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Belzona® Protects Water Treatment Plant Filter



Water / Wastewater (WATR)



Wall Problem Areas (WPA)


Customer Location:

Water treatment plant, Girona, Spain


Application Date:

May 2008


Application Situation:

Filter for removing organic matter.



Severe corrosion of the stainless steel substrate due to the presence of Hydrogen Sulphide and Sulphuric acid. These are created by bacterial action in the organic matter.



Belzona® 1121 (Super XL Metal)

Belzona® 4311 (Magma CR1)



Stainless steel.


Application Method:

Application was carried out in accordance with Belzona Know-How System Leaflet TCC-5. After grit blasting, deeply corroded areas were rebuilt  using Belzona® 1121 followed by coating with two layers (grey and red) of Belzona® 4311.


Belzona Facts:

The filter was rapidly repaired and put back into service. The Belzona® 4311 provides excellent corrosion protection to all concentrations of Sulphuric acid ensuring long term protection of the equipment.


Photographs Description

  1. Initial state of the sieve
  2. Rebuilding with Belzona® 1121 
  3. Application of the second coating of Belzona® 4311 
  4. Finished unit


Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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