Formation of carbon and oxygen rich surface layer on high purity magnesium by atmospheric carbon dioxide plasma

Gyoung G. Jang; Sinchul Yeom; Jong K. Keum; Mina Yoon; Harry Meyer; Yi Feng Su; Jiheon Jun

doi:10.1016/j.jma.2022.10.008

Formation of carbon and oxygen rich surface layer on high purity magnesium by atmospheric carbon dioxide plasma

Gyoung G. Jang, Sinchul Yeom, Jong K. Keum, Mina Yoon, Harry Meyer, Yi Feng Su, Jiheon Jun

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

5 Scopus citations

Abstract

Carbon and oxygen-rich corrosion barrier layer formed on Mg by a simple and scalable CO₂ atmospheric plasma (CO₂-AP) process. The reactive CO₂-AP interacts with the Mg surface and forms a unique layered structure with the top MgCO₃/MgO-intermixed particulates pillars and the bottom dense layer. The surface features were simultaneously formed on the nano-/micro-structured MgO layer by carbonate molecules, plasma-active CO₂ molecules, and/or other volatile organic compounds on the nano-/micro-structured MgO particle layer. The resulting surfaces after CO₂-AP were either hydrophobic or hydrophilic and exhibited lower anodic current or high resistance for Mg corrosion. For the hydrophobic surfaces of CO₂-AP treated Mg, molecular dynamic simulations were performed to understand the origin of hydrophobicity and identified that the amorphous carbon layers formed on the Mg surface are the source. The environmentally benign abundant-gas-based process enables the cost reduction associated with waste treatment, generation of by-product, and supply of raw material.

Original language	English
Pages (from-to)	88-99
Number of pages	12
Journal	Journal of Magnesium and Alloys
Volume	11
Issue number	1
DOIs	https://doi.org/10.1016/j.jma.2022.10.008
State	Published - Jan 2023

Funding

This work was supported by the US Department of Energy's (DOE's) Office of Energy Efficiency and Renewable Energy, Vehicle Technology Office, Powertrain Materials Core and Light Metals Core Programs. Sample characterization is also partially supported by the Technology Commercialization Fund Fiscal Year 2020 of DOE's Office of Technology Transitions and by the Creative Materials Discovery Program through the National Research Foundation of Korea, with computational modeling of amorphous carbons funded by the Ministry of Science, ICT and Future Planning (NRF-2016M3D1A1919181). The research was conducted at ORNL, which is managed by UT Battelle LLC for DOE under contract DE-AC05-00OR22725. Computational modeling and part of the materials characterization (SEM and XRD) were performed at the Center for Nanophase Materials Sciences (proposal ID: CNMS 2021-A-00626), which is sponsored at ORNL by DOE's Scientific User Facilities Division. This research used resources of the Oak Ridge Leadership Computing Facility and the National Energy Research Scientific Computing Center, which are DOE Office of Science user facilities. Peter Yancey (Atmospheric Plasma Solutions, 11301 Penny Road, Cary, NC 27518, United States) provided significant technical support and supervised the production of plasma-treated Mg samples.

Funders	Funder number
Office of Energy Efficiency and Renewable Energy, Vehicle Technology Office
Powertrain Materials Core and Light Metals Core Programs
U.S. Department of Energy

Keywords

Atmospheric plasma
Corrosion protection
Magnesium
Surface modification

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jma.2022.10.008

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title = "Formation of carbon and oxygen rich surface layer on high purity magnesium by atmospheric carbon dioxide plasma",

abstract = "Carbon and oxygen-rich corrosion barrier layer formed on Mg by a simple and scalable CO2 atmospheric plasma (CO2-AP) process. The reactive CO2-AP interacts with the Mg surface and forms a unique layered structure with the top MgCO3/MgO-intermixed particulates pillars and the bottom dense layer. The surface features were simultaneously formed on the nano-/micro-structured MgO layer by carbonate molecules, plasma-active CO2 molecules, and/or other volatile organic compounds on the nano-/micro-structured MgO particle layer. The resulting surfaces after CO2-AP were either hydrophobic or hydrophilic and exhibited lower anodic current or high resistance for Mg corrosion. For the hydrophobic surfaces of CO2-AP treated Mg, molecular dynamic simulations were performed to understand the origin of hydrophobicity and identified that the amorphous carbon layers formed on the Mg surface are the source. The environmentally benign abundant-gas-based process enables the cost reduction associated with waste treatment, generation of by-product, and supply of raw material.",

keywords = "Atmospheric plasma, Corrosion protection, Magnesium, Surface modification",

author = "Jang, {Gyoung G.} and Sinchul Yeom and Keum, {Jong K.} and Mina Yoon and Harry Meyer and Su, {Yi Feng} and Jiheon Jun",

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year = "2023",

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doi = "10.1016/j.jma.2022.10.008",

language = "English",

volume = "11",

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AU - Jang, Gyoung G.

AU - Yeom, Sinchul

AU - Keum, Jong K.

AU - Yoon, Mina

AU - Meyer, Harry

AU - Su, Yi Feng

AU - Jun, Jiheon

PY - 2023/1

Y1 - 2023/1

N2 - Carbon and oxygen-rich corrosion barrier layer formed on Mg by a simple and scalable CO2 atmospheric plasma (CO2-AP) process. The reactive CO2-AP interacts with the Mg surface and forms a unique layered structure with the top MgCO3/MgO-intermixed particulates pillars and the bottom dense layer. The surface features were simultaneously formed on the nano-/micro-structured MgO layer by carbonate molecules, plasma-active CO2 molecules, and/or other volatile organic compounds on the nano-/micro-structured MgO particle layer. The resulting surfaces after CO2-AP were either hydrophobic or hydrophilic and exhibited lower anodic current or high resistance for Mg corrosion. For the hydrophobic surfaces of CO2-AP treated Mg, molecular dynamic simulations were performed to understand the origin of hydrophobicity and identified that the amorphous carbon layers formed on the Mg surface are the source. The environmentally benign abundant-gas-based process enables the cost reduction associated with waste treatment, generation of by-product, and supply of raw material.

AB - Carbon and oxygen-rich corrosion barrier layer formed on Mg by a simple and scalable CO2 atmospheric plasma (CO2-AP) process. The reactive CO2-AP interacts with the Mg surface and forms a unique layered structure with the top MgCO3/MgO-intermixed particulates pillars and the bottom dense layer. The surface features were simultaneously formed on the nano-/micro-structured MgO layer by carbonate molecules, plasma-active CO2 molecules, and/or other volatile organic compounds on the nano-/micro-structured MgO particle layer. The resulting surfaces after CO2-AP were either hydrophobic or hydrophilic and exhibited lower anodic current or high resistance for Mg corrosion. For the hydrophobic surfaces of CO2-AP treated Mg, molecular dynamic simulations were performed to understand the origin of hydrophobicity and identified that the amorphous carbon layers formed on the Mg surface are the source. The environmentally benign abundant-gas-based process enables the cost reduction associated with waste treatment, generation of by-product, and supply of raw material.

KW - Atmospheric plasma

KW - Corrosion protection

KW - Magnesium

KW - Surface modification

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ER -

Formation of carbon and oxygen rich surface layer on high purity magnesium by atmospheric carbon dioxide plasma

Abstract

Funding

Keywords

UN SDGs

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