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Lubricants 2017, 5(3), 23; doi:10.3390/lubricants5030023

Tribological Evaluation of Date Palm Fruit Syrup–A Potential Environmental-Friendly Lubricant

Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
Received: 7 June 2017 / Revised: 2 July 2017 / Accepted: 5 July 2017 / Published: 7 July 2017
(This article belongs to the Special Issue Green Chemistry in Lubrication)
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Date palm is one of the most cultivated palms mostly found in the Middle Eastern regions of the world. The date palm fruits are not only nutritionally rich, but also have a good amount of fatty acids such as oleic acid, palmitic acid, and linoleic acids, which have excellent anti-wear and lubricating properties, making it a potentially good candidate to be used as an environmentally-friendly lubricant. This study is a preliminary effort to explore the lubricating properties of date palm fruit syrup by conducting ball-on-disc wear tests on mild steel samples. Different concentrations (50, 75, and 100 vol %) of the syrup in water were tested at a normal load of 50 N and a sliding linear speed of 0.1 m/s. Scanning electron microscopy and optical profilometry were used to characterize the wear tracks and estimate the wear rates. 100 vol % date syrup with a viscosity of 16.95 mPa·s showed excellent results by reducing the coefficient of friction of steel-on-steel from 0.6 (dry conditions) to a value of ~0.1. The depth of the wear track reduced from ~152 µm (dry conditions) to ~11 µm, signifying a considerable reduction in wear. View Full-Text
Keywords: date palm fruit syrup; lubrication; environmentally friendly; tribology; friction; wear date palm fruit syrup; lubrication; environmentally friendly; tribology; friction; wear

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Mohammed, A.S. Tribological Evaluation of Date Palm Fruit Syrup–A Potential Environmental-Friendly Lubricant. Lubricants 2017, 5, 23.

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