KHIA headerKnow-How in Action


Belzona® Rebuilds And Protects Turbine Runner



Power (POWR)



Centrifugal Pumps (CEP)


Customer Location:

Hydroelectric Plant, Jokkmokk, Sweden


Application Date:



Application Situation:

Two impeller runner blades had suffered severe cavitation and erosion damage.



Constant use had damaged the vulnerable cast iron substrate of the impellers. The client needed a quick, long-term solution to avoid downtime to their plant.



Belzona 1311 (Ceramic R-Metal)

Belzona 1321 (Ceramic S-Metal)



Cast iron


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflets CEP-1 and CEP-3. Surfaces were grit blasted prior to rebuilding with Belzona 1311 to restore profiles and coating with Belzona 1321 to provide long-term protection.


Belzona Facts:

The Belzona solution is cold-applied and simple to use, which meant that repairs and the application could be performed in-situ, avoiding costly disassembly work which would force a long downtime period. Force curing Belzona allowed the plant to return to operational status as quickly as possible, whilst the Belzona application offers a long-term, durable solution.


Photographs Description

  1. Turbine housing entrance
  2. Cavitation damage to the runner
  3. Close-up of the damage
  4. Completed application
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: