Analysis of Corrosion Attack on Kaplan Turbine Blades

Jakub Horník; Petr Zuna; Michal Zoubek; Marie Svobodová; Tomáš Chmela

doi:10.4028/www.scientific.net/SSP.270.149

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Analysis of Corrosion Attack on Kaplan Turbine Blades

Abstract:

The problematic of pitting corrosion on blades of Kaplan turbine is discussed. Corrosion behaviour was observed during the first year of service. Material of the water turbine blades is martensitic stainless steel GX4CrNi13-4. Chemical composition and hardness of blades was measured, EDS analysis of corrosion products and microstructural evaluation on replicas were carried out. The main problem was found in heterogeneities in the cast microstructure and local disproportions in chemical composition. Influence of microbiologically induced corrosion and surface roughness is considered.

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Periodical:

Solid State Phenomena (Volume 270)

Pages:

149-155

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.270.149

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Online since:

November 2017

Authors:

Jakub Horník*, Petr Zuna, Michal Zoubek, Marie Svobodová, Tomáš Chmela

Keywords:

Chemical Composition, Corrosion, Kaplan Turbine, Microstructure

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References

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