The chemical properties of carbon fiber and carbon recognition, it can be strong oxidants in addition to oxidation, the general alkaline is inert. In the air temperature above 400 ℃ when there is significant oxidation, the formation of CO and CO2. Carbon fiber on the general organic solvents, acids, alkalis have good corrosion resistance, insoluble does not expand, corrosion resistance outstanding, there is no rust problem. Some scholars in 1981 will be PAN-based carbon fiber immersed in a strong alkali solution of sodium hydroxide, the time has passed 30 years, it remains fiber morphology. But its impact resistance is poor, easy to damage, under the action of strong acid oxidation, carbon fiber electromotive force is positive, while the electromotive force of aluminum alloy is negative. When the carbon fiber composite materials and aluminum alloy with the combination of metal carbonation occurs, carburizing and electrochemical corrosion. Therefore, the carbon fiber before use to be surface treatment. Carbon fiber is also resistant to oil, radiation, anti-radiation, absorption of toxic gases and slow neutrons and other characteristics.