Study on the impact wear and cavitation erosion behavior of hydraulic turbine coatings

April 1, 2026Journal of Hydraulic Engineering

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This research aims to clarify the independent damage mechanisms of hydraulic turbine protective coatings in abrasive water flow.
Conducted rotating jet wear tests in slurry medium and ultrasonic cavitation tests in clean water.
Tested three thermal spraying coatings on 0Cr13Ni5Mo stainless steel substrate.
Established models for impact wear and cavitation erosion based on weight loss comparisons.
All coatings showed excellent resistance to sand impact wear with normalized weight loss of only 3% to 4% compared to the substrate.
In cavitation conditions, HVOF-WC10Co4Cr exhibited the poorest cavitation resistance with a normalized weight loss 1.58 times that of the substrate.
HVAF-WC10Co4Cr coating demonstrated superior cavitation resistance due to its lowest porosity.

Investigates wear behavior of hydraulic turbine coatings in abrasive water environments, suggesting optimal selections.

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WU et al. (2026) studied this question.

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