Surface properties and corrosion protection study of a poly(N-ethyl-4-vinylpyridine) polyelectrolyte-based coating on an electrochemically formed Ti|TiO2 surface

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-09-24 DOI:10.1039/D4TC02777A

Jozefina Katić, Juraj Nikolić, Tea Juračić, Tin Klačić, Danijel Namjesnik and Tajana Begović

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Abstract

In this study, the surface properties and corrosion behavior of a titanium sample modified with an electrochemically formed oxide layer (Ti|TiO₂) and Ti|TiO₂ sample coated with poly(N-ethyl-4-vinylpyridinium) cations (PE4VP) were studied. It was shown, by means of atomic force microscopy and ellipsometry, that the Ti|TiO₂ surface is very flat with an average roughness of only 3.4 nm and an oxide layer thickness of 16.1 nm. The inner surface potential of the Ti|TiO₂ sample as a function of pH and concentration of sodium chloride was measured using the constructed Ti|TiO₂ electrode. In order to improve the corrosion protective effectiveness of the surface coating, the process parameter conditions for strong poly(N-ethyl-4-vinylpyridinium) cation optimal adsorption on the electrochemically formed TiO₂ oxide layer were determined using ellipsometry, tensiometry, and atomic force microscopy. The effect of adsorption of PE4VP cations on the inner surface potential and corrosion protection effectiveness of the TiO₂ and TiO₂-PE4VP coatings was examined. The electrochemical behaviour and corrosion properties of an unmodified titanium surface, titanium surface modified with an electrochemically formed TiO₂ and subsequently modified with a PE4VP polyelectrolyte-based coating were examined by means of electrochemical impedance spectroscopy. Increased polarization resistance values and high corrosion protection effectiveness after surface modification with the PE4VP coating indicate the formation of a highly protective coating with high corrosion resistance imparted to the underlying titanium. The results presented here provide an insight into the optimization of strong polyelectrolyte cation adsorption process parameters and demonstrate that application of a PE4VP coating is a suitable method for surface modification of titanium to enhance corrosion protection in an aggressive environment.

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基于聚（N-乙基-4-乙烯基吡啶）聚电解质的电化学形成的 Ti|TiO2 表面涂层的表面特性和腐蚀保护研究

本研究对电化学形成氧化层（Ti|TiO2）修饰的钛样品和涂有聚（N-乙基-4-乙烯基吡啶鎓）阳离子（PE4VP）的 Ti|TiO2 样品的表面特性和腐蚀行为进行了研究。原子力显微镜和椭偏仪显示，Ti|TiO2 表面非常平整，平均粗糙度仅为 3.4 nm，氧化层厚度为 16.1 nm。利用构建的 Ti|TiO2 电极测量了 Ti|TiO2 样品的内表面电位与 pH 值和氯化钠浓度的函数关系。为了提高表面涂层的腐蚀防护效果，使用椭偏仪、张力仪和原子力显微镜确定了电化学形成的 TiO2 氧化层上强聚（N-乙基-4-乙烯基吡啶）阳离子最佳吸附的工艺参数条件。研究了 PE4VP 阳离子的吸附对 TiO2 和 TiO2-PE4VP 涂层的内表面电位和腐蚀保护效果的影响。通过电化学阻抗光谱法研究了未改性钛表面、经电化学形成的 TiO2 改性的钛表面以及随后经 PE4VP 聚电解质涂层改性的钛表面的电化学行为和腐蚀特性。使用 PE4VP 涂层进行表面改性后，极化电阻值增加，腐蚀保护效果提高，这表明在钛的底层形成了具有高耐腐蚀性的高保护性涂层。本文介绍的结果为优化强聚电解质阳离子吸附工艺参数提供了启示，并证明应用 PE4VP 涂层是在侵蚀性环境中对钛进行表面改性以增强腐蚀防护的一种合适方法。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.