Investigating the Influence of Post-Heat Treatment on the Corrosion Resistance and Mechanical Properties of Nickel-Graphene Nanocomposite Coatings

IF 0.8 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2025-09-26 DOI:10.1134/S2070205125700200

Chinnarasu Kannan, Suresh Velayudham, Prabu Baskar, Mayakrishnan Prabakaran

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Abstract

This research aims to improve the mechanical characteristics of surfaces coated with nickel-graphene (Ni-G) nanocomposite material by using a single post-heat treatment surface hardening approach combined with oil quenching. The nanocomposite coating was developed using a pulse reverse electrodeposition technique using a Watts bath. The surface morphology of the coatings was analyzed with the help of X‑ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) with EDAX. The coated surface properties like micro-hardness, surface roughness, wear, and corrosion resistance were assessed by Vickers microhardness tester, roughness tester, pin-on-disk equipment, and electrochemical impedance spectroscopy. Specimens with Ni-G nanocomposite coating were post-heat treated at 400°C for 1 h, and oil quenched. With heat treatment, the coated surface exhibited superior properties in comparison with specimens that are not heat treated with a hardness of 467.3 HV, surface roughness of 0.638 µm, wear rate of 8.10 × 10^–7mm³/N m, and corrosion protection efficiency of 96.50%. The improved surface properties were due to the grain refinement and particle strengthening, with an increased average crystallite size of 19.6 to 23.82 nm, with a 75.59% reduction in average coefficient of friction achieved for the post-heat-treated surface than the bare surface.

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研究后热处理对镍-石墨烯纳米复合镀层耐蚀性和力学性能的影响

本研究旨在采用单次热处理后表面硬化结合油淬的方法，改善镍-石墨烯纳米复合材料表面的力学特性。采用脉冲反向电沉积技术制备了纳米复合涂层。利用X射线衍射仪（XRD）和EDAX场发射扫描电镜（FESEM）分析了涂层的表面形貌。涂层表面的显微硬度、表面粗糙度、磨损和耐腐蚀性等性能通过维氏显微硬度计、粗糙度计、针盘式设备和电化学阻抗谱进行了评估。Ni-G纳米复合涂层试样经400℃后热处理1 h，油淬。热处理后，涂层表面硬度为467.3 HV，表面粗糙度为0.638µm，磨损率为8.10 × 10-7mm3 /N m，防腐效率为96.50%，优于未经热处理的试样。表面性能的改善是由于晶粒细化和颗粒强化，平均晶粒尺寸增加了19.6 ~ 23.82 nm，平均摩擦系数比未热处理表面降低了75.59%。

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.