In terms of corrosion resistance, a variety of sealing materials have excellent performance, but the specific choice needs to be based on the application environment and media characteristics. The following are some sealing ring materials with good corrosion resistance and their characteristics:
Polytetrafluoroethylene (PTFE) seals:
Excellent corrosion resistance: polytetrafluoroethylene has strong corrosion resistance, can resist acid, alkali, salt and other corrosive media erosion, effectively prevent the sealing ring due to corrosion and leakage problems.
Good high temperature resistance: the melting point of polytetrafluoroethylene is as high as 327℃, which can maintain stable performance in high temperature environment.
Chemical stability: According to the test reports of authoritative institutions, food-grade polytetrafluoroethylene seals can resist the erosion of various chemical substances.
High temperature stability: polytetrafluoroethylene sealing ring can still maintain good elasticity and stability at high temperatures.
Mechanical properties: high strength, wear resistance and fatigue resistance.
Biosafety: non-toxic, tasteless, will not pollute the food.
Fluoro rubber (FKM) seal ring:
Excellent high temperature resistance, corrosion resistance and oil resistance: suitable for sealing corrosive media, such as strong acid, strong alkali, etc.
Good elasticity: can adapt to the thermal expansion and vibration of the equipment.
Perflurane O-ring:
Strong chemical corrosion resistance: can resist the corrosion of a variety of chemicals, including acids, bases, ketones, esters, ethers, strong oxidants and so on.
Excellent high temperature stability: Heat resistance up to 327 degrees Celsius.
Wide application value: It is widely used in petroleum, pharmaceutical, automobile and other fields.
Other rubber material sealing rings:
Hydrogenated nitrile butadiene rubber (HNBR) : has excellent corrosion resistance, tear resistance and compression deformation characteristics, ozone resistance, sunlight resistance, weather resistance is good.
Silicone rubber (VMQ) : has excellent resistance to high temperature, oxidation and aging.
Ethylene propylene diene rubber (EPDM) : has good weather resistance, ozone resistance, water resistance and chemical resistance.
Neoprene rubber (CR) : sun resistance, weather resistance is particularly good, dilute acid resistance, silicone grease resistance lubricants.
In summary, polytetrafluoroethylene, fluororubber, perflurane and other materials have excellent performance in corrosion resistance. The specific choice of sealing material should be considered according to the application environment, medium characteristics, working temperature, working pressure and cost.
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