Due to its low quality and high strength, carbon fiber has attracted much attention in high-end fields. In fact, carbon fiber data also has a very useful feature, that is corrosion resistance. Maybe many people don't know the excellent corrosion resistance of carbon fiber. Let's introduce this characteristic in detail.
In theory, carbon fiber has better corrosion resistance
There was a case before about a production well in Binnan of Shengli Oilfield. Due to the high sulfur content, the steel brace on the production machine was corroded in less than two months, so it was unable to operate and had to be shut down. After analysis and discussion, carbon fiber materials were selected to build the strut top, which was still stable after more than 600 days of continuous operation.
This is an excellent example of carbon fiber materials with good corrosion resistance. In fact, those who have known about carbon fiber data should know that carbon fiber is a stable structure similar to graphite crystal formed by high temperature carbonization of fiber data at 2000 ~ 3000 ℃, which has good medium corrosion resistance.
After testing, carbon fiber data can work normally in 50% hydrochloric acid, sulfuric acid and phosphoric acid, adhere to good elastic modulus and strength, and will not deform or damage itself.
The corrosion resistance of useful medium carbon fiber data will be affected
The corrosion resistance of carbon fiber data itself is good, which is on the theoretical level. When it is really applied to practice, the corrosion resistance may be affected to a certain extent. This is because the corrosion resistance of the resin matrix part of the carbon fiber composite material is not strong, and the strength of the corrosion resistance will vary with the resin matrix used.
In addition, the corrosion resistance of carbon fiber composite materials will also change in different environments and working hours. For example, the strength of
Carbon Fiber Reinforced epoxy composites will not change after long-term storage in temperate and inland areas; However, the aging degree is more significant in sub humid and hot areas and coastal areas.
Improving processing technology can improve the corrosion resistance of carbon fiber products
If you want to improve the corrosion resistance of carbon fiber composite materials, you can start from many aspects. When planning and using carbon fiber composite materials, the resin matrix with macromolecular structure including body structure, benzene ring and heterocycle, which can form hydrogen bonded crystalline polymer between molecules, is the best choice to enhance the corrosion resistance of carbon fiber composite materials.
The processing technology of other carbon fiber composite materials also has an impact on corrosion. Take epoxy carbon fiber composite materials as an example. In the curing process, the interface state and the composition of the interface area of carbon fiber are the key to improve the corrosion resistance of its products.
After the surface treatment of carbon fiber composite materials, it can not only protect the surface of the fiber, but also enhance the adhesion of the fiber and resin interface, effectively avoid the invasion of moisture or other harmful media, and improve the corrosion resistance. By improving the interface bonding function and improving the interface bonding strength of composite materials, the porosity and structural defects can be reduced, and the corrosive medium is not easy to penetrate and disperse.
