FOUR BELZONA REPAIRED CONDENSERS STILL IN SERVICE AFTER 17 YEARS
Industry: Buildings & Structures (BSTR)
Application: CEP-Centrifugal Pumps (CEP)
Substrate: Carbon steel
Customer Location: Power station, Thailand
Application Date: October 1993
Products:
Belzona® 1311 (Ceramic R Metal)
Belzona® 1321 (Ceramic S Metal)
Problem: Corrosion pitting had occurred around the tubes as a result of bi-metallic corrosion effects and the chloride content of the used river water.
Photograph Descriptions
- Corroded tube sheet before application in 1993
- Standard application underway. Special care was taken to prevent contamination of substrate)
- Inspection in 2005
- Inspection in 2010
Application Situation
Four main condensers with a total of eight tube sheets
Application Method
The application was carried out in accordance with the Belzona Know-How System Leaflet HEX-1. Belzona® 1311 was used for rebuilding and Belzona® 1321 for the coating of the tube sheets.
Belzona Facts
Since the application of the coating, regular inspections took place which proved the excellent performance of the Belzona coating. In 2005, the complete coating of the tube sheet was still intact without showing any signs of degradation. A further inspection in 2010, after 17 years in service, also showed that the coating was still in a good condition. Only 10% of the surface was locally damaged due to mechanical damage. These areas were quickly repaired with Belzona before the tube sheet was put back into service.
