Hydro Power Kaplan Turbine Case Coated With Belzona

Industry:

Fluid Flow (FLOW)

Application:

Centrifugal Pumps (CEP)

Customer Location:

Austria

Application Date:

November 2020

Application Situation:

Kaplan Turbine was badly damaged by cavitation and wear over several decades.

Problem:

The impeller shell of the Kaplan turbine at a Hydro power plant was badly damaged by cavitation and wear over several decades.

Products:

Belzona 1311 (Ceramic R-Metal)

Belzona 1321 (Ceramic S-Metal)

Substrate:

Steel

Application Method:

Blasted to 90µm roughness according to Testex with abrasive Asilikos 0.2-1.4 (carried out by Bauschutz) Residual moisture burned out of the casting Flaws slightly raised and rebuilt with Belzona 1311 - curing: 18 hours at 15 ° C Reconstructed areas ground to the target contour Swept jacket - Belzona 1311 spots were slightly roughened and bare steel surfaces were derusted Coating of the jacket with two layers of Belzona 1321 - the first layer was completely covered within 2 hours - total target layer thickness: 600 µm Applications carried out in line with Belzona system leaflet CEP-5

Belzona Facts:

No specialist equipment was required and a fast return to service.

Photographs Description

Image 1: The turbine casing after sandblasting.

Image 2: Before the reconstruction, a template of the target shape was made.

Image 3: Belzona 1311 applied to rebuild the profile.

Image 4: Complete with a top layer of Belzona 1321