KHIA headerKnow-How in Action


Belzona® Protects Offshore Deoiler/Biocide Tank Unit



Oil & Gas (OILG)



Ships and Offshore Structures (SOS)


Customer Location:

Oilfield Operator, North Sea, Norway


Application Date:

October 2016


Application Situation:

Internal coating of deoiler/biocide tank unit on an offhore FPSO



Pitting corrosion in an internal stainless steel tank, due to unprotected surfaces and hazardous chemicals. Weld particles also a possible explanation to the problems.



Belzona 1311 (Ceramic R-Metal)

Belzona 1381



Stainless steel


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflet SOS-2. Following gritblasting, Belzona 1311 was used to fill all pitted areas, mostly in the tank bottom. All tank surfaces were then coated in Belzona 1381. 


Belzona Facts:

As a result of local pitting and possible through wall defects the unit was becoming a safety and an environmental hazard. A solution to repair was required as an alternative to complete removal. Testplates with several Belzona products were tested and kept immersed in the chemical solutions for 2-3 months in order to select the best product, Belzona 1381 was the stand out performer. As a result of the support from Belzona and the performance of the solution, this was the customers first choice for repair. 


Photographs Description

1. Pitted area.

2. Gritblast details.

3. Belzona 1311 applied to pitted areas.

4. Belzona 1381 completed application.

Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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