Metals and alloys are pre-eminent and important materials for the construction and fabrications of material. The destruction of metals is a usual and unavoidable process but my opting suitable measures it is controllable. Corrosion is impossible to eliminate but on implementing certain remedies we can control to some extent. Usage of the inhibitors for corrosion is one of the controlling measures used widely. Many corrosion inhibitors are banned due to their environmental hazards and toxicity they create. It leads to making use of naturally occurring extracts of plant materials. Natural corrosion inhibitors are nontoxic and environmentally friendly. This review article provides a detailed account of natural products as corrosion inhibitors in various corrosive media which are making use for the last few decades.