Concrete sewer manholes are highly prone to corrosion due to acid attack. The corrosion mechanism is fairly simple:
One of the solutions to stop corrosion is by spraying PROTECTA-Mag™ (Magnesium Hydroxide coating) on the surface of concrete sewers.
PROTECTA-Mag™ prevents corrosion by raising surface pH, thus neutralising acids and inhibiting the formation of acid-producing bacteria. Monitoring results indicate that PROTECTA-Mag™ coating continues to protect the integrity of the concrete walls of the manhole, in spite of continuous sewer flow, for up to 7 years*.
Compared to existing corrosion protection technologies like plastic lining,
PROTECTA-Mag™ spray coating is 7 times cheaper
over the life cycle of the asset and does not require flow diversion or man entry for application.
Calix's trailer-mounted, purpose-built PROTECTA-Mag™ rig is used to carry out Vertical Spray Operations. A crew of two, trained for the spray application, traffic control and confined space entry (if required) carry out the application.
PROTECTA-Mag™ is sprayed on the concrete surfaces of the man hole using a high pressure air less applicator. For manholes up to 3 metres in depth, spray is carried out using a lance.
For deeper manholes a spray nozzle on a special winch is lowered into the manhole to carry out the cleaning and spraying operation.
Our AS/NZS ISO 9001 certified quality system and safety, health and environmental management system are vital elements of our engineering and quality services.
Calix has established a network of local distributors and partners who can deliver PROTECTA-MagTM across Australasia, to ensure you receive excellent customer service and support, wherever you are located.
Would you like a quote or more information about any of our products, solutions or services?
If you'd like to locate a Calix partner near you, contact us now.