Rail pads are a critical component in the railway infrastructure that plays a vital role in ensuring the safe and efficient operation of trains. A rail pad is a resilient layer that sits between the rail and the tie, serving as a cushioning material that absorbs the dynamic forces generated by the trains. The primary function of rail pads is to reduce the impact and vibration caused by the passing trains, thereby preventing damage to the rail and the surrounding components.
Which material is most corrosion resistant for railroad pads?
For superior corrosion resistance in railroad pads, HDPE (High-Density Polyethylene) excels due to its inherent chemical resistance, UV stability, and low water absorption, ideal for harsh conditions like salt spray or humid mines, though composite pads (rubber/HDPE) offer a balance of corrosion defense and cushioning, while specialized rubber with additives (like butyl rubber) handles vibration well but needs UV/aging protection.
Top Choices for Corrosion Resistance:
HDPE (High-Density Polyethylene):
Why it's great: Highly resistant to chemicals, UV rays, and moisture, preventing rust and material degradation.
Best for: Heavy freight lines, industrial areas (mines, coastal zones) where durability against environmental factors is crucial.
| 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) |
Composite Pads (Rubber-Plastic/Fiber Reinforced):
Why they're great: Combines materials like rubber for damping with HDPE or fibers for strength and excellent corrosion resistance against chemicals and saltwater.
Best for: Mixed-traffic lines or harsh environments needing both shock absorption and corrosion protection.
Other Materials & Considerations:
Rubber: Good damping but poor aging/UV resistance, requiring specific blends or UV inhibitors for longevity in exposed areas.
| 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 |
EVA (Ethylene-Vinyl Acetate): Offers a blend of moderate damping and good aging resistance, suitable for general use but not the top for extreme corrosion.
| 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) |
Advantages of using rubber, eva, and hape to manufacture rail elastic pads
Rubber, EVA (Ethylene Vinyl Acetate), and HDPE (High-Density Polyethylene, often used alongside) offer distinct advantages for rail pads, providing excellent shock absorption, vibration dampening, noise reduction, protecting rails/sleepers from wear, ensuring electrical insulation, and enhancing track life, with Rubber excelling in heavy loads/durability, EVA in elasticity/urban transit, and HDPE in chemical resistance/lightweight strength, all contributing to safer, quieter, and lower-maintenance railways.
| Raw Material | Rubber, EVA, TPEE, HDPE |
| Standard | UIC, AREMA, TB/T2626-95 |
| Application | 43kg/m, 50kg/m, 60kg/m, 75kg/m,115RE, UIC54, UIC60, S49 |
| Model number | 43-7-7, 43-10-7, 50-7-9, 50-10-9, 60-10-17, 60-12-17 |
| Operating temperature | -50~70 degrees |
| Certificate | MSDS, ROHS, REACH |
| Notes | They should be stored in a clean, ventilated place. Don't be in direct sunlight, and keep away from the heat source and chemical reagent. Don't touch the oil, organic solvent, and other chemicals. Banned exposure. |
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. In railway fastening system, rubber rail pads are often installed between the rail tracks and the concrete railway sleepers.