How is the corrosion resistance of Rail Pads?

 

Rail pads have good corrosion resistance, especially those made from materials like high-performance polymers and some metals, which can withstand harsh environmental conditions, including moisture, salt, and temperature fluctuations. Studies have shown that rail pads installed in direct fixation tracks are not significantly affected by corrosion or environmental factors. Corrosion resistance can be further enhanced by the pad's material, design, and protective coatings.

 

 

Factors influencing corrosion resistance

 

• Material: Some materials, such as certain high-performance polymers and metals, are inherently resistant to corrosion.

 

Rubber Rail Pad
Technical Parameter	Unit	Value
Stiffness	KN	90-130
Hardness Shore A	℃	72-80 degree
Electronic Resistance	Ω	≥ 106
Tensile Strength before Aging	Mpa	≥12.5
Elongation before Aging	%	≥250

 

HDPE Rail Pad
Technical Parameter	Unit	Technical Requirement	Value
Density	g/cm3	0.95-0.98	0.95
Tensile Strength	Mpa	≥19	19
Elongation	%	>80	150
Melting Point	℃	170-190	190
Insulation Resistance	Ω	≥1×1010	3.5 ×1010
Hardness	A	≥98	98(A)

 

EVA: Polyethylene 80%, Vinyl Acetate 20%.
Technical Parameter	Unit	Technical Requirement	Value
Density	g/cm3	0.95-0.98	0.95
Tensile Strength	Mpa	≥15	16
Elongation	%	>500	550
Melting Point	℃	170-190	170
Insulation Resistance	Ω	≥1×1010	5.0 ×1010
Hardness	A	≥90	92(A)

 

• Environmental conditions: While some materials can be vulnerable, many rail pads are designed to be resistant to a variety of environmental conditions, including moisture, chemicals, and temperature extremes.

 

 

• Design: Metal cushion pads, for example, can be designed with a porous inner structure and elastic performance that gives them excellent resistance to mechanical and environmental stresses, including corrosion.

 

• Coatings: Protective coatings and other corrosion-resistant treatments can be applied to rail pads and their associated components, such as clips and sole plates, to improve their longevity.

 

• Maintenance: Proper installation and maintenance practices are also crucial for maximizing the corrosion resistance and lifespan of rail pads.

 

The Functionality of Rail Pads in Railway Systems

 

• Vibration Reduction and Noise Mitigation

One of the primary functions of rail pads is the reduction of vibrations and noise generated by trains. When a train traverses uneven track sections, the resulting vibrations can lead to discomfort for passengers and can also contribute to degradation of the track structure over time. Rail pads effectively absorb these vibrations, providing a quieter ride and extending the lifespan of both the tracks and adjacent structures.

 

• Load Distribution and Impact Absorption

Rail pads serve to distribute the concentrated loads from the train wheels over a larger surface area of the sleeper beneath. This not only helps minimize localized stress but also inhibits the deformation of the railway infrastructure. They provide an essential cushioning effect that absorbs impacts, ensuring that track and sleeper systems remain intact, and facilitating safe and reliable train operations.

 

 

• Enhancing Track Stability and Longevity

The installation of high-quality rail pads contributes significantly to the overall stability and longevity of railway tracks. By securely holding the rail in place, they prevent lateral movement, thereby minimizing misalignment issues that could arise from traffic or environmental influences. Furthermore, products such as those from GNEE are engineered to comply with stringent national and international standards, ensuring that railway networks maintain operational efficiency and safety over time.

 

As a professional rail fastener manufacturer, GNEE RAIL can produce various types of rubber rail pads with different materials, such as natural rubber, EVA, HDPE and so on. Our EVA/HDPE/rubber rail pads are with high elasticity, applying to types for rails such as rail UIC54, UIC60, BS80lbs,BS100lbs, and sizes as ordered. The pads can be customized with or without grooves, in various possible designs, depending on customers' requirements.

 

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