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

作     者：Gyoung G.Jang Sinchul Yeom Jong K.Keum Mina Yoon Harry III Meyer Yi-Feng Su Jiheon Jun 

作者机构：Manufacturing Science DivisionOak Ridge National Laboratory(ORNL)One Bethel Valley RoadPO Box 2008MS6054Oak RidgeTN 37831United States Material Science and Technologies DivisionOak Ridge National Laboratory(ORNL)One Bethel Valley RoadOak RidgeTN 37831United States Neutron Scattering Division&Center for Nanophase Materials SciencesORNLOne Bethel Valley RoadOak RidgeTN 37831United States Chemical Sciences DivisionORNLOne Bethel Valley RoadOak RidgeTN 37831United States 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2023年第11卷第1期

页      面：88-99页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：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 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) 

主　　题：Atmospheric plasma Magnesium Corrosion protection Surface modification 

摘      要：Carbon and oxygen-rich corrosion barrier layer formed on Mg by a simple and scalable CO_(2) atmospheric plasma(CO_(2)-AP)*** reactive CO_(2)-AP interacts with the Mg surface and forms a unique layered structure with the top MgCO_(3)/MgO-intermixed particulates pillars and the bottom dense *** surface features were simultaneously formed on the nano-/micro-structured MgO layer by carbonate molecules,plasma-active CO_(2) molecules,and/or other volatile organic compounds on the nano-/micro-structured MgO particle *** resulting surfaces after CO_(2)-AP were either hydrophobic or hydrophilic and exhibited lower anodic current or high resistance for Mg *** the hydrophobic surfaces of CO_(2)-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 *** environmentally benign abundant-gas-based process enables the cost reduction associated with waste treatment,generation of by-product,and supply of raw material.