3PE anti-corrosion steel pipe means a PE steel pipe with three layers of anti-corrosion. 3pe anti-corrosion steel pipe is widely used nowadays, and it is a kind of steel pipe with better anti-corrosion properties. What anti-corrosion materials does the structure of 3pe anti-corrosion steel pipes consist of? What are the principles by which 3pe anti-corrosion steel pipes can prevent corrosion?
1. Pipeline anti-corrosion usually uses two main methods: outer coating and cathodic protection.
2. Although most of the surface of the pipeline is covered by the coating, a slight leak will cause unimaginable corrosion rates, or even holes or cracks. Therefore, in pipeline anti-corrosion, coating systems, and cathodic protection are usually used together to achieve 100% coverage to avoid unimaginable consequences in the future.
3. Cathodic protection used for pipeline anti-corrosion is divided into sacrificial cathodic protection and impressed current cathodic protection.
4. The purpose of using coating for anti-corrosion of 3PE anti-corrosion steel pipe is to form a continuous covering layer of insulating material to directly insulate the metal from the electrolyte in direct contact with it so that the correct electrolytic reaction cannot occur.
5. Discontinuous points during the coating laying process are called leakage points. They are mainly caused by coating, transportation, or installation processes. They may also be caused by coating aging, soil stress, or pipe movement in the soil. No Timely discovery of damage caused by third parties.
6. Principle of impressed current cathodic protection: By applying an amplitude current to the protective metal, through cathodic polarization, when the potential of all cathode points reaches the open circuit potential of the most active anode point, the corrosion on the structure will stop.
7. Components of impressed current cathodic protection: rectifier and potentiostat
8. Rectifier: convert alternating current to direct current.
9. 3PE anti-corrosion steel pipe a> Potentiometer: an electronic instrument that can automatically control the pipeline potential to be constant.
Post time: Sep-06-2023