BELZONA RESCUES A 100-YEAR OLD PENSTOCK
Industry: Power (POWR)
Application: VPF-Valves, Pipes and Fittings (VPF)
Substrate: Carbon steel
Customer Location: Hydropower, Northeastern USA
Application Date: 2007
Products:
Belzona 1121 (Super XL-Metal)
Belzona 5811 (Immersion Grade)
Problem: 100 plus year old steelwork was corroding from moisture. The problem was detected when installing new control valves and trash racks on penstocks.
Photograph Descriptions
- Penstock embedded in concrete thrust block at base of the dam
- Pinholes discovered during the work
- Surface prepared by blasting
- Completed application
Application Situation
Steelwork of 10 foot diameter penstocks in a Hydropower plant.
Application Method
The surface was properly prepared by abrasive blasting. First, the pits and holes were repaired with Belzona 1121 and then overcoated with Belzona 5811.
Belzona Facts
The plant was originally built in 1908 and the original steelwork showed significant exterior corrosion, thus operators feared that it would soon have pinholes. The plant was shut down for control upgrades so operators chose Belzona because of its reputation in similar situations.
