KHIA headerKnow-How in Action


Belzona® Withstands Prolonged Wet Abrasion



Pulp & Paper (PLPR)



Centrifugal Pumps (CEP)


Customer Location:

Paper Mill, Turin, Italy


Application Date:

July 2012


Application Situation:

Sludge immersion pump at a paper mill operating under severe wet abrasion conditions.



Due to severe abrasion and corrosion, the components' lifetime was very short. Pump and its components had to be replaced every 2/3 years.



Belzona 5811 (Immersion Grade)

Belzona 1321 (Ceramic S-Metal)

Belzona 1311 (Ceramic R-Metal)



Carbon Steel


Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflets CEP-3, CEP-4 and CEP-5. Surface preparation was carried out using grit blasting. Pitted and eroded areas were rebuilt with Belzona 1311, the internal surfaces were then coated with Belzona 1321 to protect the pump from erosion-corrosion. Belzona 5811 was then used to protect the external surfaces of the pump.


Belzona Facts:

The Belzona solution successfully withstood wet abrasion and managed to significantly prolong the life of this pump. After 4 years in service, the pump was inspected and found to be in perfect condition, with the Belzona coatings predominantly intact. These 4 years of stress-free operation amounted to significant savings due to the absence of maintenance and downtime. The length of maintenance-free time has now been doubled and instead of scrapping the whole pump, customer only needs to replace the coating.


Photographs Description

  1. Pump impeller being coated
  2. Pump lining applied
  3. External coating applied
  4. Inspection after 4 years in service
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: