The technology is growing very fast in the world with the expansion of novel functional materials. These novel materials are the backbone for technology development. Whereas the lifetime of materials is decreased due to environmental aspects such as the breakdown of a chemical bond with the oxidation process. Usually, it may be called corrosion. In this chapter, we reviewed some corrosion aspects like corrosion types and causes of corrosion. In addition, it also discusses protective materials like conductive polymer and its composites, such as conducting polymers mixers of magnetic materials and graphene additives.