Effect of Graphene Nanoparticles on Slurry Erosion Behavior of High-Velocity Oxy-Fuel (HVOF)-Sprayed Mo2C and Co–Ni-Based Coatings Over SS304 Steel

Metallurgical and Materials Transactions B Pub Date : 2024-09-06 DOI:10.1007/s11663-024-03249-1

Nitin Kumar, Jaspal Singh Gill

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Abstract

The present study delves into the challenges of slurry erosion in hydropower plant components, particularly focusing on Stainless-Steel 304 (SS304) limitations under high-velocity conditions. It proposes Mo₂C coating combinations applied via High-Velocity Oxy-Fuel (HVOF) spraying as a promising solution due to their high hardness, wear, and corrosion resistance. Three coatings (Coating A, Coating B, and Coating C) were formulated with varying Mo₂C, Co–Ni, and graphene nanoparticles (GNP) percentages, demonstrating unique erosion-resistant properties. Microscopic analysis revealed wear mechanisms, with Coating A displaying particle breakage, Coating B exhibiting fractured Mo₂C particles, and Coating C showing dynamic interactions with GNP, enhancing resistance. The findings suggest that tailored coatings incorporating GNP offer potential for erosion resistance improvement, prompting further exploration into optimizing GNP concentrations, refining deposition techniques, and assessing long-term durability under diverse operational conditions.

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石墨烯纳米颗粒对 SS304 钢上高速富氧燃料 (HVOF) 喷射的 Mo2C 和 Co-Ni-Based 涂层浆料侵蚀行为的影响

本研究深入探讨了水力发电厂部件所面临的浆液侵蚀挑战，尤其关注高速条件下不锈钢 304（SS304）的局限性。由于 Mo2C 涂层具有高硬度、耐磨性和耐腐蚀性，该研究提出了通过高速富氧燃料（HVOF）喷涂的 Mo2C 涂层组合作为一种有前途的解决方案。我们配制了三种涂层（涂层 A、涂层 B 和涂层 C），其中 Mo2C、Co-Ni 和石墨烯纳米颗粒（GNP）的比例各不相同，显示出独特的抗侵蚀特性。显微分析揭示了磨损机制，涂层 A 显示出颗粒断裂，涂层 B 显示出断裂的 Mo2C 颗粒，而涂层 C 则显示出与 GNP 的动态相互作用，从而增强了耐磨性。研究结果表明，含有 GNP 的定制涂层具有提高抗侵蚀性的潜力，这促使人们进一步探索如何优化 GNP 浓度、改进沉积技术以及评估在不同操作条件下的长期耐久性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Metallurgical and Materials Transactions B

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