Geographic Information Systems (GISs) has been used for the register and management of geographic data, as well as for monitoring and analysis of environmental parameters. Hence, it is possible to employ GIS, based on spatial and statistical analysis, for the study of corrosion and its effect on systems such as electric power national system. In this work it is shown how, from discrete sampling of the different corrosive agents in strategic sites, it is possible to obtain trends for the spatial behavior of those variables, to finally generate maps which allow making assessments about life-in-service of materials in different zones of the country.