The three areas of vulnerability in marine settings

Concrete is constantly exposed to the elements, including water, chemicals, and various weather conditions. Despite the material’s raw strength, these can all take their toll on it. Of course, there are measures in place to deal with such situations. Our corrosion control service is one of them, and is amongst the most important offerings we have.

When you embed steel within concrete, a passive oxide film starts to manifest. As long as the film remains, the steel is insusceptible to corrosion, providing the construct with stability. Yet, once there is contamination, the pH can begin falling. The result is a loss in passivity and corrosion.

Marine settings

We can categorise those zones unguarded against corrosion in a marine setting into three primary locales. You need to understand all of them in order to produce effective control solutions.


The first is the atmospheric zone. This is reinforced concrete found close to the marine setting, but it’s not directly in contact with water. Such aspects normally exhibit modest corrosion rates because of the chloride and airborne moisture.

Splash and tidal

Next we have the splash and tidal zone. You can find it on and around the water line. Usually, we class it as semi-submerged. These areas typically undergo the worst corrosion thanks to the wet/dry cycling, high moisture, and oxygen availability.


Finally, there is the submerged zone. The reinforced concrete you find here has a permanent place underwater. These locations actually experience reduced volumes of corrosion because of the lower oxygen quantities. Nonetheless, even if the corrosion here isn’t that aggressive, the materials are vulnerable black rust.

At Churchill Concrete Technology, we’re aware of the fact that each concrete structure is unique in one way or another. As such, our corrosion control methods are equally as distinct and match your specific requirements.

If there are matters you wish to discuss with us, please contact our establishment.