A study was carried out to experimentally investigate the effect of amine-base inhibitors AR-505 and N-211 on the corrosion of 1018 carbon steel in sea water solution at pH 8.2 and 55°C. The experimental apparatus was a circulating flow loop system inside an autoclave. The speed of the impeller was 1000 rpm. The corrosion rate was determined using weight loss method and electrochemical methods such potentiodynamic sweep and linear polarization resistance methods. The experimental results indicate that the N-211 inhibitor has significantly reduced the corrosion rate of 1018 steel more than that of AR-505 inhibitor.