Sometimes the sides of rails appear to be painted. Why is this done?

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Sometimes the sides of rails appear to be painted. Why is this done?

July 19, 2019, 12:15 PM

Normally, rails do not need to be painted as the expected life span resulting from the effects of wheel wear and fatigue is such that corrosion is not a significant problem. In some areas, however, corrosion of rails, especially on the inside of the rail foot below the liners, or on the sides, can be quite severe, and may result in the need for premature renewal of the tracks even if the rails are otherwise not worn or fatigued by the traffic conditions. The problem is worse when the spots where the corrosion makes the rails weak move out of the sleeper seats during activities like track destressing.

Corrosion happens in coastal areas and regions such as the Sambhar Lake area where there is high salinity. Damp tunnels are also places where corrosion can be higher than normal. In addition, since IR currently uses direct discharge toilets for passenger trains, corrosion resulting from toilet waste is a significant problem on some lines, and especially at approaches to major stations where many busy lines converge.

To prevent such corrosion and to increase the life of the rails, IR practice is to paint the rails on the sides and on the foot in affected areas.

Source – IFRCA.org

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