3PE Coated Steel Pipe Corrosion Protection Methods
2022-05-07
3PE-coated steel pipe Anti-corrosion method:
1. 3PE-coated steel pipe Generally, two primary methods are employed: external coating and cathodic protection.
2. Although 3PE-coated steel pipe Most of the exterior is covered by a coating, but even minor leaks can lead to extremely rapid corrosion, potentially causing pitting or cracking. Consequently, pipeline corrosion protection typically employs coating systems and cathodic protection to achieve 99.99% coverage, thereby preventing unimaginable consequences in the future.
3. The selected 3PE-coated steel pipe Cathodic protection for corrosion prevention is categorized into dedicated cathodic protection and impressed-current cathodic protection.
4.3 Selection 3PE-coated steel pipe The anti-corrosion coating forms a continuous insulating layer, directly isolating the electrolyte in contact with the metal to prevent undesirable electrochemical reactions.
5. The points where the coating is interrupted during application are referred to as leakage points. The primary causes occur during painting, transportation, or installation. They may also arise due to coating aging, soil stresses, or pipeline movement within the soil. Damage caused by third parties often goes undetected in a timely manner.
6. Principle of impressed‑current cathodic protection: After an alternating current is applied to protect the metal and induce cathodic polarization, corrosion on the structure ceases when the potential of all anodes reaches the highly active open‑circuit potential of the cathode.
7. 3PE-coated steel pipe In addition, the components of impressed current cathodic protection include a rectifier and a voltage regulator.
8. Rectifier: Converts alternating current (AC) into direct current (DC).
9. 3PE-coated steel pipe Potentiometer: an electronic device that can actively regulate the electrical potential stability of a pipeline.
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