Innovative approach to boosting the chemical stability of AZ31 magnesium alloy using polymer-modified hybrid metal oxides  

作　　者：Mosab Kaseem Ananda Repycha Safira Mohammad Aadil Tehseen Zehra Muhammad Ali Khan Arash Fattah-alhosseini 

机构地区：[1]Corrosion and Electrochemistry Laboratory,Department of Nanotechnology and Advanced Materials Engineering,Sejong University,Seoul 05006,Republic of Korea [2]Department of Materials Engineering,Bu-Ali Sina University,Hamedan 65178-38695,Iran

出　　处：《Journal of Magnesium and Alloys》2024年第3期1068-1081,共14页镁合金学报（英文）

基　　金：supported by the National Research Foundation of Korea(NRF)funded by the Korean government(MSIT)(no.2022R1A2C1006743)。

摘　　要：Meeting the demands of complex and advanced applications requires the development of high-performance hybrid materials with unique properties.However,the integration of polymeric frameworks with MgO/WO_(3) composite layers faces challenges due to the lack of understanding of the formation mechanism and the challenge of determining the impact of self-assembled architecture on anticorrosive properties.In this study,we aimed to enhance the corrosion resistance of the MgO layer produced by plasma electrolysis(PE)of AZ31 Mg alloy by incorporating WO_(3) with partially phosphorated poly(vinyl alcohol)(PPVA).Two types of porous MgO layers were produced using the PE process with an alkaline-phosphate electrolyte,one with and one without WO_(3) nanoparticles,which were subsequently immersed in an aqueous solution of PPVA.Incorporating PPVA into the WO_(3)-MgO layer resulted in hybrids being deposited in a fragmented manner,creating a“laminar reef-like structure”that sealed most of the structural defects in the layer.The PPVA-sealed WO_(3)-based coating exhibited superior corrosion resistance compared to the other samples.Computational analyses were employed to explore the mechanism underlying the formation of PPVA/WO_(3) hybrids on the MgO layer.These findings suggest that PPVA-WO_(3)-MgO hybrid coatings can potentially improve corrosion resistance in various fields.

关 键 词：Plasma electrolysis Poly(vinyl alcohol) Tungsten trioxide SEALING CORROSION DFT. 

分 类 号：TG146.22[一般工业技术—材料科学与工程]