This study reports on the systematic assessment of hydrogen (H-2) production by corrosion of aluminum alloy (AA) in hydrochloric acid (HCl) at different temperature. Rare earth inhibitors, lanthanum (La) and cerium (Ce) have been applied to control the H-2 production process. The production process is based on electrochemical reaction of aluminum (anodic reaction) in the HCl solution, which has a high concentration of hydrogen ions (H+), the H+ ions are reduced and H-2 is evolved. Preliminary results showed that an increase in temperature of working solution produced an increase of the H-2 production rate. The H-2 production rate increases because acid can prevent aluminum passivation during H-2 evolution. The rare earth inhibitors La and Ce control the H-2 evolution, especially, when using mixture of both inhibitors. This result demonstrates a synergistic effect between the La and the Ce inhibitors. X-ray diffraction studies were performed on the surface structure before and after immersion, and a scanning electron microscope (SEM) was used to study the morphology of the AA. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.