Hydrophobic epoxy resin coating with ionic liquid conversion pretreatment on magnesium alloy for promoting corrosion resistance

被引：72
作者：
Guo, Liting [1 ,2 ]
Gu, Changdong [1 ,2 ]
Feng, Jie [3 ]
Guo, Yongbin [4 ]
Jin, Yuan [4 ]
Tu, Jiangping [1 ,2 ]
机构：
[1] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China
[2] Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Zhejiang, Peoples R China
[3] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Zhejiang, Peoples R China
[4] Zotye Automobile Co Ltd, Hangzhou 310018, Zhejiang, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2020年 / 37卷
关键词：
Mg alloy; Deep eutectic solvent; Corrosion resistance; Double layered hybrid coating; DEEP EUTECTIC SOLVENTS; ELECTROLYTIC OXIDATION COATINGS; MG ALLOY; SUPERHYDROPHOBIC SURFACE; WATER-ABSORPTION; FILM FORMATION; PROTECTION; FABRICATION; MICROSTRUCTURE; MECHANISM;
D O I：
10.1016/j.jmst.2019.06.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A hydrophobic epoxy resin coating with an environmental-friendly deep eutectic solvent (DES)-based conversion pretreatment was proposed to enhance the corrosion resistance of magnesium alloys. The hydrophobic epoxy resin coatings on the AZ31B magnesium alloy with and without the DES-based conversion pretreatment were thoroughly compared. It is found that the DES-based conversion film on the AZ31B magnesium alloy is mainly composed of MgH2, MgO and MgCO3. Furthermore, the conversion film possesses porous structure, which provides more anchor points for the following epoxy resin coating. However, without the DES-conversion pretreatment, the epoxy resin is difficult to be attached on the substrate during the dip-coating process. The double layered hybrid coating system promotes the corrosion resistance of the magnesium alloys significantly, which can be ascribed to the unique architecture and component including the hydrophobicity of the surface layer, the dense and interlocked epoxy resin, and the corrosion resistant DES-based conversion pretreatment. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：9 / 18
页数：10
相关论文
共 61 条
[1]   Corrosion resistant hydrophobic coating using modified conducting polyaniline [J].
Adhikari, Arindam ;
Karpoormath, Rajshekhar ;
Radha, S. ;
Singh, Shammi Kumar ;
Mutthukannan, R. ;
Bharate, Gahininath ;
Vijayan, M. .
HIGH PERFORMANCE POLYMERS, 2018, 30 (02) :181-191
[2]   A photoelectrochemical investigation of conversion coatings on Mg substrates [J].
Anicai, L ;
Masi, R ;
Santamaria, M ;
Di Quarto, F .
CORROSION SCIENCE, 2005, 47 (12) :2883-2900
[3]   XPS and AFM investigations of annealing induced surface modifications of MgO single crystals [J].
Aswal, DK ;
Muthe, KP ;
Tawde, S ;
Chodhury, S ;
Bagkar, N ;
Singh, A ;
Gupta, SK ;
Yakhmi, JV .
JOURNAL OF CRYSTAL GROWTH, 2002, 236 (04) :661-666
[4]   Electrodeposition onto magnesium in air and water stable ionic liquids: From corrosion to successful plating [J].
Bakkar, A. ;
Neubert, V. .
ELECTROCHEMISTRY COMMUNICATIONS, 2007, 9 (09) :2428-2435
[5]   Anodizing treatments for magnesium alloys and their effecton corrosion resistance in various environments [J].
Blawert, Carsten ;
Dietzel, Wolfgang ;
Ghali, Edward ;
Song, Guangling .
ADVANCED ENGINEERING MATERIALS, 2006, 8 (06) :511-533
[6]   Water absorption in polyaminosiloxane-epoxy thermosetting polymers [J].
Cabanelas, JC ;
Prolongo, SG ;
Serrano, B ;
Bravo, J ;
Baselga, J .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2003, 143 :311-315
[7]  
Cao C., 2002, An Introduction to Electrochemical Impedance Spectroscopy, V1
[8]   Corrosion and passivation of magnesium alloys [J].
Cao, Fuyong ;
Song, Guang-Ling ;
Atrens, Andrej .
CORROSION SCIENCE, 2016, 111 :835-845
[9]   Review of Corrosion-Resistant Conversion Coatings for Magnesium and Its Alloys [J].
Chen, X. B. ;
Birbilis, N. ;
Abbott, T. B. .
CORROSION, 2011, 67 (03)
[10]   Efficient continuous synthesis of high purity deep eutectic solvents by twin screw extrusion [J].
Crawford, D. E. ;
Wright, L. A. ;
James, S. L. ;
Abbott, A. P. .
CHEMICAL COMMUNICATIONS, 2016, 52 (22) :4215-4218
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