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Belzona® Repair To Ferry's Propulsion System



Marine (MRNE)



Ships and Offshore Structures (SOS)


Customer Location:

Ferry operator, Scotland


Application Date:

February 2007


Application Situation:

Voith Schneider propulsion unit of a ferry.



Erosion-corrosion on the face and bore of the casing, due to sea water corrosion and erosion from entrained sand. If allowed to continue the casing could be perforated leading to oil leakage.



Belzona® 1311 (Ceramic R-Metal)

Belzona® 1341 (Supermetalglide)



Mild steel


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflets SOS-1 and SOS-2. Pitted areas were rebuilt with Belzona® 1311 before receiving 2 coats Belzona® 1341 for overall erosion-corrosion protection.


Belzona Facts:

Previously, this client had experienced erosion-corrosion on another of their units. This unit had been welded, incurring major problems of distortion. The Belzona alternative solution, which was completed in two days, avoided any risk of distortion. Replacement of the whole casing would have been a very expensive option. The client was so pleased with the Belzona option he commissioned a similar application on another Voith casing in 2009, which has also been successful.


Photographs Description

  1. Close view of the erosion-corrosion problem  
  2. Eroded areas rebuilt with Belzona® 1311 
  3. Application of a final blue coat of Belzona® 1341 to protect the casing against further erosion-corrosion problems  
  4. 2009 application - Belzona® 1341 applied on the casing
Case study pic one


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