis, hydrogen evolution measurement and salt spraying testing, which exhibited improved corrosion resistance due to the presence of the Mg-Al LDH layer. This work provides a new strategy to take advantage of alloying elements in Mg alloys in PEO treatment to enhance corrosion resistance.

Keywords: AZ31 Mg alloy; Plasma electrolytic oxidation; Layered double hydroxide; Corrosion resistance

Original language	English
Journal	Corrosion Communications
Publication status	Accepted/In press - 17 May 2022

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title = "Enhanced Corrosion Resistance of AZ31 Mg Alloy by One-step Formation of PEO / Mg-Al LDH Composite Coating",

abstract = "In the present work, a novel one-step plasma electrolytic oxidation (PEO) method is developed for the formation of PEO/Mg-Al layered double hydroxide (LDH) composite coating on AZ31 Mg alloy. Through the control of electrolyte concentration, a Mg-Al LDH layer was formed on the surface of the resultant PEO coating. The corrosion properties of the composite coating were evaluated by electrochemical analysis, hydrogen evolution measurement and salt spraying testing, which exhibited improved corrosion resistance due to the presence of the Mg-Al LDH layer. This work provides a new strategy to take advantage of alloying elements in Mg alloys in PEO treatment to enhance corrosion resistance.Keywords: AZ31 Mg alloy; Plasma electrolytic oxidation; Layered double hydroxide; Corrosion resistance",

author = "Xinxin Zhang and Yupeng Zhang and You Lv and Zehua Dong and Teruo Hashimoto and Xiaorong Zhou",

year = "2022",

month = may,

day = "17",

language = "English",

journal = "Corrosion Communications",

issn = "2667-2669",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Enhanced Corrosion Resistance of AZ31 Mg Alloy by One-step Formation of PEO / Mg-Al LDH Composite Coating

AU - Zhang, Xinxin

AU - Zhang, Yupeng

AU - Lv, You

AU - Dong, Zehua

AU - Hashimoto, Teruo

AU - Zhou, Xiaorong

PY - 2022/5/17

Y1 - 2022/5/17

N2 - In the present work, a novel one-step plasma electrolytic oxidation (PEO) method is developed for the formation of PEO/Mg-Al layered double hydroxide (LDH) composite coating on AZ31 Mg alloy. Through the control of electrolyte concentration, a Mg-Al LDH layer was formed on the surface of the resultant PEO coating. The corrosion properties of the composite coating were evaluated by electrochemical analysis, hydrogen evolution measurement and salt spraying testing, which exhibited improved corrosion resistance due to the presence of the Mg-Al LDH layer. This work provides a new strategy to take advantage of alloying elements in Mg alloys in PEO treatment to enhance corrosion resistance.Keywords: AZ31 Mg alloy; Plasma electrolytic oxidation; Layered double hydroxide; Corrosion resistance

AB - In the present work, a novel one-step plasma electrolytic oxidation (PEO) method is developed for the formation of PEO/Mg-Al layered double hydroxide (LDH) composite coating on AZ31 Mg alloy. Through the control of electrolyte concentration, a Mg-Al LDH layer was formed on the surface of the resultant PEO coating. The corrosion properties of the composite coating were evaluated by electrochemical analysis, hydrogen evolution measurement and salt spraying testing, which exhibited improved corrosion resistance due to the presence of the Mg-Al LDH layer. This work provides a new strategy to take advantage of alloying elements in Mg alloys in PEO treatment to enhance corrosion resistance.Keywords: AZ31 Mg alloy; Plasma electrolytic oxidation; Layered double hydroxide; Corrosion resistance

M3 - Article

SN - 2667-2669

JO - Corrosion Communications

JF - Corrosion Communications

ER -

Enhanced Corrosion Resistance of AZ31 Mg Alloy by One-step Formation of PEO / Mg-Al LDH Composite Coating

Abstract

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