The protection against corrosion of iron is of utmost importance when it comes to preserving sculptures located in outdoor or indoors environments. The corrosion of iron implies not only an aesthetic deterioration of the original surface, but also an invaluable loss of history. Its restorer common practice; use inhibitors for protection of metals, which are applied directly in the metal and subsequently coated with temporary protection. Much work has been done with synthetic inhibitors, but some of them have high ecological impact and toxic. Research focus to evaluated nicotine and caffeine as green iron corrosion inhibitors for apply in artifact's preservation by electrochemical techniques; Polarization Resistance (LPR), Electrochemical Impedance Spectroscopy(EIS) and Electrochemical Noise (EN). Results showed that the best inhibited effect was nicotine presents a combined adsorption process of chemisorption and physisorption. Both caffeine and nicotine added as corrosion inhibitors showed an improvement corrosion protection