EFFECTS OF THE APPLICATION OF PYROPHYLITE IN THE COMPOSITION OF PROTECTIVE COATINGS

Abstract

In the paper, samples of protective coatings based on pyrophyllite were examined. The initial sample of pyrophyllite was obtained from the Parsovići deposit, Konjic, Sarajevo, AD Harbi BiH. Pyrophyllite samples were subjected to micronizing grinding to a filler grain size of 20 μm. XRD, SEM and optical microscopy methods were used to characterize the obtained fillers based on pyrophyllite. The optimal composition of protective coatings based on pyrophyllite and the manufacturing process were determined. The resistance of refractory coatings to the effect of cavitation was experimentally determined using the ultrasonic vibration method with a stationary sample according to the ASTM G32 standard. Based on the value of the cavitation rate, the analysis of the formation and development of damage to the surface of the samples, the possibility of applying a protective coating in the conditions of exploitation in which the occurrence of corrosion and cavitation is expected was assessed.