The paper presents aspects regarding the corrosive action of salty drilling fluids in contact with the metallic surfaces of the drilling equipment. Drilling fluids are characterized from the rheological point of view. In addition, other standard properties are determined, such as density, filtrate volume and cake thickness. All these properties help to establish the stability degree of the dispersed system water - clay. In static regime, the corrosive processes are evaluated using the gravimetric method, at temperatures of 25°C and 80°C and NaCl concentrations of 15% and 30% respectively. Based on the experimental results, the intensity of the corrosive process, due to temperature and salt content from the drilling mud, is correlated with the main characteristics of these fluids.