Chlorine in swimming pool water
Can the water in chlorinated swimming pools lead to chloride induced corrosion to the concrete´s embedded reinforcement?
This is very unlikely to occur.
The aim of dosing swimming pool water with ´chlorine´ is to achieve a ‘free chloride residual’ of approximately 1ppm. Even with a heavy bathing load the dosage is unlikely to exceed 5ppm, far lower than seawater. The Atlantic sea for example, has a typical chloride content of 18,000 ppm, whilst the Mediterranean sea has a typical chloride content of 21,000 ppm.
Values taken from the book ‘Swimming Pools’ by P Perkins (Taylor & Francis, 2000)