Effect of modified MgAl-LDH coating on corrosion resistance and friction properties of aluminum alloy

doi:10.1016/j.cjche.2023.05.013

Chinese Journal of Chemical Engineering ›› 2023, Vol. 63 ›› Issue (11): 81-95.DOI: 10.1016/j.cjche.2023.05.013

Effect of modified MgAl-LDH coating on corrosion resistance and friction properties of aluminum alloy

Zuokai Wang¹, Zhuangzhuang Xiong³, Xinxin Li³, Di Wang², Yuelin Wang³, Shangcheng Wu³, Lixia Ying², Zhideng Wang¹, Guixiang Wang¹

1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;
2. College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China;
3. College of Materials Science and Chemical Engineering, Yantai Research Institute of Harbin Engineering University, Yantai 265503, China

Received:2023-03-08 Revised:2023-05-09 Online:2024-01-08 Published:2023-11-28
Contact: Zhideng Wang,E-mail:761766@baosteel.com;Guixiang Wang,E-mail:wangguixiang@hrbeu.edu.cn
Supported by:
This work is financially supported by the National Natural Science Foundation of China (51971071 and 52075112) and Fundamental Research Projects of Science & Technology Innovation and development Plan in Yantai City (2022JCYJ023).

Effect of modified MgAl-LDH coating on corrosion resistance and friction properties of aluminum alloy

Zuokai Wang¹, Zhuangzhuang Xiong³, Xinxin Li³, Di Wang², Yuelin Wang³, Shangcheng Wu³, Lixia Ying², Zhideng Wang¹, Guixiang Wang¹

1. College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;
2. College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China;
3. College of Materials Science and Chemical Engineering, Yantai Research Institute of Harbin Engineering University, Yantai 265503, China

通讯作者: Zhideng Wang,E-mail:761766@baosteel.com;Guixiang Wang,E-mail:wangguixiang@hrbeu.edu.cn
基金资助:
This work is financially supported by the National Natural Science Foundation of China (51971071 and 52075112) and Fundamental Research Projects of Science & Technology Innovation and development Plan in Yantai City (2022JCYJ023).

Abstract

Abstract: The in-situ growing approach was utilized in this article to construct the magnesium-aluminum layered double hydroxide (MgAl-LDH) film on the surface of a 1060 aluminum anodized film. To improve the corrosion resistance and friction qualities of aluminum alloy, the MgAl-LDH coating was treated using stearic acid (SA) and thiourea (TU). The aluminum substrate and anodized aluminum film layer corroded to varying degrees after 24 h of immersion in 3.5% (mass) NaCl solution, while the modified hydrotalcite film layer continued to exhibit the same microscopic morphology even after being immersed for 7 d. The results show that the synergistic action of thiourea and stearic acid can effectively improve the corrosion resistance of the MgAl-LDH substrate. The tribological testing reveals that the hydrotalcite film layer and the modified film layer lowered the friction coefficient of the anodized aluminum surface substantially. The results of the simulations and experiments demonstrate that SA forms the dense LDH-TU interlayer film layer by exchanging NO₃^- ions between TU layers on the one hand and the LDH-SA film layer by adsorption on the surface of LDH on the other. Together, these two processes create LDH-TU-SA, which can significantly increase the substrate's corrosion resistance. This synergistically modified superhydrophobic and retardant hydrotalcite film layer offers a novel approach to the investigation of wear reduction and corrosion protection on the surface of aluminum and its alloys.

Key words: Anodizing, Layered double hydroxide, Superhydrophobic, Corrosion resistance, Tribological properties

摘要： The in-situ growing approach was utilized in this article to construct the magnesium-aluminum layered double hydroxide (MgAl-LDH) film on the surface of a 1060 aluminum anodized film. To improve the corrosion resistance and friction qualities of aluminum alloy, the MgAl-LDH coating was treated using stearic acid (SA) and thiourea (TU). The aluminum substrate and anodized aluminum film layer corroded to varying degrees after 24 h of immersion in 3.5% (mass) NaCl solution, while the modified hydrotalcite film layer continued to exhibit the same microscopic morphology even after being immersed for 7 d. The results show that the synergistic action of thiourea and stearic acid can effectively improve the corrosion resistance of the MgAl-LDH substrate. The tribological testing reveals that the hydrotalcite film layer and the modified film layer lowered the friction coefficient of the anodized aluminum surface substantially. The results of the simulations and experiments demonstrate that SA forms the dense LDH-TU interlayer film layer by exchanging NO₃^- ions between TU layers on the one hand and the LDH-SA film layer by adsorption on the surface of LDH on the other. Together, these two processes create LDH-TU-SA, which can significantly increase the substrate's corrosion resistance. This synergistically modified superhydrophobic and retardant hydrotalcite film layer offers a novel approach to the investigation of wear reduction and corrosion protection on the surface of aluminum and its alloys.

关键词: Anodizing, Layered double hydroxide, Superhydrophobic, Corrosion resistance, Tribological properties

Zuokai Wang, Zhuangzhuang Xiong, Xinxin Li, Di Wang, Yuelin Wang, Shangcheng Wu, Lixia Ying, Zhideng Wang, Guixiang Wang. Effect of modified MgAl-LDH coating on corrosion resistance and friction properties of aluminum alloy[J]. Chinese Journal of Chemical Engineering, 2023, 63(11): 81-95.

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Effect of modified MgAl-LDH coating on corrosion resistance and friction properties of aluminum alloy

Effect of modified MgAl-LDH coating on corrosion resistance and friction properties of aluminum alloy

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