KHIA headerKnow-How in Action

VOL XXVI, NO 68

Belzona® Repair & Protection Of Francis Turbine Runners

 
 

Industry:

Power (POWR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Hydroelectric power plant, Barcelona, Spain

 
 

Application Date:

November 2011

 
 

Application Situation:

Three Francis turbines severely damaged.

 
 

Problem:

The turbines were suffering from corrosion and erosion cavitation damage in the runner blades which caused holes.

 
 

Products:

Belzona® 1111 (Super Metal)
Belzona® 1341 (Supermetalglide)

 

Substrate:

Steel

 
 

Application Method:

The application was carried out in accordance with the Belzona Know-How System Leaflets CEP-1, CEP-3 and CEP-5. Firstly, the holes and metal losses were repaired with Belzona® 1111 combined with a metallic mesh tobridge and strengthen the holed areas. Once the damaged areas had been repaired, the turbine runners were completely coated with Belzona® 1341.

 
 

Belzona Facts:

The client has been doing this type of repair and coating application on his Francis turbines for more than 30 years using Belzona products. Therefore, no alternative repair was considered. The application was completed within one week, ensuring the client could continue to supply electricity to their customers with minimal disruption.

 
 

Photographs Description

Damaged turbine Close-up of the damage Belzona® 1111 used in combination with a metallic mesh Application completed with Belzona® 1341

 
Case study pic one

 

 
 Case study pic two

 

 
 Case study pic three

 

 
 Case study pic four

 

 
 
For more information about Belzona visit: www.belzona.com