Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 249, Issue -, Pages 930-940Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2017.11.129
Keywords
Copper; Acid corrosion; Phosphatidylcholine; Potentiodynamic polarisation; Electrochemical impedance spectroscopy
Funding
- Department of Science and Technology (DST), Govt. of India [SR/FT/CS-110/2010, SB/FT/CS-003/2012, GAP-183112]
- DST, New Delhi, India
- DST-FIST [SR/FST/CSI-267/2015]
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Electrochemical reactions occurring at the copper-aqueous hydrochloric acid interface and efficacy of phosphatidylcholine coating towards retarding the rate of these reactions are been assessed through potentiodynamic polarization and electrochemical impedance spectroscopic methods. Phosphatidylcholine coating retards the rate of both cathodic and anodic reactions at the metal-electrolyte interface and maintains high degree of corrosion inhibition efficiency for copper in hydrochloric acid with 0.5 M to 2 M concentration up to 96 h of exposure time. Mode of adsorption of phosphatidylcholine molecule on copper surface in acid medium is explained from FTIR spectroscopic data and corroborated with quantum chemical results. (C) 2017 Elsevier B.V. All rights reserved.
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