Abstract
Water glycol fluids are commonly used as fire-resistant hydraulic fluids, particularly in areas where fires cannot be tolerated, such as foundries, steel mills and mines. However, they have the disadvantage that their wear resistance is unsatisfactory. Hence, there is a need for an additive package which overcomes this poor wear resistance. In order to design an effective water glycol hydraulic fluid for this purpose, four additive packages were considered. The performance of the lubricant composition developed with these packages is studied in detail. The physico-chemical and tribological properties of the formulations were determined using standard methods. The load-carrying properties were studied by four-ball and Timken load methods. The antiwear performance and coefficient of friction were studied by using four-ball and Schwingung Reibung Verschleiss test methods. The topography and surface analysis were carried out using scanning electron microscopy and X-ray photoelectron spectroscopy techniques. Copyright © 2006 John Wiley & Sons, Ltd.
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