What are the anti-corrosion treatment methods for ductile iron pipes?

Ductile iron pipes are already a common fixture in real-world water supply systems, but how many people know their history?

Compared to seamless steel pipes and stainless steel pipes, ductile iron pipes, although not as strong as steel pipes in terms of material strength, offer extremely high operational safety and resistance to water hammer in municipal water supply systems due to their greater wall thickness, strong structural rigidity, and low allowable stress. Their larger effective inner diameter helps improve water transmission efficiency, giving them outstanding overall pressure resistance and long-term reliability in low-to-medium pressure water supply applications.

In 1922, cement lining was first applied to the inner wall of ductile iron pipes, improving water quality. In 1948, the first ductile iron pipe was successfully trial-produced. Gray iron and ductile iron pipes are corrosion-resistant in underground environments, resulting in a long service life. Since 1958, polyethylene-coated and zinc-asphalt-sprayed water pipes have been successfully installed in areas with highly corrosive soils, providing excellent corrosion protection. Ductile iron pipes offer advantages such as thin walls, high strength, excellent toughness, strong corrosion resistance, and easy installation.

What are the anti-corrosion treatment methods for ductile iron pipes?

As is common knowledge in water supply projects, ordinary materials are prone to corrosion and deterioration. Therefore, when using ductile iron pipes for water supply pipelines, addressing this corrosion issue is paramount to ensure longevity. Here are several effective methods for treating ductile iron pipe corrosion.

1. Asphalt Paint Coating

2. Cement Mortar Lining (Special Coating)

3. Epoxy Coal Tar Coating

4. Epoxy Ceramic Lining

5.Aluminate Cement Coating and Sulfate Cement Coating

Both of these special cement coatings are suitable for internal corrosion protection of ductile iron pipes used in sewage pipelines, improving their resistance to corrosion from acidic and alkaline components in sewage.

Ductile Iron Pipe Suppliers & Manufacturers

Baowi Steel is a professional supplier of ductile iron pipes. The company is dedicated to providing high-quality ductile iron pipes for municipal water supply, drainage, gas, and industrial transportation systems. Leveraging a strict quality management system and comprehensive testing equipment, Baowi Steel not only ensures the high strength and corrosion resistance of its products but also offers solutions tailored to customer needs across multiple specifications and standards. Over the years, the company has earned widespread recognition from both domestic and international customers for its stable supply capabilities and high-quality service.