Anionic and cationic polyacrylamides (PAM) were added to aq. Cr2O3 suspension at pH 3-9 to det. the amt. of polymer adsorbed, surface charge d. and zeta potential of solid Cr2O3 particles as well as stability of the suspension. The spectrophotometry, potentiometric titration, microelectrophoresis and turbidimetry methods were used for the study. The adsorption of PAM depended significantly on the soln. pH. For anionic PAM, it decreased with the pH rise, whereas it increase for cationic PAM. High adsorption level was a result of more coiled structure of macromols. located in adsorption layer. The cationic PAM had higher impact on the Cr2O3 suspension stability (especially at pH 3 and 6). Its addn. resulted in a considerable deterioration of stability conditions at pH 3 due to the formation of polymer bridges.