Suqian 3pe anti-corrosion steel pipe

Anti-corrosion steel pipe layer Manager Wang
The relationship between the protective potential of the outer polyethylene middle layer and the bottom epoxy powder and its patching and reinforcing materials in aqueous solution and soil media and cathode stripping was obtained. The anti-corrosion steel pipe layer and its patching The critical protective potential of the reinforcing material for cathodic peeling was determined by measuring the electrochemical impedance spectroscopy of the protective current at different protective potentials. The changes in the protective current and resistance of the anticorrosive layer after cathodic peeling of the anticorrosive layer and its reinforcing material were obtained. According to the rules, the anti-electrolyte penetration performance of the anti-corrosion layer under different potentials was analyzed. The products in the cathode stripping area were analyzed and identified using an infrared spectrometer and a comprehensive thermal analyzer. The research results show that the critical value of cathodic protection potential in aqueous solution and soil medium for defective anti-corrosion layers and their repair and reinforcing materials is the cut-off potential. When the cathodic protection cut-off potential is lower than the cathodic protection potential, the cathode of the anti-corrosion layer between the anti-corrosion layer and the substrate Peeling is significantly intensified. The soil experiment results show that when the average current density of cathodic protection reaches 100%, the anticorrosive layer begins to exhibit cathodic peeling. When the average current density increases sharply to /, the cathodic peeling of the anticorrosive layer is significantly intensified. As the cathodic protection potential shifts negatively, the electrochemical impedance spectrum becomes smaller, indicating that the anti-cathode stripping performance and electrolyte penetration resistance of the anti-corrosion layer become worse. After the cathodic peeling of the anti-corrosion layer occurs, the value of the environment increases, changing from neutral or weakly acidic to alkaline. In the area where cathode peeling occurred, a white powdery product was found to be generated, which was determined to be a mixture of calcium and magnesium ion precipitates and epoxy polymer powder.