Corrocoat Japan was called in to service a raw water pump at a steel plant that the company had last serviced 7 years previously in 2011. At that point, the vertical wet-pit volute pump had been in operation since 1993 without any servicing or ant-corrosion treatment and all the internal components were found to be completely deteriorated. Corrocoat Japan carried out a full refurbishment programme on the pump including the application of a suitable corrosion protection coating system and the pump was put back into service at the steel plant.
The client was very satisfied with the results and so 7 years later and, as part of the normal maintenance program in the plant, they again called in Corrocoat to carry out more work on the pump and to prepare for another 7 years in service.
Both impeller and casing were then coated with Polyglass VEHA, a modified vinyl ester filled with glass flake. Polyglass VEF provides excellent resistance to solvents, acids and de-mineralised water at elevated temperatures and provides excellent undercutting resistance and sliding abrasion resistance. The external surface of the pump was coated with Plasmet ZF a surface tolerant coating to provide good corrosion protection.
The pump was re-assembled and prepared for shipment back to the steelworks for another testing 7-year stint, fully protected by Corrocoat Japan’s advanced corrosion protection coatings systems.