Abstract
The corrosion behavior of aluminum alloys in mortar has been studied by electrochemical measurements. In mortar without NaCl, the corrosion rate calculated from the weight loss agreed fairly well with the limiting diffusion current of oxygen, and also with the passivation current. The corrosion mechanism changed from the hydrogen evolution type to the oxygen reduction type with immersion time, which brought the reduction in corrosion rate. On the other hand, the addition of 3%NaCl in mortar made the corrosion of hydrogen evolution type to continue.
