SeaShield 500™ system provides long-term corrosion protection at Opua Marina

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Project Data

In July 2012, Denso Australia was tasked with providing a long-term corrosion protection solution for a steel pile design which required us to accomodate for a floating wharf.

The project site was located at Opua Marina in New Zealand – a location which is part of the Bay of Islands. After assessing the client’s needs, it was decided that the SeaShield 500 Series system would be the best fit for the job as this would allow us to protect the steel pile against the abrasive action of the floating wharf’s collars, and tint the jacket to best match the colour scheme of the Marina.

Working with the Marina’s engineers, Denso Australia were able to provide a solution to lower the profile of the High Density Polyethylene (HDPE) ring and modify it to accept the jacket and jacket join. This left enough room to install a 3mm jacket and 12.5mm annulus within which to fill the epoxy grout. It was decided, due to working depths and time constraints, to pour a Denso 311 Epoxy plug and then pump the 550 Underwater Epoxy grout.

Fast forward to late 2023, an inspection was conducted. Here, it was found that the SeaShield 500 Series system had excelled in its protective role. The FRP (Fibre Reinforced Plastic) showed minimal abrasion, impact, and gouge damage. Additionally, the jetty pile protected by the system was in excellent condition, thus reaffirming the 500 Series system’s exceptional performance in mitigating corrosion in the splash zone.