Comparison of Perfluoroelastomer and Nitrile Rubber (NBR): Differences in Oil and Chemical Resistance

In industrial and automotive applications, the oil and chemical resistance of rubber materials are key factors in determining their suitability. Perfluoroelastomer (FFKM) and Nitrile Butadiene Rubber (NBR) are two widely used elastic materials, each with its own unique properties and application areas. This article will compare the differences between these two rubbers in terms of oil resistance and chemical resistance in detail to help engineers and technicians choose the most suitable material for their application.

1. Oil resistance

Oil resistance of perfluoroelastomer

Excellent oil resistance: Perfluoroelastomer has one of the best oil resistance among all elastic materials. It is able to resist various types of oil, including petroleum-based oils, synthetic oils, and animal oils.

Long-term durability: Perfluoroelastomer maintains its oil resistance under high temperature and high pressure environments, and is suitable for applications exposed to high oil environments for a long time.

Oil resistance of nitrile rubber

Good oil resistance: Nitrile rubber has excellent oil resistance, especially for petroleum-based oils and mineral oils. It shows good durability and stability in oil environments.

Wide applicability: Nitrile rubber is widely used in oil seals, gaskets and seals in the automotive and industrial fields.

Oil resistance comparison

Perfluoro rubber is better than nitrile rubber: Perfluoro rubber has better oil resistance than nitrile rubber, especially under extreme conditions (such as high temperature, high pressure and high concentration of oil environment), the performance of perfluoro rubber is more stable.

2. Chemical resistance

Chemical resistance of perfluoro rubber

Excellent chemical corrosion resistance: Perfluoro rubber can resist the corrosion of almost all chemicals, including strong acids, strong alkalis, organic solvents and oxidants.

Wide chemical compatibility: Perfluoro rubber is suitable for handling various corrosive chemicals including sulfuric acid, nitric acid, hydrofluoric acid, etc.

Chemical resistance of nitrile rubber

Good chemical corrosion resistance: Nitrile rubber has good chemical corrosion resistance, especially for some common acids, alkalis and organic solvents.

Limitations: In some strong acid, strong alkali and high concentration of organic solvent environments, the chemical resistance of nitrile rubber is poor.

Chemical resistance comparison

Perfluororubber is better than nitrile rubber: Perfluororubber is significantly better than nitrile rubber in chemical corrosion resistance, especially in highly corrosive chemical environments, where perfluororubber shows stronger tolerance.

3. Application scenario comparison

Application scenarios of perfluororubber

Aerospace: used for seals, gaskets, hoses and other key components of aircraft and spacecraft.

Chemical and petrochemical: used for sealing and protection of highly corrosive chemicals, such as valve seals, pipe seals, etc.

Electronics and semiconductors: used for sealing and protection in the semiconductor manufacturing process.

Medical equipment: used for high sealing and chemical resistance requirements of medical devices.

Application scenarios of nitrile rubber

Automotive industry: used for engine seals, fuel system seals, hoses, etc.

Oil and gas: used for oil well equipment, pipeline seals, valve seals, etc.

Refrigeration and air conditioning: used for seals and gaskets of refrigeration equipment.

Food processing: used for seals and gaskets of equipment in contact with food.

Conclusion

Perfluororubber and nitrile rubber have their own advantages and disadvantages in terms of oil resistance and chemical resistance. Perfluoroelastomer is suitable for demanding applications under extreme conditions due to its excellent oil and chemical resistance. Nitrile rubber performs well in oil resistance and general chemical resistance and is suitable for a wide range of automotive and industrial applications. The selection of suitable rubber materials depends on the specific application environment and performance requirements. Engineers and technicians should make selections based on actual conditions to ensure optimal performance and reliability.

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