Protecting Wastewater Infrastructure from H2S Corrosion. 

Wastewater infrastructure operates in some of the harshest environments in the built world. Moisture, bacteria, confined spaces, fluctuating flows, organic material, and limited ventilation can all contribute to one of the most persistent threats in sewer systems: hydrogen sulfide (H2S) corrosion. 

H2S gas forms when organic matter breaks down under low-oxygen conditions. Once released into the airspace of a sewer structure, it interacts with moisture and bacteria on exposed surfaces. Over time, that process creates sulfuric acid, which attacks concrete, mortar, steel, and other infrastructure materials, directly leading to asset corrosion. 

For municipalities, engineers, utility managers, and contractors, H2S corrosion is more than a maintenance concern. Left untreated, it can lead to softened concrete, exposed aggregate, cracking, spalling, reduced wall thickness, infiltration and inflow concerns, structural compromise, odor complaints, safety risks, emergency repairs, and shortened asset life. 

Sprayroq helps communities address these challenges with trenchless rehabilitation solutions designed for demanding wastewater environments. SprayWall, Sprayroq’s flagship product, is a spray-applied polyurethane lining system that restores structural integrity while providing corrosion resistance and infiltration control. 

SprayWall is designed for use across a wide range of wastewater and infrastructure assets, including manholes, lift stations, wet wells, pipelines, digesters, headworks, tanks, and treatment structures. By creating a protective barrier between the corrosive environment and the underlying substrate, SprayWall helps extend service life and reduce the need for disruptive excavation or full replacement. 

In many cases, corrosion protection alone is not enough. When assets have already experienced section loss, cracking, deformation, or substrate deterioration, they may require a structural rehabilitation approach. SprayWall is engineered to help reinstate structural integrity while protecting the assets from future corrosion. 

H2S corrosion may start quietly, but its impact can be significant. By identifying corrosion early and investing in proven trenchless rehabilitation solutions, municipalities and utilities can protect the critical infrastructure their communities rely on every day. 

Contact Sprayroq today to learn how SprayWall can help protect wastewater assets from corrosion, structural deterioration, and long-term failure.