QUANTITATIVE DETERMINATION METHOD OF COATING DEGRADATION OF BURIED PIPELINE BY ACCELERATED ELECTROCHEMICAL TECHNIQUE

摘要

present invention is related to the electrochemical pipe rust using an accelerated method for the quantitative evaluation methods of coating degradation as preparation step of preparing a corrosion-resistant coating coated on the surface of the coating material and the non-metal base material made of a base material of a metal; Defect generation unit removing a surface portion of the coating material to produce an artificial defect; Was placed in each of the coating material and the non-artificial leachate coating material, respectively, to accelerate the positive or negative potential applied alternating step for coating the coating material and the ratio; Characterized in that comprises a ;; the coating material and the coating material is applied to a non-alternating voltage to FIG degradation evaluation step of evaluating the deterioration state of the time subjected to the acceleration step by impedance spectroscopy tests for each. According to the present invention, by making the most similar to an artificial environment to create a leachate and physical degradation corrosive environment, and also can accurately predict the degradation of the coating pipe is buried underground in a real environment, the anode reaction and the cathode reaction at the same time it is possible to reproduce all of the actual coating degradation mechanism of the oxide cathode stripping bulge phenomenon through accelerated degradation test Using optimized polarization method of applying the positive potential, there is an advantage in that the deterioration of the pipe products also can accurately predict. Furthermore, can be optimized by impedance spectroscopy test accurately measure the peeling area, and the like protection coating efficiency, for the coating also between different materials through which the deterioration, the electrochemically quantitative comparison has the advantage that can facilitate .