Effect of graphene on mechanical and anti-corrosion properties of TiO2-SiO2 sol-gel coating

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Anti-corrosion Methods and Materials Pub Date : 2024-09-16 DOI:10.1108/acmm-05-2024-3023

Dmitry Leonidovich Kovalenko, Vy Uong Van, Van Phuc Mac, Thien Vuong Nguyen, Lan Pham Thi, Tuan Anh Nguyen, Vladimir Evgenevich Gaishun, Vasili Vasilievich Vaskevich, Dai Lam Tran

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Abstract

Purpose

This paper aims to explore how graphene can improve the mechanical and anti-corrosion properties of TiO₂-SiO₂ sol-gel coating. This sol-gel coating has been prepared on aluminum alloy substrate using graphene as both nano-filler and corrosion inhibitor.

Design/methodology/approach

To examine the effect of graphene on mechanical properties of sol-gel coating, the abrasion resistance, adhesion strength and scratch resistance of coating have been evaluated. To reveal the effect of graphene on the anti-corrosion property of coating for aluminum alloy, the electrochemical impedance spectroscopy (EIS) has been conducted in 3.5 Wt.% NaCl medium.

Findings

Scanning electron microscopy images indicate that graphene nanoplatelets (GNPs) have been homogeneously dispersed into the sol-gel coating matrices (at the contents from 0.1 to 0.5 Wt.%). Mechanical tests of coatings indicate that the graphene content of 0.5 Wt.% provides highest values of adhesion strength (1.48 MPa), scratch resistance (850 N) and abrasion strength (812 L./mil.) for the sol-gel coating. The EIS data show that the higher content of GNPs improve both R₁ (coating) and R₂ (coating/Al interface) resistances. In addition to enhancing the coating barrier performance (graphene acts as nanofiller/nano-reinforcer for coating matrix), other mechanism can be at work to account for the role of the graphene inhibitor in improving the anticorrosive performance at the coating/Al interface.

Originality/value

Application of graphene-based sol-gel coating for protection of aluminum and its alloy is very promising.

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石墨烯对 TiO2-SiO2 溶胶凝胶涂层机械性能和抗腐蚀性能的影响

目的本文旨在探讨石墨烯如何改善 TiO2-SiO2 溶胶凝胶涂层的机械和防腐蚀性能。为了研究石墨烯对溶胶凝胶涂层机械性能的影响，我们对涂层的耐磨性、附着强度和抗划伤性进行了评估。结果扫描电子显微镜图像显示，石墨烯纳米颗粒（GNPs）已均匀分散在溶胶-凝胶涂层基质中（含量为 0.1 至 0.5 Wt.%）。涂层的机械测试表明，石墨烯含量为 0.5 Wt.%时，溶胶-凝胶涂层的附着强度（1.48 MPa）、抗划伤强度（850 N）和耐磨强度（812 L./mil.）均达到最高值。EIS 数据显示，GNPs 含量越高，R1（涂层）和 R2（涂层/铝界面）的阻隔性越好。除了提高涂层的阻隔性能（石墨烯作为涂层基体的纳米填料/纳米强化剂）外，石墨烯抑制剂在提高涂层/铝界面防腐性能方面的作用还可能与其他机制有关。

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.