1. Steel pipe anti-corrosion generally adopts two common main methods: external coating and cathodic protection.

2. Although most of the surface of the steel pipe is covered by the coating, a slight leak will cause an incredible corrosion rate, even perforation or cracking. Therefore, in steel pipe anti-corrosion, the coating system and cathodic protection are generally used in combination to achieve a coverage rate of 99.99% to avoid unimaginable consequences in the future.

3. The cathodic protection used for steel pipe anti-corrosion is divided into dedicated cathodic protection and impressed current cathodic protection.

4. The purpose of the coating used for 3PE anti-corrosion steel pipe anti-corrosion is to form a continuous covering layer of insulating material, which directly insulates the electrolyte in direct contact with the metal so that it cannot produce a correct electrolytic reaction.

5. The disconnected points in the coating laying process are called leaks. The main reason for the occurrence is that it occurs during the coating, transportation, or installation process, or it may be caused by coating aging, soil stress, or the movement of the pipeline in the soil, and the damage caused by the third party is not discovered in time.