The work presents the results of the investigations of the effect of inhibitors coated on the internal walls of a ceramic mould on the quality of the obtained casts made of the AM60 alloy containing additions of chromium and vanadium. In order to reduce the reactivity of magnesium alloy cast by the technology of investment casting with the material of the mould and the ambient atmosphere, solid inhibitors were applied in the form of a mixture of KBF4 and H3BO3 after the stage of mould baking and before the mould’s being filled with the liquid alloy. For the purpose of examining the effect of the inhibitors on the surface quality of the obtained casts, profilometric tests were performed and the basic parameters describing the surface roughness, Ra, Rz and Rm, were determined.
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 Herrero-Dorca, N., Sarriegi Etxeberria, H., Hurtado, I., Andres U., Rodriguez, P. & Arruebarrena, G. (2011). Analysis of Different Inhibitors for Magnesium Investment Casting. Materials Science and Engineering. 27, 1-7.
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 Jafari, H., Idris, M.H. & Ourdjini, A. (2014). An alternative approach in ceramic shell investment casting of AZ91D magnesium alloy: In situ melting technique. Journal of Materials Procesing Technology. 214, 988-997.
 Rapiejko, C., Pisarek, B. & Pacyniak, T. (2014). Effect of Cr and V Alloy Additions on the Microstructure and Mechanical Properties of AM60 Magnesium Alloy. Archives of Metallurgy and Materials. 59(2), 771-775.
 Rapiejko, C., Pisarek, B. & Pacyniak, T. (2014). Analysis of AM60 and AZ91 Alloy Crystallisation in Ceramic Moulds by Thermal Derivative Analysis (TDA). Archives of Metallurgy and Materials. 59(4), 1449-1455.
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