Study on the Mechanical Properties and Corrosion Resistance of Zinc Graphene Oxide Composite Coating

doi:10.12422/j.issn.1672-6952.2025.06.010

Abstract

Abstract:

To improve the mechanical properties and corrosion resistance of zinc coatings, zinc graphene oxide (Zn-GO) composite coatings were prepared by direct current electrodeposition method. The microstructure, mechanical properties, and corrosion resistance of Zn-GO composite coatings were systematically studied using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), uniaxial tensile testing (SSRT), and electrochemical testing, and compared with traditional pure zinc coatings. The results showed that the addition of graphene oxide significantly optimized the crystal structure of the coating, increasing the tensile strength of the coating by about 6.3% and the yield strength by about 3.2%. The corrosion current density of Zn-GO composite coating was reduced by 80% compared to pure zinc coating, demonstrating excellent corrosion resistance. Zn?GO composite coating has a long corrosion resistance life. Zn-GO composite coating has high potential for application in marine anti-corrosion.

Key words: Graphene oxide, Composite coating, Corrosion resistance, Mechanical propertie

摘要：

为提高锌涂层的力学性能和耐腐蚀性，采用直流电沉积法制备了锌?氧化石墨烯（Zn-GO）复合涂层；通过扫描电子显微镜（SEM）、能谱分析（EDS）、X射线衍射（XRD）、单向拉伸实验（SSRT）及电化学测试等手段，系统地研究了Zn?GO复合涂层的微观结构、力学性能以及耐腐蚀性能，并与传统纯锌涂层进行了对比分析。结果表明，氧化石墨烯的添加显著优化了涂层的晶体结构，镀层的抗拉强度提高了约6.3%，屈服强度提高了约3.2%；Zn-GO复合涂层的腐蚀电流密度较纯锌涂层降低了80%，表现出优异的耐腐蚀性；Zn-GO复合涂层具有较长的耐腐蚀寿命；Zn-GO复合涂层在海洋防腐方面具有较高的应用潜力。

关键词: 氧化石墨烯, 复合涂层, 耐腐蚀性, 力学性能

CLC Number:

TE85

Shuang AN, Dan WANG, Liang ZENG, Ming WU. Study on the Mechanical Properties and Corrosion Resistance of Zinc Graphene Oxide Composite Coating[J]. Journal of Liaoning Petrochemical University, 2025, 45(6): 75-81.

安爽, 王丹, 曾亮, 吴明. 锌⁃氧化石墨烯复合涂层力学性能及耐腐蚀性能研究[J]. 辽宁石油化工大学学报, 2025, 45(6): 75-81.

Figures/Tables 11

Table 1 Chemical composition of electrogalvanizing solution

组分	质量浓度/（g·L^-1）
ZnSO₄·7H₂O	180.00
Na₂SO₄	30.00
NaCl	10.00
CTAB	0.05

Fig.1 SEM micrographs of Zn coating and Zn?GO composite coating

Fig.2 EDS spectra of surface morphology of Zn coating and Zn?GO composite coating

Fig.3 Energy spectrum analysis of Zn?GO composite coating

Fig.4 XRD spectra of Zn coating and Zn?GO composite coating

Fig.5 Sectional morphology of Zn coating and Zn?GO composite coating

Fig.6 Stress strain curves of Zn coating and Zn?GO composite coating

Fig.7 Electrochemical impedance spectroscopy of Zn coating and Zn?GO composite coating in a 3.5% NaCl solution by mass fraction

Fig.8 Electrochemical fitting of the equivalent circuit model

Table 2 EIS fitting data results of Zn coating and Zn?GO composite coating in a 3.5% NaCl solution by mass fraction

涂层	R_s/(Ω·cm²)	R_ct/（kΩ·cm²）	R_p/（kΩ·cm²）
Zn	5.28±0.21	30.58±1.45	41.36±1.67
Zn⁃GO	6.22±0.11	107.84±2.06	131.01±1.93

Fig.9 Surface morphology of Zn coating and Zn?GO composite coating after salt spray for 120 hours

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