KHIA headerKnow-How in Action


Belzona® Rebuilds Eroded Stern Tube Sealing Face



Marine (MRNE)



Ships and Offshore Structures (SOS)


Customer Location:

Maersk Lines Container Ship, Lisnave ShipYard, Setubal, Portugal


Application Date:

April 2014


Application Situation:

Stern Tube of container ship.



Galvanic corrosion damage on the boss sealing surface of stern tube system



Belzona 1311 (Ceramic R-Metal)





Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflet SOS-1.


Belzona Facts:

The traditional solution to this problem would involve precision machining of the boss surface. The initial preparation, setting up of equipment and the subsequent inspection all put together the estimated repair time for the alternative arrangement was about 8 days. The Belzona application and assembly was completed in 36 hours and inspection subsequent to the application and curing indicated a good even coat of Belzona. The system was assembled and checked for tightness satisfactorily. In normal running conditions, this repair will perform as good or better than the normal arrangement as the Belzona provides an erosion-corrosion resistant surface and being an electrical insulator will eliminate potential for galvanic corrosion in this area.  The repair was completed with class ABS supervision.


Photographs Description

  1. Stern Tube with Galvanic Corrosion
  2. Stern Tube after preparation with MBX Bristle Blaster
  3. Stern Tube after applying Belzona 1311
  4. Completed repair after polishing the Belzona 1311
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