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VOL XV, NO 33

Belzona® Repairs Kaplan Turbine Blades In France

 
 

Industry:

Power (POWR)

 
 

Application:

Centrifugal Pumps (CEP)

 
 

Customer Location:

Electric supply company in France

 
 

Application Date:

February 2000

 
 

Application Situation:

Kaplan turbine hydoelectric power station on the Moselle River in France.

 
 

Problem:

Erosion-corrosion of the blades leading to large loss in efficiency. In particular, cavitation had caused deep erosion in localized areas.

 
 

Products:

Belzona® 1111 (Super Metal)

Belzona® 1341 (Supermetalglide)

 

Substrate:

Cast iron

 
 

Application Method:

The application was carried out in accordance with a modified version of Belzona Know-How System Leaflets CEP-1 and CEP-10. The blade edges were rebuilt using plastic formers to accurately restore the required profiles.

 
 

Belzona Facts:

After one year in service, the Belzona System was inspected and was found in excellent condition. Although no accurate measure of efficiency was available, the Belzona System will restore the original efficiency and provide power production through its smooth, hydrophobic surface.

 
 

Photographs Description

  1. Cavitation-erosion damage present on the turbine blades
  2. The blade edges were particularly badly eroded
  3. Blade profiles being restored with Belzona® 1111, using plastic strips to obtain edge detail
  4. Completed application. Note the smooth surface obtained with Belzona® 1341
 
 
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For more information about Belzona visit: www.belzona.com