A Bis(di‐n‐butyltin)–Quinone Derivative as a Simultaneous Chemo‐ and Bioactive Corrosion Inhibitor

Abstract

AbstractThe bis(di‐n‐butyltin) derivative of 2,5‐bis(2‐hydroxyethylamino)‐1,4‐benzoquinone was synthesized and characterized by common spectroscopic techniques. In solution, discrete molecules with pentacoordinate tin atoms were observed, whereas the X‐ray diffraction analysis of the solid‐state structure revealed polymeric chains that were due to intermolecular Sn···O bonds. In vitro tests demonstrated that the tin compound displays bactericidal activity against a wide range of aerobic and anaerobic bacteria. Acute toxicity tests indicated that the di‐n‐butyltin compound has a relatively low toxicity level. The corrosion inhibition efficiency of the ligand and the tin compound were evaluated by polarization scans of mild steel samples that had been exposed to a sour brine environment. The tin–quinone compound showed good inhibition efficiency (about 75 %) at relatively low concentrations (25–50 ppm) and at different testing times (0.25–20 h).(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)