Study on the Influence of the MoS2 Addition Method on the Tribological and Corrosion Properties of Greases

IF 3.1 3区工程技术 Q2 ENGINEERING, MECHANICAL

Lubricants Pub Date : 2023-12-08 DOI:10.3390/lubricants11120517

Can Zhu, Zhongyi He, Liping Xiong, Jiusheng Li, Yinglei Wu, Lili Li

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引用次数: 0

Abstract

MoS2 lithium-based grease is suitable for lubrication protection between bearings at high temperatures and loads due to its excellent tribological properties. However, there is little research on the influence of different addition methods of MoS2 additive on its tribology and corrosion properties. In this work, eco-friendly vegetable oil was selected as the base oil, with MoS2 powder as the additive to synthesize lithium-based grease. The effects of different adding modes of MoS2 on the tribology and corrosion properties of the grease were studied. The experimental results showed that adding 0.01 wt% MoS2 before thickening (Method D) was more conducive to improving the tribological properties of lithium grease. The average friction coefficient was reduced by 26.1%, and the average wear scar diameter was reduced by 0.16 mm. After grinding and adding (Method B) 0.01 wt% MoS2, the corrosion inhibition efficiency of the steel sheet was as high as 96.97%. The reason was that the tribochemical reaction of MoS2 evenly distributed throughout the grease during friction, forming a thin friction film, reducing friction and wear. The protective film formed by MoS2 and GCr15-bearing steel improved the corrosion inhibition performance of the grease.

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添加 MoS2 的方法对润滑脂摩擦学和腐蚀特性的影响研究

MoS2锂基润滑脂由于其优异的摩擦学性能，适用于高温和负载下轴承之间的润滑保护。然而，关于二硫化钼添加剂不同添加方式对其摩擦学和腐蚀性能影响的研究很少。本研究选择环保型植物油为基础油，以二硫化钼粉为添加剂合成锂基润滑脂。研究了二硫化钼不同添加方式对润滑脂摩擦学和腐蚀性能的影响。实验结果表明，增稠前加入0.01 wt%的MoS2(方法D)更有利于提高锂基润滑脂的摩擦学性能。平均摩擦系数减小26.1%，平均磨损疤痕直径减小0.16 mm。研磨后加入(方法B) 0.01 wt%的MoS2后，钢板缓蚀效率高达96.97%。原因是摩擦过程中，MoS2的摩擦化学反应均匀分布在整个润滑脂中，形成了薄薄的摩擦膜，减少了摩擦和磨损。由MoS2和gcr15轴承钢形成的保护膜提高了润滑脂的缓蚀性能。

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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来源期刊

Lubricants Engineering-Mechanical Engineering

CiteScore

3.60

自引率

25.70%

发文量

293

审稿时长

11 weeks

期刊介绍： This journal is dedicated to the field of Tribology and closely related disciplines. This includes the fundamentals of the following topics: -Lubrication, comprising hydrostatics, hydrodynamics, elastohydrodynamics, mixed and boundary regimes of lubrication -Friction, comprising viscous shear, Newtonian and non-Newtonian traction, boundary friction -Wear, including adhesion, abrasion, tribo-corrosion, scuffing and scoring -Cavitation and erosion -Sub-surface stressing, fatigue spalling, pitting, micro-pitting -Contact Mechanics: elasticity, elasto-plasticity, adhesion, viscoelasticity, poroelasticity, coatings and solid lubricants, layered bonded and unbonded solids -Surface Science: topography, tribo-film formation, lubricant–surface combination, surface texturing, micro-hydrodynamics, micro-elastohydrodynamics -Rheology: Newtonian, non-Newtonian fluids, dilatants, pseudo-plastics, thixotropy, shear thinning -Physical chemistry of lubricants, boundary active species, adsorption, bonding