Corrocoat’s Belarusian partner (Corrocoat AKZ) were recently commissioned to complete the refurbishment
and corrosion protection of a case iron condensate pump casing at a power station. The pump had been in
operation for circa 10 years; pumping water at a temperature of 20° – 60°C, with thermal spikes up to 70°C.
On inspection, it was found that the pump casing’s internal surface had suffered from cavitation and erosion
wear. The depth of corrosion pits was in the range of 10-15mm and the whole casing surface needed to be
restored to original condition.

The client required a coating with excellent erosion and cavitation resistance and AKZ proposed the following,
which was accepted. The internal surface of the pump casing was abrasive was cleaned to ISO 8501-1 Sa2
1/2 , after which Corrocoat EA was applied as a filler in the deep pockets of the eroded areas. This was
followed by a top coat of Corrocoat EB at a minimum DFT of 2000μm.

As a result of the refurbishment and relining, the pump casing was restored to the required thickness and the
applied coating system will provide resistance to the effect of cavitation for a long period of time. The client was
extremely pleased with the outcome of the work, and with the savings achieved when compared to the cost of
replacement.