KHIA headerKnow-How in Action


Belzona® Coats Riser In Splash Zone



Oil & Gas (OILG)



Ships and Offshore Structures (SOS)


Customer Location:

Offshore Platform, Thailand


Application Date:

May 2005


Application Situation:

Corroded riser pipe



The offshore platform was experiencing severe corrosion and wall thickness loss of the riser pipe due to the splash zone area which may ultimately lead to leaks or rupture of the high pressure pipe.



Belzona® 5811 (Immersion Grade)
Belzona® 5831 (ST Barrier)


Wet carbon steel


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflet SOS-21. Belzona® 5811 was applied to the external paint surface above the splash zone. Belzona® 5831 was applied to the external paint surface in the splash zone area.


Belzona Facts:

The repair using conventional paint was very difficult as the splash zone is regularly wet from sea waves and very slow curing. The paint will not properly cure if contaminated by little amount of sea water. Belzona system was chosen for its ease of application and specifically for its surface tolerance and ability to cure under wet conditions.


Photographs Description

  1. Corroded riser pipe
  2. Application of Belzona® 5831
  3. Completed application
Case study pic one


 Case study pic two


 Case study pic three




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