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Belzona® Protected Submersible Sludge Pump Six Years On



Pulp & Paper (PLPR)



Centrifugal Pumps (CEP)


Customer Location:

Paper Mill, Italy


Application Date:

June 2016


Application Situation:

Casing and components of a submersible sludge pump.



Previously the pump only lasted two years in service before requiring major overhaul. Originally coated in 2010 with Belzona, after six years of uninterrupted service, the customer opened the pump for mechanical maintenance. Belzona coating was found to be in excellent condition but it was decided to refresh the Belzona protection to prepare the pump for more years of service in sludge.



Belzona 1311 (Ceramic R-Metal)

Belzona 1321 (Ceramic S-Metal)

Belzona 5811 (Immersion Grade)



Cast Iron


Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflets CEP-1, CEP-3 and CEP-4. The coating applied in 2010 was roughened and the new coating was applied on top.


Belzona Facts:

Throughout its six-year service life, the pump faced zero downtime due to Belzona erosion-corrosion protection.


Photographs Description

  1. Internals after six years in service
  2. Casing after six years in service
  3. Impeller recoated in 2016
  4. Casing and internals recoated in 2016
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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