The study of corrosion is of paramount importance because of the direct and indirect losses caused by this problem. It is a phenomenon that causes the degradation of a material and its alteration due to a physical-chemical or biological interaction with its environment. It affects metallic materials used in many industrial fields such as the automotive. This work proposes to identify the types of materials most commonly in the automotive manufacturing, their characteristics and the standards associated with their uses. These materials must be aesthetic, dynamic, lightweight and durable. Currently, three materials are mainly used in the automotive industry: Steel, polymers, and aluminum based alloys. Our choice of material was based on steel, for reasons related to its low of production cost, its superior strength properties than other materials and its high rate of use in the car. We used the multi-criteria methods, in this case the ELECTRE1 method most frequently used in problems of aid to the multi-criteria decision. Among the five steels constituting the vehicle body, this method allowed us to identify the steel most affected by corrosion.