Do galvanized pipes need to be anti-corrosion when buried underground?

Whether anti-corrosion treatment is required for buried galvanized pipes depends on the specific use environment and needs.

If the galvanized pipe is only used temporarily and the time is relatively short, then anti-corrosion treatment is not required. However, if galvanized pipes are to be used for a long time, especially in soil, they will need to be treated with anti-corrosion treatments. Because the soil contains acid, alkali, water and other substances, these substances will react with the galvanized layer, causing the galvanized layer to corrode. The longer the time, the deeper the corrosion will be, until it is perforated, and the performance will be greatly reduced, affecting normal use.

Common anti-corrosion treatment methods include external anti-corrosion coating and lining anti-corrosion layer. The external anti-corrosion coating can be coated with epoxy resin, polyethylene and other materials to form a protective layer to prevent corrosive substances in the soil from contacting the surface of the steel pipe. The anti-corrosion lining layer is a layer of corrosion-resistant material coated inside the steel pipe to prevent the medium inside the pipe from corroding the steel pipe.

Therefore, in order to ensure the long-term use and safety of galvanized pipes, it is generally recommended to carry out necessary anti-corrosion treatment when used underground.

Editor: Lucas

Mail: lucas@yangtzesteel.com