Like any metal structure immersed in a saline environment, metal sheet piling is subject to corrosion. When they are not protected by an anti-corrosion coating or by effective cathodic protection, corrosion occurs on the metal structures, which can cause significant structural damage over the long term: perforations, loss of thickness, leakage of fine particles…
If the sheet pile no longer has sufficient residual thickness, the metal sheet pile curtain may have to be replaced.
This will have serious consequences on :
- the harbor activity
- the marine environment
- the client’s budget
To prevent corrosion and/or limit its spread, Seacure uses the GEOCORAIL process to create a natural rock coating on metal sheet piles. This solution consists of two phases:
Phase 1 – Polarization: To create the rock coating, the metal sheet pile is electrically connected using the GEOCORAIL process, and subjected to an imposed current cathodic protection derivative for around 24 months. The development and propagation of corrosion is then halted.
Phase 2 – Operations : Once a suitable GEOCORAIL coating has been obtained, the electrical system is shut down. The GEOCORAIL coating then acts as a “plaster” on the metal sheet piling.
Thanks to its natural properties, GEOCORAIL significantly reduces :
- the rate of corrosion of the sheet pile
- provides an additional protective layer for the quay
- limits water infiltration
- limits the possible appearance of breaches and cracks
- increases structural strength