Abstract
Base oils containing different nanoparticles with varying concentrations are prepared, in which SiO2, TiO2 and ZnO (20 nm) nanoparticles are employed to improve the lubrication performance. Their tribological properties are evaluated on a ball-on-disk tribometer. The results show that the nano-additive lubricants exhibit a good friction reduction and anti-wear ability at the optimal concentration of 1.0 wt.%, in which SiO2 nanoparticles can reduce the coefficient of friction (COF) and the area of wear scar (AWS) by 45.6% and 35%, respectively. The SiO2 nanoparticles exhibit the best potential additive tested. The lubrication mechanisms of the nanoparticles can be attributed to the rolling, mending and the protective films.
Highlights
Applying lubricants during cold rolling can achieve the objectives of industry: dimension accuracy, smooth surface, save energy and reduced roll wear [1]
Nanoparticles are not easy to synthesize; and secondly, colloidal solutions are unstable. These obstacles have been defeated. It has been reported by a number of researchers that the addition of nanoparticles into lubricants exhibits a promising performance in the friction reduction and anti-wear properties, especially in the mixed lubrication regime [4,5,6]
The objective of this study is to identify the most suitable nanoparticles for the cold rolling lubricants among the three candidates, and reveal the lubrication mechanisms, developing an effective nano-additive lubricant in the practical cold rolling production line
Summary
Applying lubricants during cold rolling can achieve the objectives of industry: dimension accuracy, smooth surface, save energy and reduced roll wear [1]. The addition of nanoparticles into lubricants to enhance their performance is not a recent idea. Nanoparticles are not easy to synthesize; and secondly, colloidal solutions are unstable It has been reported by a number of researchers that the addition of nanoparticles into lubricants exhibits a promising performance in the friction reduction and anti-wear properties, especially in the mixed lubrication regime [4,5,6]. The applied nanoparticles in the lubricants include metals [7,8], metallic oxides [9,10], The nanoparticle chosen to enhance the lubricants in cold rolling must be low cost, non-toxicity, and show good tribological performances in cold rolling similar circumstances. The objective of this study is to identify the most suitable nanoparticles for the cold rolling lubricants among the three candidates, and reveal the lubrication mechanisms, developing an effective nano-additive lubricant in the practical cold rolling production line
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