KHIA headerKnow-How in Action

VOL X, NO 17

Belzona® Repair To Diaphragms In Steam Turbine



Power (POWR)



Centrifugal Pumps (CEP)


Customer Location:

Power Plant in Indianapolis


Application Date:

February 1995


Application Situation:

Diaphragms in steam turbine



Severe erosion/ corrosion of the turbine diaphragms in the the latter stages of the low pressure side of the steam turbine. This had been caused by many years exposure to saturated steam and had resulted in a decrease in efficiency in the turbine.



Belzona® 1311(Ceramic R-Metal)

Belzona® 1391



Cast Iron


Application Method:

Modified versions of Belzona Know-How Leaflets CEP-5 and CEP-3. Belzona® 1311 was used to rebuild the damaged areas. Sites rebuilt were then treated with two coats of Belzona® 1391.


Belzona Facts:

Welding was considered as an alternative method of repair. Downtime would have increased from three days, utilising Belzona, to three weeks if welding had been chosen.


Photographs Description

  1. Erosion damage on the diaphragm   
  2. Application of Belzona® 1311 to restore profiles   
  3. Application of Belzona® 1391 underway
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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