[Introduction]Research on corrosion behavior of tank and monitoring its corrosion process are crucial for the operation and safety management of storage and transportation centers due to the complex environmental conditions during the operation of large oil storage tanks and complex corrosion behavior of them in corrosive media such as oil,sediment,and soil. Coulostatic method can be used for real-time corrosion monitoring in complex systems based on its advantages such as fast response,nondestructive testing,high sensitivity,and good reproducibility. However,there are currently few reports on the application of coulostatic method in research of tank corrosion.[Method]The effect of temperature on the corrosion of the tank bottom plate made of 16MnR steel in simulated soil leaching liquor was studied by coulostatic method. In combination of traditional corrosion rate measurement methods including hanging chip method,potentiodynamic polarization method,linear polarization method,and electrochemical impedance spectroscopy with the characterization by scanning electron microscopy (SEM) and X-ray diffraction (XRD),the feasibility of applying the coulostatic method in the corrosion study of bottom plate of oil storage tank was evaluated.[Result]Temperature greatly affected the corrosion of 16MnR steel in the simulated soil leaching liquor,and the corrosion rate was accelerated with the increasing of temperature. The test results of coulostatic method were well consistent with those of the other electrochemical methods.[Conclusion]Coulostatic technology is a highly reliable corrosion detection method,and has promising application prospect in real-time corrosion monitoring on the bottom plate of storage tank in oil storage and transportation centers.
维普
万方数据
