BELZONA BONDS SPADE RUDDER BEARING ON COASTER

KHIA ID: 4157
Industry: Marine (MRNE)
Application: SOS-Ships and Offshore Structures (SOS)
Substrate: Steel and Bronze
Customer Location: Scotland, UK
Application Date: September 2002
Products:

Belzona® 1221 (super E Metal) Belzona® 1321 (Ceramic S Metal)

Problem: Significant Galvanic Corrosion - from 3 to 7mm had occured, causing the bronze bush to be unsupported. This was a spade rudder and the forces on the bearing were great.
Photograph Descriptions
  1. Vessel prepared for works in drydock 
  2. Top of bearing sealed using Belzona® 1221  
  3. Injection of Belzona® 1321 into the space  
  4. Completed works. The injection plugs are removed at the same time as the rudder is assembled.
Application Situation
Spade rudder bearing on coastal ship.
Application Method
Application was carried out in accordance with Belzona System Leaflet SOS-9. The top of the bearing was sealed using the Belzona® 1221, and, due to the overhang over the top of the bearing, capillaries were set in to ensure good venting during the injection process.
Belzona Facts
All works were carried out within one day and witnessed by the Lloyds Register Surveyor. 12 kg of Belzona® 1321 was required to secure the bearing into position, providing a 100% contact between the bearing and the housing, and compressive load bearing capability significantly above the 10N/mm2 required.
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