HVOF-gespritzte Schichten in Wasserkraftanlagen; Herstellung, Prüfung und Erfahrungen (HVOF-Sprayed Coatings for Hydroelectrics: Process, Testing And Experiences)

In the present project, the widest possible variety of coats applied by means of high-speed flame spraying are investigated with regard to their applicability to components of hydroelectric power stations. The investigations concentrate on protective coats for the wear surfaces of turbine wheels and various guide vanes. The structural shapes and specific features of different turbine wheels, forms of wear phenomena and their causes as well as experience with different materials and coatings are described. The resulting planning and stipulation of suitable testing conditions for the targeted investigations with high-speed flame- sprayed coats are also described. Paper text in German.