Belzona Repairs and Protects Draft Tube

KHIA ID: 8707
Industry: Fluid Flow (FLOW)
Application: ()
Substrate: Carbon steel
Customer Location: Hydroelectric Power Plant, Turkey
Application Date: September 2021

Belzona 9111 (Cleaner Degreaser)

Belzona 1311 (Ceramic R-Metal)

Belzona 1321 (Ceramic S-Metal)

Problem: Corrosion and cavitation on the draft tube caused by pressure fluctuations. 
Photograph Descriptions

1.) Surface loss caused by corrosion and cavitation

2.) After mechanical cleaning

3.) Preparation for the application of the second layer of Belzona 1321

4.) Coated with Belzona 1321 in two layers

Application Situation
Rebuild and repair of a draft tube used as part of a Hydroelectric process. 
Application Method
This application was carried out in accordance with a modified version of system leaflet VPF-01. After the surface preparation, Belzona 1311 was used to resurface the profile. Once the damaged areas had been repaired, the 40 cm inner part of the draft tube where cavitation was intense, was coated with Belzona 1321 in order to provide cavitation and erosion resistance.
Belzona Facts
Belzona was able to rebuild and protect the draft tube with a quick and easy solution. Therefore, the customer was very satisfied.