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Belzona® Bonds Spade Rudder Bearing On Coaster



Marine (MRNE)



Ships and Offshore Structures (SOS)


Customer Location:

Scotland, UK


Application Date:

September 2002


Application Situation:

Spade rudder bearing on coastal ship.



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.



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



Steel and Bronze


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.


Photographs Description

  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.
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