The effect of top of rail lubricant composition on adhesion and rheological behaviour

The effect of top rail lubricant composition on adhesion has been investigated using a laboratory ball-on-disc tribometer. Rheological properties were analysed viscosimeter and high pressure torsion device. As base medium, biodegradable ester oil with bentonite thickener was selected. Added particles for friction modification aluminium oxide, zinc copper sulfide solid lubricants molybdenum disulfide graphite. these components in the medium evaluated. It found that most dominant component modification. Based results, substances prepared tested. best performing provided optimal level adhesion. These also showed resilience to overdosing, which caused commercial products provide very low conditions. rheological investigation confirmed is controlled by elastohydrodynamic regime while stable values are result transition boundary lubrication.