Nylon-6,6 exhibits chemical, thermal and mechanical properties which include resistance to chemical attack, electrical insulating properties and degradation resistance. As a possible container, it can be used to manufacture a new family of active hybrid materials, coatings and corrosion inhibitor-containing systems. The release of encapsulated corrosion inhibitors is triggered by the corrosion process itself, which prevents the spontaneous leakage of such inhibitor and provides a quick response to changes in the service environment. With this in mind, nylon-6,6 pellets were activated using either γ-irradiation or chemical attack in alkaline solution. Better pore formation was achieved employing the latter method, with such pores being filled with adsorbed ferric nitrates. Electrochemical tests were undertaken to demonstrate the performance of the "smart" nature of the corrosion inhibitor system formed.

Recently research is focused on natural organic compounds as metallic corrosion inhibitors demonstrating good corrosion protection and efficiencies. Steel corrosion behavior in acid media was evaluated in the presence of a pure natural flavonoid metabolite named Chrysin present in different plants. The evaluation of corrosion protection was studied using polarization curves, electrochemical impedance spectroscopy (EIS) and electrochemical current density under potentiostatic conditions. Polarization curves present active dissolution and at high overpotentials two passivation regions were found. Slight corrosion protection was obtained from EIS measurements and potentiostatic curves at three different anodic potentials: -370, +216 and +600 mV, revealed a more stable passive film in the presence of Chrysin at both passive regions. High corrosion protection was obtained on the film formed at +600 mV during the first 4 hours of immersion.