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Theoretical and experimental studies of a new aniline derivative corrosion inhibitor for mild steel in acid medium |
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| Authors: | Caio Machado Fernandes Marcos Vinícius Palmeira de Mello Nazir Escarpini dos Santos Alessandra Mendonça Teles de Souza Mauricio Lanznaster Eduardo Ariel Ponzio |
| Affiliation: | 1. Instituto de Química, Campus do Valonguinho, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil;2. Instituto de Química, Campus do Valonguinho, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
Faculdade de Farmácia, Laboratório de Modelagem Molecular & QSAR (ModMolQSAR), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil;3. Faculdade de Farmácia, Laboratório de Modelagem Molecular & QSAR (ModMolQSAR), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil |
| Abstract: | 4-Chloro-N-(pyridin-2-ylmethyl)aniline (CPYA) was synthesized by a simple and inexpensive method and tested as a corrosion inhibitor in acid medium for mild steel by using gravimetric studies and electrochemical measurements. An average maximum efficiency of 96.0% was achieved at 4.59 mmol/L. Corrosion kinetic and thermodynamic parameters were also analyzed. Surface analyses (atomic force microscopy and scanning electron microscopy) show that protection is enabled by adsorption on the metal, forming a film. Quantum chemical calculations were performed to access information regarding the molecular structure in the corrosive medium and to support interpretation of the results obtained by experimental methods. |
| Keywords: | acid medium aniline derivative corrosion inhibitor electrochemical measurements quantum chemical calculation surface analyses |