BELZONA REPAIRS WATER JET FLANGE AREA
Industry: Marine (MRNE)
Application: VPF-Valves, Pipes and Fittings (VPF)
Substrate: Aluminium
Customer Location: Naval shipyard, Vaxholm, Sweden
Application Date: December 2011
Products:
Belzona® 1111 (Super Metal)
Belzona® 1341 (Super metalglide)
Problem: The water jet tunnel was suffering from cavitation and corrosion the flange holding the impeller housing in place. The most severe damages were found on the flange face and extended 20 cm inwards. Additionally the flange face was found to be distorted.
Photograph Descriptions
- The damaged water jet unit
- A close-up of the damage
- Machining down the flange surface after rebuilding with Belzona® 1111
- completed application after coating with Belzona® 1341
Application Situation
Rolls Royce water jet propulsion unit on combat boat built 2002. Total time in water almost 6 years.
Application Method
Application was carried out in accordance with Belzona Know-How system Leaflets VPF-1 & 2. Flange face and cavitation erosion was rebuilt with Belzona® 1111. critical clearances were machined before applying Belzona® 1341 for overall erosion corrosion protection.
Belzona Facts
This ship yard has previously used the same method for repairs on water jet propulsion units with great success. Belzona avoids hot work that could create further distortion and provides excellent corrosion and cavitation protection in water jet propulsion systems.
