Corrosion Of Rail Essay

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CORROSION- RESISTANT RAILS

Mohit Khanna, Aman Bhatt, Bharat Singh Pimoli

Development of rail steel with improved corrosion resistance, compared to the standard rail steel used by the Indian Railways is reported. The reason of crevice corrosion at the rail foot is due to discharge from the toilets, acid rain and other atmospheric conditions like humidity etc. The possible methods to prevent corrosion of rails have been highlighted.

Keywords: Crevice corrosion, galvanization, stray current corrosion, polymer.

India has the fourth largest railway network in the world, so large funds are invested annually to upgrade and maintain the railway tracks in India because it is the major transportation system of the country. Maintenance of
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1. Indian Railway Network

Indian railway network is one of the world's largest railway networks comprising 115,000 km (71,000 mi) of track over a route of 65,436 km (40,660 mi) and 7,172 stations. The composition of a typical rail is 0.71 C–1.04 Mn, usually called as C–Mn rail steel. It is essentially a wear-resisting grade rail, according to the Indian Railways specification4. From a strength perspective (ultimate tensile strength of 880 MPa or 90 kg/mm2), the C– Mn rail is popularly known as90 UTS rail or Grade 880 rail.

The pre-reinforced concrete sleeper is the second component of the rail track. The entire track structure is more stable due to the heavier weight of concrete sleepers5. A grooved rubber pad (made of styrene butadiene, poly butadiene rubber or natural rubber) is placed between the rail and the sleeper. This absorbs vibrations and impact, provides insulation and also increases the coefficient of friction between the sleeper and the rail6. The third component is the rail-fastening system that is used to fasten the rails to the sleepers. Elastic rail clips (ERCs) are the modern fasteners which allow dampening of the

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