Vibration and noise from wheel-rail corrugations reduce the life of vehicle and track components and bring great discomfort to passengers and residents living in close proximity to the tracks. Rail corrugations are a well-studied problem that can be broadly divided into 1) those related to freight and heavy haul, and 2) those usually associated with relatively light axle loads, typically on transit systems. The latter generally involve higher frequency of corrugations, 25 - 80 mm (short pitch).

Roll-slip (stick-slip) oscillations are involved in a number of corrugation initiation and formation mechanisms, especially in systems that exhibit a high level of friction, and negative friction characteristics. KELTRACK® and solid HPF friction modifiers have demonstrated the ability to change the negative friction characteristic of the wheel-rail interfacial layer to positive

Introducing a layer of material Kelsan friction modifier with positive friction attributes has reduced the onset of short pitch corrugations significantly on a number of transit systems.

Short Pitch Corrugation Solutions

Top of Rail Friction Control




Transit
Intelligent Trackside/Wayside Top-Of-Rail Friction Control System
Kelsan® KELTRACK® Liquid Top-Of-Rail Friction Modifier
   Portec Rail Protector® IV Trackside Top-Of-Rail Application System




Transit
OnBoard Transit Top-Of-Rail Friction Control System
Kelsan® HPF (High Positive Friction) Solid Stick Top-Of-Rail Friction Modifier