No abstract

U radu su prezentirani rezultati istraživanja korišćenja domaćeg zeolita sa ležišta "Igroš" za izradu keramičkih uzoraka i primenu u uslovima dejstva kavitacije. Za ispitivanja su korišćeni uzorci talka sa 15% zeolita iz domaćeg ležišta IGROŠ (Brus) sinterovani na 1200ºC. Za određivanje otpornosti na dejstvo kavitacije korišćena je ultrazvučna vibraciona metoda sa stacionarnim uzorkom. Gubitak mase i nivo degradacije površine uzoraka praćeni su primenom analize slike i Jungovog modula elastičnosti. Rezultati ispitivanja pokazali su dobru otpornost keramike na dejstvo kavitacije na bazi talka i zeolita što ukazuje na mogućnost primene u različitim oblastima industrije gde se očekuje prisustvo razaranja pod dejstvom kavitacije.

The paper present the results of the synthesis of a new refractory coating based on basalt for the protection of metal construction under conditions of cavitation. Initial basalt samples obtained from the locality Vrelo - Kopaonik. The basalt based refractory filler was obtained by crushing and grinding selected samples of basalt rock. XRD, SEM and optical microscopy methods were used to characterize the obtained filler samples. The research defined the composition of basalt -based coating with epoxy resinbased binder, organic additives and organic solvent. The resistance properties of protective coatings applied to metal surface were investigated using the ultrasonic vibration method with a stationary sample according to the ASTM G 32 standard. To evaluate the resistance of the sample surface to the action of cavitation, the sample surface was examined before and during testing. The surface of the samples was monitored by scanning electron microscopy in order to analyze the morphology of surface damage. Computer image analysis according to the Image Pro Plus program was applied to assess the damage to the sample surface. The obtained test results showed high resistance of the coating layers to the effect of cavitation, with small mass losses, small damage to the coating surface and a cavitation rate of 0,1 mg/min.