Isle of Wight, UK – Chemical Resistant Lining for a Water Company
In wastewater management, protecting infrastructure from corrosive gases is essential for ensuring longevity and safety. This project on the Isle of Wight demonstrated Total Specialist Maintenance’s (TSM) expertise in applying a chemical-resistant lining for a new wet well constructed for a water company, addressing critical challenges posed by harsh environmental conditions.
The Challenge
The client faced significant risks due to elevated levels of hydrogen sulfide (H2S) gas within the sewer system, compounded by the absence of local chemical dosing. This situation necessitated robust protection against acidic corrosion for the top 2 meters of the wet well and its cover. Key requirements included:
- Preventing Corrosion: The concrete structure was at risk of degradation due to exposure to H2S, which could compromise the integrity of the wet well.
- Ensuring Structural Integrity: It was crucial to maintain the durability of the wet well to ensure its effective operation and compliance with safety standards.
Why Chemical Resistant Lining?
To mitigate the effects of H2S, TSM identified the need for a specialised chemical-resistant lining. This solution provided several advantages:
- Enhanced Protection Against Acidic Corrosion: The chemical-resistant lining acted as a barrier, significantly extending the lifespan of the wet well and preventing premature deterioration.
- Improved Structural Integrity: Effective sealing and coating reinforced the concrete structure, ensuring that it could withstand the harsh conditions typical in wastewater environments.
The Solution: Comprehensive Application
TSM implemented a thorough application process that included:
- Mechanical Preparation: The substrate was meticulously prepared to create a mechanical key, ensuring optimal adhesion of the chemical-resistant coating. This involved cleaning the surfaces of any contaminants and roughening them to enhance bonding.
- Joint Filling: The joints between precast concrete sections were carefully filled using a high-performance concrete repair mortar. This step was essential to enhance the structural integrity of the wet well and prevent any potential weak points where corrosion could initiate.
- Coating Application: A specialised chemical-resistant coating was applied to the top 2 meters of the wet well and its cover. This coating was designed to withstand the corrosive effects of H2S, providing a robust layer of protection that would enhance the longevity of the infrastructure.
- Quality Control: Throughout the application process, TSM conducted rigorous quality control inspections to ensure that all work met stringent industry standards and client specifications. This included checking the thickness and uniformity of the coating to guarantee complete coverage.
Project Management Excellence
TSM’s project management team effectively coordinated all aspects of the application, ensuring that the work was completed on schedule and within budget. The successful execution of this project not only addressed the client’s immediate corrosion issues but also reinforced TSM’s reputation as a leader in industrial maintenance solutions.
Environmental Considerations
Given the nature of the wastewater environment, TSM prioritised the use of environmentally friendly materials during the application process. The selected chemical-resistant lining was formulated to minimise environmental impact while providing superior protection against corrosive gases.
