Which type of sealing ring has good corrosion resistance?

In terms of corrosion resistance, various sealing ring materials have shown excellent performance, but the specific selection depends on the application environment and medium characteristics. Here are some sealing ring materials with good corrosion resistance and their characteristics:
Polytetrafluoroethylene (PTFE) sealing ring:
Excellent corrosion resistance: Polytetrafluoroethylene has extremely strong corrosion resistance and can resist the erosion of strong corrosive media such as acid, alkali, salt, etc., effectively preventing leakage problems of sealing rings due to corrosion.
Good high temperature resistance: The melting point of polytetrafluoroethylene is as high as 327 ℃, which can maintain stable performance in high temperature environments.
Chemical stability: According to authoritative testing reports, food grade polytetrafluoroethylene seals can resist corrosion from various chemicals.
High temperature stability: PTFE sealing rings can still maintain good elasticity and stability at high temperatures.
Mechanical performance: It has high strength, wear resistance, and fatigue resistance.
Biosafety: Non toxic, odorless, and will not contaminate food.
Fluororubber (FKM) sealing ring:
Excellent high temperature resistance, corrosion resistance, and oil resistance: suitable for sealing highly corrosive media such as strong acids, strong alkalis, etc.
Good elasticity: able to adapt to the thermal expansion and vibration of equipment.
Perfluoroether O-ring:
Super strong chemical corrosion resistance: can resist the corrosion of various chemicals, including acids, bases, ketones, esters, ethers, strong oxidants, etc.
Excellent high-temperature stability: The heat resistance can reach 327 degrees Celsius.
Widely applicable value: It has been widely used in fields such as petroleum, pharmaceuticals, and automobiles.
Other rubber material sealing rings:
Hydrogenated Nitrile Rubber (HNBR): It has excellent corrosion resistance, tear resistance, and compression deformation resistance, as well as good resistance to ozone, sunlight, and weather.
Silicone rubber (VMQ): It has excellent high temperature resistance, oxidation resistance, and aging resistance.
Ethylene propylene diene monomer (EPDM): It has excellent weather resistance, ozone resistance, water resistance, and chemical resistance.
Chloroprene rubber (CR): It has excellent resistance to sunlight and weather, as well as resistance to dilute acid and silicone grease lubricating oil.
In summary, materials such as polytetrafluoroethylene, fluororubber, and perfluoroether have shown excellent corrosion resistance. The specific choice of sealing ring material should be comprehensively considered based on factors such as application environment, medium characteristics, working temperature, working pressure, and cost.