Denso Void Filler protects naval dockyard anchors
Denso Void Filler protects naval dockyard anchors
Keywords: Denso, Marine corrosion, Filling
Winn & Coales Denso Void Filler has been used for some time at Devonport Royal Dockyard, UK for protecting rock anchors from the corrosive conditions of sea water. It is applied within the sleeves covering the segments of the anchors, as well as within the anchor heads, thus preventing the ingress of both water and air, the necessary prerequisites for corrosion (Plate 1).
Plate 1The nuclear-powered attack submarine HMS Trafalgar being manoeuvred into Devonport Royal Dockyard's 15 Dock for refit. The rock anchor pits in the dock are being protected with Denso Void Filler
Now, as part of DML's 15 dock modernisation project for Royal Navy attack submarines at Devonport Royal Dockyard, as a result of experience of its effectiveness, some 23 of the 206 anchor pits, measuring 1m x 1m x 600mm, have so far been filled with Denso Void Filler. They are then covered with metal plates so that in the dry-dock condition they can be walked and driven over. Eventually, all anchor pits will be filled with void filler.
Denso Void Filler is a petrolatum compound that contains additives to displace moisture and inhibit corrosion. It was injected hot into the anchor pits from a heated tank with its own pumping system specifically designed for Void Filler application by Winn & Coales Engineering Division.
The product has been used on a number of major international construction projects, including the protection of all the stay cables and internal/external post tensioning steel strands on the Second Severn Crossing.
Further details are available from Winn & Coales (Denso) Ltd. Tel: +44(0) 181 670 7511; Fax: +44 (0) 181 761 2456.
