Original scientific paper
https://doi.org/10.5599/jese.185
Outstanding inhibitive effect of colchicine on aluminium alloy 6061 corrosion
Mudigere Krishnegowda Pavithra
; Department of Chemistry, Kuvempu University, Shankaraghatta-577451, Shimoga, Karnataka, India
Thimmappa Venkatarangaiah Venkatesha
; Department of Chemistry, Kuvempu University, Shankaraghatta-577451, Shimoga, Karnataka, India
Mudigere Krishnegowda Punith Kumar
; Department of Materials Engineering, Indian Institute of Science, Bangalore-560012, Karnataka, India
Nanjanagudu Subba Rao Anantha
; Department of Chemistry, Kuvempu University, Shankaraghatta-577451, Shimoga, Karnataka, India
Abstract
The corrosion protection ability of colchicine (CC) on Aluminium alloy 6061 (AA6061) in 3.5% NaCl medium was examined by potentiodynamic polarization, electrochemical impedance, and chronoamperometric techniques. About 99 % of protection efficiency was achieved by 2 mM concentration of CC in 3.5% NaCl solution.The adsorption of CC on AA6061 surface obeys Langmuir isotherm by following both physisorption and chemisorption mechanism. Variation in the surface morphology of inhibited and uninhibited metal samples was examined by scanning electron microscopy.
Keywords
Corrosion inhibitor; Aluminium alloy; Potentiodynamic polarization; Electrochemical impedance spectroscopy, Adsorption isotherm
Hrčak ID:
149442
URI
Publication date:
26.9.2015.
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