Carbon fiber square bar Study on corrosion resistance evaluation of

With the increasing requirements of engineering materials, carbon fiber square bar has been widely used because of its high strength, light weight, heat resistance, corrosion resistance and other advantages. Among them, corrosion resistance is a very important indicator, which is widely used in many fields. Therefore, it is particularly important to evaluate the corrosion resistance of carbon fiber square rods.

The corrosion resistance of carbon fiber square bar can be evaluated by many methods, including static immersion method, cyclic polarization method, AC impedance method and scanning electron microscope observation method.

Static immersion method is to test the corrosion performance of carbon fiber square bar in these environments by soaking it in different media. Generally, the selected medium includes strong acid, strong base, hydrochloric acid, etc., and the evaluation is carried out by observing the quality change and surface morphology of carbon fiber square bar.

Cyclic polarization method is to continuously measure the electrode potential and current by cyclically adjusting the potential and current, and finally obtain the electrochemical polarization curve to evaluate the corrosion resistance of materials. The measurement results of this method have high repeatability and accuracy.

AC impedance method is used to analyze the behavior of materials in corrosive environment by applying alternating electric field and measuring electrical parameters such as resistance, capacitance and inductance of samples. This method is simple in operation and short in test time, and is widely used in the study of corrosion properties of materials.

Scanning electron microscope observation method is to evaluate the corrosion resistance of materials by observing and analyzing the surface morphology of samples. This method has the advantages of observing the morphology and analyzing the composition, and the operation is relatively simple. However, its shortcomings are also very obvious. It can only evaluate the surface morphology and lacks the detailed analysis of the internal structure.

The corrosion resistance evaluation of carbon fiber square bar can effectively predict the corrosion of materials in different working environments and provide practical basis for subsequent engineering applications. In the future research, it is necessary to further improve the system of evaluation system and improve the accuracy of evaluation, so as to better provide strong support for the application and development of carbon fiber square bar.