Keywords
Citation
(1999), "Denso Seashield protection for Cromer lifeboat station", Anti-Corrosion Methods and Materials, Vol. 46 No. 1. https://doi.org/10.1108/acmm.1999.12846aab.022
Publisher
:Emerald Group Publishing Limited
Copyright © 1999, MCB UP Limited
Denso Seashield protection for Cromer lifeboat station
Denso Seashield protection for Cromer lifeboat station
Keywords Denso, Marine corrosion, Steel
Winn & Coales Denso SeaShield 100 system has been chosen for anti-corrosion protection of 38 steel piles supporting Cromer's new lifeboat house, as well as the slipway (Plate 1). It will continue to use an existing Tyne lifeboat until a new design craft is available.
The old lifeboat station was taken away to be used as a RNI museum in Suffolk, with the new station being built on the site by contractors May Gurney (Construction) Ltd. The SeaShield 100 was recommended by the consultants, Posford Duvivier of Haywards Heath, as a result of their previous experience with Denso protective systems.
Plate 1 Denso SeaShield 100 system
protects the steel piles of Cromer's new lifeboat house
The protection of structures in the splash and inter-tidal zones presents many unique problems. Winn & Coales worked closely with their six overseas companies to develop a range of SeaShield systems to meet the demands of specific marine environments. The common and vital element of all the SeaShield systems for steel and concrete pile protection is the waterproof anti-corrosion layer placed over the substrate. This consists of a petrolatum based primer containing water displacing agents, corrosion inhibitors and wide spectrum biocide. Over the primer is wrapped a double layer of tape coated with a petrolatum compound, thus isolating the piles from the surrounding environment.
The SeaShield 100 system also includes an ultraviolet resistant, high density polyethylene outer cover with excellent impact, abrasion and chemical resistance. The covers are then secured by circumferential bands and buckles made from 316 grade stainless steel.
May Gurney constructed a special steel cage for their SeaShield applicators. This went round each pile and could be flooded so that the cage sank, thus enabling the piles to be wrapped below water.