Corrosion resistance of a superhydrophobic polypropylene coating on magnesium alloy AZ31

被引:4
作者
Zhang, Shengjian [1 ]
Li, Min [1 ]
Li, Baoyi [1 ]
Zhao, Hansen [1 ]
Wang, Feng [1 ]
机构
[1] Taiyuan Inst Technol, Dept Chem & Chem Engn, Taiyuan, Peoples R China
关键词
Corrosion resistance; Magnesium alloy; Superhydrophobic; Dodecyltrimethoxysilane; Polypropy; ONE-STEP FABRICATION; MALEIC-ANHYDRIDE; SURFACES; ALUMINUM; PERFORMANCE; IMPROVEMENT; BEHAVIOR; SHEET;
D O I
10.1108/ACMM-03-2024-2989
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
PurposeTo improve the corrosion resistance of magnesium alloys, the construction of protective coatings is necessary to extend the service life of Mg-based materials.Design/methodology/approachSiO2 nanoparticles modified by dodecyltrimethoxysilane (DTMS) were added to the PP and a superhydrophobic Mg(OH)2/PP-60mSiO2 composite coating was fabricated on the surface of AZ31 magnesium alloy via the hydrothermal method and subsequently the immersion treatment.FindingsHydrophilic SiO2 nanoparticles become hydrophobic after modified by DTMS, showing a higher dispersibility in xylene. By incorporating modified SiO2 nanoparticles into the composite PP coating, the hydrophobicity of the layer was enhanced, resulting in a contact angle of 166.3 degrees and a sliding angle of 3.4 degrees. It also improved the water repellency and durability of the coating. Furthermore, the intermediate layer of Mg(OH)2 significantly strengthened the bond between the PP layer and the substrate. The Mg(OH)2/PP-60mSiO2 composite coating significantly enhances the corrosion resistance of the magnesium alloy by effectively blocking the infiltration of the corrosion anions during corrosion. The corrosion current density of the Mg(OH)2/PP-60mSiO2 composite coating is approximately 8.23 x 10-9 A<middle dot>cm-2, which can achieve a magnitude three times lower than its substrate, making it a promising surface modification for the Mg alloy.Originality/valueThe composite coating effectively and durably enhances the corrosion resistance of magnesium alloys.
引用
收藏
页码:543 / 554
页数:12
相关论文
共 43 条
[1]   Conversion coating on magnesium alloy sheet (AZ31) by vanillic acid treatment: Preparation, characterization and corrosion behavior [J].
Abatti, Guilherme Pazini ;
Nunes Pires, Alfredo T. ;
Spinelli, Almir ;
Scharnagl, Nico ;
da Conceicao, Thiago F. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 738 :224-232
[2]   A green one-step fabrication of superhydrophobic metallic surfaces of aluminum and zinc [J].
Chen, Chen ;
Yang, Siyu ;
Liu, Luyan ;
Xie, Hua ;
Liu, Huan ;
Zhu, Lixin ;
Xu, Xiaoliang .
JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 711 :506-513
[3]   Improvement of corrosion performance of MAO coated AZ31 magnesium alloy by polypropylene post-treatment [J].
Chen, M. -A. ;
Xiao, C. ;
Li, J. -M. .
TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING, 2013, 91 (02) :80-87
[4]   Mechanism of adhesion promotion between aluminium sheet and polypropylene with maleic anhydride-grafted polypropylene by γ-aminopropyltriethoxy silane [J].
Chen, Ming-An ;
Zhang, Xin-Ming ;
Huang, Rong ;
Lu, Xue-Bin .
SURFACE AND INTERFACE ANALYSIS, 2008, 40 (08) :1209-1218
[5]   Improvement of shear strength of aluminium-polypropylene lap joints by grafting maleic anhydride onto polypropylene [J].
Chen, Ming-An ;
Li, Hui-Zhong ;
Zhang, Xin-Ming .
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, 2007, 27 (03) :175-187
[6]   Mechanical properties and thermal stability of ambient-cured thick polysiloxane coatings prepared by a sot-gel process of organoalkoxysilanes [J].
Chen, Xiaobing ;
Zhou, Shuxue ;
You, Bo ;
Wu, Limin .
PROGRESS IN ORGANIC COATINGS, 2012, 74 (03) :540-548
[7]   Superhydrophobic composite coating with active corrosion resistance for AZ31B magnesium alloy protection [J].
Ding, Chendi ;
Tai, Yu ;
Wang, Dong ;
Tan, Linghua ;
Fu, Jiajun .
CHEMICAL ENGINEERING JOURNAL, 2019, 357 :518-532
[8]   Exfoliation corrosion of extruded Mg-Li-Ca alloy [J].
Ding, Zi-You ;
Cui, Lan-Yue ;
Zeng, Rong-Chang ;
Zhao, Yan-Bin ;
Guan, Shao-Kang ;
Xu, Dao-Kui ;
Lin, Cun-Guo .
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2018, 34 (09) :1550-1557
[9]   Fabrication of two biomimetic superhydrophobic polymeric surfaces [J].
Fan, Z. P. ;
Liu, W. L. ;
Wei, Z. J. ;
Yao, J. S. ;
Sun, X. L. ;
Li, M. ;
Wang, X. Q. .
APPLIED SURFACE SCIENCE, 2011, 257 (09) :4296-4301
[10]   One-step hydrothermal process to fabricate superhydrophobic surface on magnesium alloy with enhanced corrosion resistance and self-cleaning performance [J].
Feng, Libang ;
Zhu, Yali ;
Wang, Jing ;
Shi, Xueting .
APPLIED SURFACE SCIENCE, 2017, 422 :566-573