Keywords: solid stick, tread contact, friction modification, twin disc rig.

This work studies the use of solid stick at tread contact conditions using twin disc rig. The solid stick was applied using a spring-loaded applicator. Three test types were proposed in assessing the effect of a solid stick on the traction of the wheel and rail. The traction-creepage tests were the first and these test could show how the traction changes across different slippage under the influence of the solid stick. The second test was the retentivity tests. This could determine how long the product would stay in the contact and maintain the desired traction level. The third test was the wear test, which investigated the mass loss of the specimens when the solid product was applied. The results showed that the solid products could reduce the dry traction to an intermediate traction level across various slippage and also significantly reduce the wear of the disc specimens. This work shows that the twin disc rig is suitable to be used to test solid stick products. The test conditions can also be adjusted when the solid stick is more lubricious in nature, such as those used for flange lubrication.

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