Substantial enhancement in the anticorrosivity of AA6061 by Doxycycline hydrochloride drug

• Main Authors: Mudigere Krishnegowda Pavithra, Thimmappa Venkatarangaiah Venkatesha, Mudigere Krishnegowda Punith Kumar, Nanjanagudu Subba Rao Anantha
• Format: Article
• Language: English
• Published: International Association of Physical Chemists (IAPC) 2015-08-01
• Series: Journal of Electrochemical Science and Engineering
• Subjects: corrosion inhibitor; aluminium alloy; potentiodynamic polarization; electrochemical impedance spectroscopy; adsorption isotherm.
• Online Access: http://pub.iapchem.org/ojs/index.php/JESE/article/view/181

The significant anticorrosive property of the antibiotic drug doxycycline hydrochloride (DCH) was investigated by electrochemical techniques such as potentiodynamic polarization, electrochemical impedance and chronoamperometric techniques. DCH inhibited the pitting corrosion of aluminium alloy 6061 (AA6061) in 3.5% NaCl media with 90% efficiency. The adsorption of DCH on AA6061 conform Langmuir isotherm by means of physisorption.  Quantum chemical calculations were evaluated to ascertain the active sites of DCH molecule responsible for adsorption and to support the experimental findings.