Evaluation of improved corrosion resistance of Zn alloy as electrode material by Co3O4 coatings

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Bulletin of the Chemical Society of Ethiopia Pub Date : 2023-11-29 DOI:10.4314/bcse.v38i1.18

R. J. Golden, Renjith Nimal, D. F. Melvin, K. Balasubramanian, J. Sunil

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Abstract

This work uses the sonochemical method to represent synthesized cobalt oxide nanoparticles (Co3O4) and analysed using different techniques. The X-ray diffraction analysis (XRD) and Fourier-transform infrared spectroscopy (FTIR) examinations of the synthesized nanoparticles confirmed their cubic structure and average crystallite size of 21.3 nm. The spherical surface shape and presence of components with a particle size of 25.3 nm were revealed. Scanning probe microscopy (SPM) methods analysed the Co3O4 coated plates' surface characteristics, including roughness and topographical ideas. An aqueous electrolyte medium (6 M KOH) was used to investigate the electrochemical corrosion behaviour of Co3O4-coated plates. According to the Tafel plot, coating Zn plates with a high surface area and mesoporous Co3O4 in KOH electrolytes greatly reduced the corrosion of the plates. The coated plates are thermally treated up to 600℃. The temperature-dependent anticorrosive properties of Co3O4 NPs are evaluated. KEY WORDS: Co3O4, Zn plate, Tafel plot, Linear sweep voltammetry, Anti-corrosive performance, Nanoindentation Bull. Chem. Soc. Ethiop. 2024, 38(1), 241-253. DOI: https://dx.doi.org/10.4314/bcse.v38i1.18

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评估用 Co3O4 涂层改善锌合金电极材料的耐腐蚀性能

本研究采用声化学方法表示合成的氧化钴纳米粒子（Co3O4），并使用不同的技术对其进行分析。对合成的纳米粒子进行的 X 射线衍射分析（XRD）和傅立叶变换红外光谱（FTIR）检测证实了其立方结构和 21.3 纳米的平均晶粒尺寸。球形表面形状和粒径为 25.3 纳米的成分的存在也得到了证实。扫描探针显微镜（SPM）方法分析了 Co3O4 涂层板的表面特征，包括粗糙度和地形特征。使用水性电解质介质（6 M KOH）研究了 Co3O4 涂层板的电化学腐蚀行为。根据 Tafel 图，在 KOH 电解质中涂覆高比表面和介孔 Co3O4 的锌板大大减少了对锌板的腐蚀。涂层板经热处理后的温度可达 600℃。评估了 Co3O4 NPs 随温度变化的防腐性能。关键词：Co3O4、Zn 板、塔菲尔图、线性扫描伏安法、抗腐蚀性能、纳米压痕 Bull.Chem.Soc.2024, 38(1), 241-253.DOI: https://dx.doi.org/10.4314/bcse.v38i1.18

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来源期刊

Bulletin of the Chemical Society of Ethiopia 化学-化学综合

CiteScore

2.20

自引率

8.30%

发文量

113

审稿时长

6-12 weeks

期刊介绍： The Bulletin of the Chemical Society of Ethiopia (BCSE) is a triannual publication of the Chemical Society of Ethiopia. The BCSE is an open access and peer reviewed journal. The BCSE invites contributions in any field of basic and applied chemistry.