KHIA headerKnow-How in Action

VOL XXVII, NO 1

Belzona® Bonds Spade Rudder Bearing On Coaster

 
 

Industry:

Marine (MRNE)

 
 

Application:

Ships and Offshore Structures (SOS)

 
 

Customer Location:

Scotland, UK

 
 

Application Date:

September 2002

 
 

Application Situation:

Spade rudder bearing on coastal ship.

 
 

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.

 
 

Products:

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

 

Substrate:

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.
 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com