Effect of deposition sequence of MgAl-LDH and SiO2@PDMS layers on the corrosion resistance of robust superhydrophobic/self-healing multifunctional coatings on magnesium alloy

doi:10.1016/j.porgcoat.2022.107299

CQUET-IR

	Effect of deposition sequence of MgAl-LDH and SiO2@PDMS layers on the corrosion resistance of robust superhydrophobic/self-healing multifunctional coatings on magnesium alloy
	Tang, Yuan 1; Wu, Fang 1; Fang, Liang 1,2; Ruan, Haibo 3; Hu, Jia 1; Zeng, Xianguang 1,4; Zhang, Shufang 5; Luo, Haijun 1,6; Zhou, Miao 7
	2023
发表期刊	PROGRESS IN ORGANIC COATINGS
ISSN	0300-9440
EISSN	1873-331X
卷号	174
摘要	A multi-functional anti-corrosion coating integrating wear-resistant superhydrophobic(SH) and self-healing expected to provide effective protection for magnesium alloys. In this work, the SiO2@PDMS (SP) coating and cysteine-intercalated MgAl-LDH (CL) are respectively chosen as the wear-resistant SH and the self-healing anti-corrosion coating, then two kinds of bilayer coatings with different deposition sequences: SP/CL and CL/SP were obtained accordingly. The morphologies, compositions, structures, superhydrophobic properties, wear resistance, corrosion resistance and self-healing properties of these two coatings were investigated. SEM re-sults show small SiO2 particles and large SiO2 particles intermingle to form a micro-nano structure on the SP/CL coating surface. While in the CL/SP coating, MgAl-Cys-LDH nanosheets are dispersed and grown in the gaps between SiO2 particles and on the surface of the magnesium substrate. Besides, their wear resistance is excellent, with the contact angles remaining at a high level (149.9 degrees and 149.8 degrees) after 50 cycles of sandpaper abrasion. Electrochemical tests indicate the corrosion resistance of CL/SP coating is better than that of SP/CL coating. It mainly ascribed to the much denser CL/SP coating and the better adhesion between the SP and CL layers. A large number of CL nanosheets growing in the SP gaps can trap corrosion ions in time and effectively, significantly reducing the concentration of corrosion ions in the vicinity of the Mg surface. And the corrosion current density of CL/SP coating (Icorr=4.28x10- 11 A/cm2) is 3 orders of magnitude lower than that of most of the related reports. Furthermore, the CL/SP coating shows a strong self-healing ability.
关键词	Mg alloy Anti-corrosion coating Wear-resistance Superhydrophobic Self-healing
DOI	10.1016/j.porgcoat.2022.107299
收录类别	SCIE
语种	英语
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Applied ; Materials Science, Coatings & Films
WOS记录号	WOS:000895275600005
出版者	ELSEVIER SCIENCE SA
原始文献类型	Article
出版地	LAUSANNE
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.cqcet.edu.cn/handle/39TD4454/14387
专题	重庆电子科技职业大学
作者单位	1.Chongqing Univ, Coll Phys, State Key Lab Power Transmiss Equipment & Syst Sec, Chongqing Key Lab Soft Condensed Matter Phys & Sma, Chongqing 400044, Peoples R China; 2.Inst Smart City Chongqing Univ Liyang, Ctr Modern Phys, Liyang 213300, Jiangsu Provinc, Peoples R China; 3.Chongqing Univ Arts & Sci, Coll Mat Sci & Engn, Chongqing 402160, Peoples R China; 4.Sichuan Univ Sci & Engn, Inst Mat Sci & Engn, Mat Corros & Protect Key Lab Sichuan Prov, Zigong 643000, Sichuan Provinc, Peoples R China; 5.Chongqing Coll Elect Engn, Coll Software, Chongqing 401331, Peoples R China; 6.Chongqing Normal Univ, Coll Phys & Elect Engn, Key Lab Optoelect Funct Mat, Chongqing 401331, Peoples R China; 7.Chongqing Univ, Coll Optoelect Engn, Key Lab Optoelect Technol & Syst, Educ Minist China, Chongqing 400044, Peoples R China
推荐引用方式 GB/T 7714	Tang, Yuan,Wu, Fang,Fang, Liang,et al. Effect of deposition sequence of MgAl-LDH and SiO2@PDMS layers on the corrosion resistance of robust superhydrophobic/self-healing multifunctional coatings on magnesium alloy[J]. PROGRESS IN ORGANIC COATINGS,2023,174.
APA	Tang, Yuan.,Wu, Fang.,Fang, Liang.,Ruan, Haibo.,Hu, Jia.,...&Zhou, Miao.(2023).Effect of deposition sequence of MgAl-LDH and SiO2@PDMS layers on the corrosion resistance of robust superhydrophobic/self-healing multifunctional coatings on magnesium alloy.PROGRESS IN ORGANIC COATINGS,174.
MLA	Tang, Yuan,et al."Effect of deposition sequence of MgAl-LDH and SiO2@PDMS layers on the corrosion resistance of robust superhydrophobic/self-healing multifunctional coatings on magnesium alloy".PROGRESS IN ORGANIC COATINGS 174(2023).