KHIA headerKnow-How in Action


Belzona® Ensures Long-Term Protection Of Tugboat Hull



Marine (MRNE)



Ships and Offshore Structures (SOS)


Customer Location:

Marine Division of a Refinery, USA


Application Date:

July 2006


Application Situation:

Hull plates of a 103’ tugboat operated by the refinery



Previous hull coating was 80% disbonded after 24 months. Hull plates were so badly pitted and corroded that abrasive blasting blew through in spots. The Refinery wanted a more durable hull coating.



Belzona 5811 (Immersion Grade)



Carbon steel


Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflet SOS-2. Belzona 5811 was applied via a single-component airless spray.


Belzona Facts:

Belzona has successfully proven to be a high cost-effective solution that has saved the Refinery $168,000 and provided longer longevity than the conventional solvent coating. A 4-year inspection found the majority of the original coating in a perfect condition, still glossy and tightly adherent. During a 7-year inspection, the coating is virtually unchanged from the 4-year inspection with both black and beige coats still present at full thickness. After a 9-year inspection, the application is still perfect and operating.


Photographs Description

  1. Image of hull plates pressure washed and in the process of abrasive blasting
  2. Hull plates coated with Belzona 5811
  3. After 4 years in service, the coating is glossy and tightly adherent
  4. After 7 years in service, the coating is virtually unchanged
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: