The corrosion behaviour of AZ91 alloy was investigated in 0.1M hydrochloric acid solution at different temperatures 20-‎‎50○C. The study was done by weight loss technique and electrochemical method, using Tafel polarization technique. Additive ‎concentration increases the inhibition effectiveness. The results show that the protection efficiency P% followed the sequence ‎ethylenediamine (EDA) > diethylamine (DEA) > ethylamine (EA). The influence of temperature on the corrosion behaviour of ‎AZ91 alloy in 0.1M HCl solution was studied between 20○C and 50○C both with and without inhibitors. The inhibition ‎efficiencies obtained from the two employed methods (weight loss technique and potentiodynamic polarization technique) are ‎nearly closed. From the obtained data, it was found that the inhibition efficiency increases with increasing the inhibitor ‎concentration until the optimum one. Adsorption of the inhibitors on AZ91 alloy surface was found to obey Langmuir's ‎adsorption isotherm. SEM examination of AZ91 alloy surface revealed that these inhibitors prevented AZ91 from corrosion by ‎adsorption on its surface to form a protective film, which acts as barrier to aggressive agents.‎