KHIA headerKnow-How in Action


Belzona® Protects Waste Water Tank



Pulp & Paper (PLPR)



Tanks and Chemical Containment Areas (TCC)


Customer Location:

Pulp Factory, Southern Germany


Application Date:

June to December 2007


Application Situation:

10,600 cubic metre waste water tank with inner surface of 3000m² containing waste water from pulp production.



Tar epoxy coating had failed especially in vapour phase due to limited chemical resistance against Sulfite solutions. Corrosion had led to more than 1000 holes in roof and leaks in side walls.



Belzona® 1121 (Super XL-Metal)

Belzona® 5811 (Immersion Grade)



Carbon Steel


Application Method:

Failed coating was removed by ultra-high pressure water jetting and grit blasting. Steel plates were welded in tank to guarantee mechanical integrity. Rebuilding of pitted steelwork carried out in accordance with Belzona Know-How System Leaflet TCC-5. Coating by heated airless spray in 2 layers.


Belzona Facts:

Resistance of Belzona products had been proven over three years, through leak repairs carried out to keep tank in production. Cost saving as compared to new tank: app. 4.5 million EUR.


Photographs Description

  1. 10600cbm tank 
  2. Welded steel plates during crack testing 
  3. Rebuilding of pitted surface with Belzona® 1121 
  4. Hot sprayed surfaces with Belzona® 5811 before scaffold was taken out
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


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