The most durable rubber bushing material is usually fluororubber (FKM), especially performing best under extreme conditions.
Comparison of durability of different materials:
Fluororubber (FKM): Possesses excellent resistance to high temperatures, strong acids and alkalis, oils, and aging. It can operate continuously within a temperature range of -20℃ to 220℃ and has extremely strong resistance to extreme media such as 98% concentrated sulfuric acid, 37% hydrochloric acid, and 50% sodium hydroxide. Its overall corrosion resistance and service life can reach 10–15 years, making it the first choice for highly corrosive environments, but it is expensive.
Ethylene propylene diene monomer (EPDM): Excellent resistance to high temperatures (-50℃ to 150℃), strong alkalis, and ozone aging. It has good stability in high-temperature alkaline solutions and humid environments, with a service life of approximately 7–9 years. Suitable for wastewater treatment, desulfurization equipment, and other applications.
Butyl rubber (IIR): Excellent resistance to strong acids (such as 70% sulfuric acid and 30% hydrochloric acid), excellent airtightness, suitable for strong acid storage tanks at room temperature, with a service life of 8-10 years, but not resistant to oil and high-temperature strong alkalis.
Natural rubber and styrene-butadiene rubber: Although they have good elasticity and low cost, their heat resistance and chemical resistance are poor. They are generally used in ordinary vibration damping environments and have a shorter service life, usually 3-5 years.