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Belzona® Solves Through Wall Corrosion On Sludge Buffer Tank



Water / Wastewater (WATR)



Tanks and Chemical Containment Areas (TCC)


Customer Location:

Sewage treatment site, UK


Application Date:

September 2013


Application Situation:

Sludge buffer tank fabricated from glass coated mild steel.



The sludge buffer tank was suffering from through wall corrosion at the vapour interface level. The tank could not be taken off line for an extended time which traditional repair methods would require due to demand. Any repairs would have to be carried out without hot works or the use mechanical equipment due to the risk of sparks.



Belzona 1161 (Super UW-Metal)
Belzona 5831 (ST-Barrier)



Glass coated mild steel


Application Method:

The application was carried out in accordance with Belzona Know-How System Leaflet TCC-3. After cleaning the areas, surface preparation by hand abrasion was carried out. Repair plates pre-coated with Belzona 5831 were cold plate bonded over the through wall defects using Belzona 1161. Finally Belzona 5831 was applied to the entire repair areas.


Belzona Facts:

The client had only been able to run the Buffer tank at a reduced capacity of 65%. No other alternatives were deemed to provide a viable solution to the customers requirements. Belzona solution kept the site running with minimal disruption and was carried out without hot works or the use mechanical equipment so presenting no risk of sparks. The job was inspected in 2015 and found to be in perfect condition.


Photographs Description

1, Close up view of through wall defects 2, Plate bonding with Belzona 1161 3, Repairs coated with Belzona 5831 4, Inpsection in 2015

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