1. Steel pipe corrosion protection generally uses two main methods: external coating and cathodic protection.
2. Although most of the surface of the steel pipe is covered by the coating, even a small leak can lead to an incredible corrosion rate, even perforation or cracking. Therefore, in steel pipe corrosion protection, the coating system and cathodic protection are generally used in combination to achieve a 99.99% coverage rate to avoid unimaginable consequences in the future.
3. Cathodic protection used for steel pipe corrosion protection is divided into sacrificial cathodic protection and impressed current cathodic protection.
4. The purpose of using a coating for 3PE anti-corrosion steel pipes is to form a continuous insulating layer, directly insulating the metal from the electrolyte in direct contact, thus preventing proper electrolytic reactions.
5. Discontinuities in the coating application process are called leaks. These leaks mainly occur during coating, transportation, or installation, and may also be caused by coating aging, soil stress, or movement of the steel pipe in the soil, without timely detection of third-party damage.
Post time: Mar-03-2026