Belzona 1331 rebuilds Turbine Cover in the Hydro Power Industry

KHIA ID: 8543
Industry: Power (POWR)
Application: VPF-Valves, Pipes and Fittings (VPF)
Substrate: Steel
Customer Location: Austria
Application Date: March 2021
Products:

Belzona 1331

Problem: The turbine cover became oval due to welding work on the outer circumference. The fits on the inside diameter also warped. Since these surfaces already had their finished diameter, they should be built up with Belzona and then machined to the finished size.
Photograph Descriptions

Image 1: Turbine Cover

Image 2: Identifying the issues 1: Worn ring (traces of erosion from the water) 2: Mating surfaces were coated in 3 layers 3: The undercut was coated in a single layer

Image 3: The lid after applying the first coat of Belzona 1331

Image 4: Completed application after being machined.

Application Situation
An International Hydro Power client needed Belzona to rebuild an area of a turbine cover.
Application Method
Blasted to 110 µm roughness according to Testex with blasting agent Sintox 0.2-1.4 and corundum F14 (mixed 2: 1) Cleaned and degreased surfaces Build up the surfaces with the first layer of Belzona 1331 - target layer thickness 1000 µm Build up the mating surfaces with a second layer of Belzona 1331 after approx. 3 hours - target layer thickness 1000 µm Build up the mating surfaces with a third layer of Belzona 1331 after approx. 3 hours - target layer thickness 1000 µm in accordance with Belona System Leaflet VPF_13
Belzona Facts
The client had already used welding as a procedure which had failed and became oval on the outer circumference.
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