Corrosive process study at a central of water treatment and distribution in Potiretama – CE rural area

The corrosive phenomenon is a process of metallic materials deterioration that occurs due to the medium and metal interaction. As this process is spontaneous, it entails enormous losses for all metallics segments. A theoretical review was developed and, later, in situ visits were carried out that allowed the objects registration in a corrosive process. From the studied parts evaluation, it was possible to observe the corrosion forms, the corrosive medium identification and operational conditions that were subjected and, then, the Corrosion Triangle was constructed, in order to propose techniques to soften the impacts caused by the corrosive phenomenon. The adductor presented numerous corrosion forms, with highest prevalence being uniform corrosion. This uniform corrosion caused complete destruction of several adductor elements, as well as partial destruction of others. Another corrosion found was in concrete, a corrosion that can be fatal to the entire structure. Figure 1 shows the uniform corrosion in a joint part (1a) and corrosion in wall of the reservoir concrete (1b). The reservoir presented cracks and holes caused by iron corrosion inside its structure, and these caused water leakage. For such situations, the best technique would be the joint replacement due to its advanced corrosive process and, in the reservoir case, the precast concrete rings replacement to avoid a total water supply stoppage in the rural area region.