Tomato extract as sustainable corrosion inhibitor for 316 stainless steel

Corrosion is an economic problem worldwide, it can damage the materials which are used to construct automobiles, pipeline, systems, bridges and buildings, petroleum refineries, etc. Corrosion inhibitors are used as effective alternatives for the protection of metallic surfaces against their dissolution. Most of them are synthetic, they are not naturally produced, and generate hazardous effects for the environment[1]. Plant extracts have been recently studied as corrosion inhibitors for different metals in various environments. The aim of this relation is to investigate tomato extract as a cheap, raw, green and non-toxic anti-corrosion additive for 316 stainless steel (SS) corrosion in a 3.5% NaCl solution. The formation of protective layer on the surface of metal are to be confirmed by OM and SEM. The corrosion inhibition of 316 SS have been studied by Electrochemical Impedance Spectroscopy (EIS), Potentiodynamic polarization (PDP) and Ciclic Polarization techniques with the use of Gamry Software.

Studio dell'efficacia e caratterizzazione superficiale di un inibitore naturale, in questo caso estratto di pomodoro, su l'acciaio inossidabile 316SS. Sono state inoltre effettuate misure potenziometriche relative alla resistenza alla corrosione del piano di inibitore che si è formato sulla superficie dell'acciaio.