Inhibition of Cor-Ten steel corrosion by “green” extracts of Brassica campestris
- Autori: M. P. Casaletto, V. Figà, A. Privitera, M. Bruno, A. Napolitano, S. Piacente
- Anno di pubblicazione: 2018
- Tipologia: Articolo in rivista (Articolo in rivista)
- Parole Chiave: Weathering steel; Cor-Ten; 'Green' corrosion inhibitors; Brassica campestris; Marine corrosion; Acidic corrosion
- OA Link: http://hdl.handle.net/10447/300642
Abstract
Extract of Brassica campestris was tested as potential corrosion inhibitor for Cor-Ten steel in NaCl and acidic solutions, simulating a marine and an urban-industrial environment, respectively. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were performed both in absence and in presence of the extract at room temperature. The surface chemical analysis was investigated by X-ray Photoemission Spectroscopy (XPS), before and after corrosion. Electrochemical results demonstrated that a very small concentration of Brassica campestris extracts can inhibit Cor-Ten corrosion in NaCl solution (inhibition efficiency of 80-84%) better than in acidic solutions. Surface analysis results confirmed these good results.