Anti-Corrosion Solutions for Rail Bolts

Railway rail fastener is the track is used to link rail and sleeper (or other types of under-rail base) parts, also known as the middle joint parts. Its role is to fix the rail on the sleeper, to maintain the gauge and prevent the rail relative to the sleeper of the longitudinal and transverse movement.

Railway rail fastening system is divided into: shrapnel fastening system, fastening plate fastening system, spring bar fastening system.

Functions and characters of railway rail bolts

Railway rail bolts are important parts for fixing railway rails, which have the functions of carrying wheel weight, sharing rail load, transferring power and so on. Its structure is characterised by the bolt head, screw, washer, nut and other components. The quality of railway rail bolts and installation quality is related to the safety and normal operation of railway transport.

The necessity of anti-corrosion of railway rail bolts

In actual use, railway rail bolts are susceptible to corrosion by rain, snow, river water and other moisture and erosion by atmospheric pollutants such as wind and sand, dense fog and other air pollutants, resulting in corrosion, rust and deformation of the bolts, thus affecting the stability and safety of the railway transport system. Therefore, the anti-corrosion treatment of railway rail bolts is crucial.

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Railway rail bolt anti-corrosion measures and methods

Selection of materials with anti-corrosion properties: such as stainless steel, copper, titanium, etc.

Surface treatment: such as spraying, galvanising, chrome-plating and other anti-corrosive materials, using anti-corrosive oil, corrosion inhibitors and other anti-corrosive agents for coating.

Regular inspection: maintenance and replacement of damaged bolts

As a steel railway track accessories Supplier in China, Glory Rail Could offer steel railway track accessories. Include crane rail clips, rail spikes, l-anchor bolts, rail fasteners, rail clamps, rail grout, rubber pad etc.

Since almost all commercial fasteners are made of carbon and alloy steels, some types of fasteners are expected to resist corrosion, and even fasteners with corrosion-resistant materials still require a surface treatment to prevent corrosion of the different materials.

In addition, the plating of the surface treatment must be firmly adhered so that it does not come off during installation and removal, and in the case of threaded fasteners, the plating needs to be thin enough so that the threads will still be able to be screwed together after plating.

The principle and use of reducing the thickness of the material by micro-coating for anti-corrosion protection generally has a lower temperature limit for the plating than for the fastener material, so it is also necessary to take into account the requirements of the operating temperature at which the fastener is to be used.

For the surface treatment, people are generally concerned about the aesthetic and anti-corrosion, but the main function of the fastener is to fasten the parts, and the surface treatment of the fastener fastening performance also has a great impact, so the selection of the surface treatment, should also be considered in the fastening performance of the factors, that is, the installation of the torque – the consistency of the pre-tensioning force.