Anti-corrosion measures for ductile iron pipes
1. Asphalt paint coating
The bituminous paint coating is used to transport gas pipelines. Preheating the pipe before painting can improve the adhesion of the asphalt paint and speed up the drying.
2. Cement mortar lining + special coating
This kind of internal anti-corrosion measures is suitable for pipelines transporting sewage, which can improve the anti-corrosion ability of the lining.
3. Epoxy coal tar coating
Epoxy coal tar coating is suitable for both gas pipelines and sewage pipelines. It is a two-component coating that provides high adhesion and a very smooth surface
4. Epoxy ceramic lining
Epoxy ceramic lining is suitable for sewage pipelines and gas pipelines, but due to the difficult manufacturing process and high cost, it has certain limitations in use. Epoxy ceramic lining has high adhesion and finish and is an excellent anti-corrosion coating.
5. Aluminate cement coating or sulfate cement coating
These two kinds of special cement coatings are suitable for the internal anticorrosion of ductile iron pipes for sewage pipelines, and improve the corrosion resistance of acid and alkali components in sewage.