ASTM G8 "Cathode disbonding of pipeline coatings" stipulates the standard test method for evaluating the cathode disbonding performance of pipeline coatings. The standard specifies the test principle and scope of application, and standardizes the operation procedures such as sample preparation, test environment setting, electrode arrangement, etc. By setting different test conditions (such as temperature, voltage, time), simulate the working conditions of pipelines in the cathode protection environment, and determine the degree of coating disbonding. It provides a technical basis for scientifically evaluating the cathode disbonding performance of pipeline coatings and ensuring the protection mass of pipelines.