What is the corrosion resistance of fluorosilicone EMI gaskets?

Hey there! As a supplier of fluorosilicone EMI gaskets, I often get asked about the corrosion resistance of these nifty little products. So, I thought I'd take a deep dive into this topic and share some insights with you all.

First off, let's talk about what fluorosilicone EMI gaskets are. These gaskets are a type of sealing material that combines the properties of fluorosilicone rubber with electromagnetic interference (EMI) shielding capabilities. They're used in a wide range of applications, from aerospace and automotive to electronics and telecommunications. One of the key advantages of fluorosilicone EMI gaskets is their excellent corrosion resistance, which makes them suitable for use in harsh environments.

So, what exactly makes fluorosilicone EMI gaskets so corrosion-resistant? Well, it all comes down to the unique chemical structure of fluorosilicone rubber. Fluorosilicone is a type of synthetic rubber that contains fluorine atoms in its molecular structure. These fluorine atoms give the rubber several desirable properties, including excellent chemical resistance, low surface energy, and high thermal stability.

When it comes to corrosion resistance, the fluorine atoms in fluorosilicone rubber play a crucial role. They form a protective barrier on the surface of the rubber, preventing corrosive substances from penetrating and attacking the material. This barrier is highly resistant to a wide range of chemicals, including acids, bases, solvents, and fuels. As a result, fluorosilicone EMI gaskets can withstand exposure to harsh chemicals and environments without deteriorating or losing their sealing and shielding properties.

Another factor that contributes to the corrosion resistance of fluorosilicone EMI gaskets is their low surface energy. Fluorosilicone rubber has a very low surface energy, which means that it repels water and other liquids. This property helps to prevent the formation of corrosion-causing electrolytes on the surface of the gasket, further enhancing its corrosion resistance.

In addition to their chemical and surface properties, fluorosilicone EMI gaskets are also designed to be highly durable and long-lasting. They can withstand repeated compression and expansion cycles without losing their shape or elasticity, ensuring a reliable seal over an extended period of time. This durability is especially important in applications where the gaskets are exposed to mechanical stress or vibration, as it helps to prevent the formation of leaks and gaps that could allow corrosive substances to enter the system.

Now, let's take a closer look at some of the specific types of corrosion that fluorosilicone EMI gaskets can resist.

Chemical Corrosion

As mentioned earlier, fluorosilicone rubber is highly resistant to a wide range of chemicals. This makes it suitable for use in applications where the gaskets are exposed to corrosive chemicals, such as acids, bases, solvents, and fuels. For example, in the chemical processing industry, fluorosilicone EMI gaskets are commonly used to seal pipes, valves, and other equipment that come into contact with corrosive chemicals. The gaskets help to prevent leaks and spills, ensuring the safety and efficiency of the process.

Galvanic Corrosion

Galvanic corrosion occurs when two different metals are in contact with each other in the presence of an electrolyte. This can lead to the formation of an electrical current, which causes one of the metals to corrode. Fluorosilicone EMI gaskets can help to prevent galvanic corrosion by acting as an insulating barrier between the two metals. The gaskets prevent the flow of electrical current, reducing the risk of corrosion and extending the lifespan of the equipment.

Oxidation

Oxidation is a type of corrosion that occurs when a metal reacts with oxygen in the air. This can cause the metal to rust or corrode, leading to a loss of strength and integrity. Fluorosilicone EMI gaskets can help to prevent oxidation by providing a protective barrier between the metal and the air. The gaskets prevent oxygen from reaching the metal surface, reducing the risk of oxidation and corrosion.

Environmental Corrosion

In addition to chemical and galvanic corrosion, fluorosilicone EMI gaskets can also resist environmental corrosion. This includes corrosion caused by exposure to moisture, saltwater, and other environmental factors. For example, in marine applications, fluorosilicone EMI gaskets are commonly used to seal hatches, doors, and other openings on ships and boats. The gaskets help to prevent water from entering the vessel, reducing the risk of corrosion and damage to the equipment.

Now that we've covered the basics of corrosion resistance in fluorosilicone EMI gaskets, let's talk about some of the factors that can affect their performance.

Temperature

Temperature can have a significant impact on the corrosion resistance of fluorosilicone EMI gaskets. At high temperatures, the rubber can become more susceptible to chemical attack and oxidation. This is because the increased temperature can cause the rubber to expand and contract, which can lead to the formation of cracks and gaps in the gasket. To ensure optimal performance, it's important to choose fluorosilicone EMI gaskets that are rated for the specific temperature range of your application.

Chemical Exposure

The type and concentration of chemicals that the gaskets are exposed to can also affect their corrosion resistance. Some chemicals are more aggressive than others and can cause the rubber to degrade more quickly. It's important to choose fluorosilicone EMI gaskets that are specifically designed to resist the chemicals that they will be exposed to in your application.

Mechanical Stress

Mechanical stress can also have an impact on the corrosion resistance of fluorosilicone EMI gaskets. If the gaskets are subjected to excessive compression or tension, they can become damaged or deformed, which can reduce their sealing and shielding properties. To ensure optimal performance, it's important to choose fluorosilicone EMI gaskets that are designed to withstand the mechanical stress of your application.

Installation

Proper installation is crucial for ensuring the corrosion resistance of fluorosilicone EMI gaskets. If the gaskets are not installed correctly, they may not form a proper seal, which can allow corrosive substances to enter the system. It's important to follow the manufacturer's installation instructions carefully and to use the appropriate tools and techniques to ensure a proper fit.

In conclusion, fluorosilicone EMI gaskets offer excellent corrosion resistance, making them a popular choice for a wide range of applications. Their unique chemical structure, low surface energy, and high durability make them highly resistant to a variety of corrosive substances and environments. However, it's important to choose the right gaskets for your specific application and to ensure proper installation and maintenance to ensure optimal performance.

If you're in the market for high-quality fluorosilicone EMI gaskets, look no further! We offer a wide range of gaskets that are designed to meet the specific needs of your application. Our gaskets are made from the highest quality materials and are manufactured using the latest technology and techniques to ensure superior performance and reliability.

Whether you're looking for Peroxy Vulcanized Fluororubber Raw Rubber or Bisphenol Vulcanized Fluororubber Raw Rubber, we've got you covered. Our team of experts is always available to help you choose the right gaskets for your application and to provide you with the support and guidance you need to ensure a successful installation.

So, what are you waiting for? Contact us today to learn more about our fluorosilicone EMI gaskets and to discuss your specific requirements. We look forward to working with you!

References

• "Fluorosilicone Rubber: Properties and Applications" - Rubber World Magazine
• "Corrosion Resistance of Elastomers" - Handbook of Elastomers, Second Edition
• "EMI Shielding Gaskets: Design and Selection" - IEEE Transactions on Electromagnetic Compatibility