Peer-Reviewed Journal Details
Mandatory Fields
Redondo, MI;Breslin, CB
2007
April
Corrosion Science
Polypyrrole electrodepo sited on copper from an aqueous phosphate solution: Corrosion protection properties
Published
81 ()
Optional Fields
ELECTROCHEMICAL SYNTHESIS MILD-STEEL COATINGS FILMS PYRROLE ELECTROPOLYMERIZATION OVEROXIDATION NITRATE REDOX SPECTROSCOPY
49
1765
1776
Highly adherent and homogenous polypyrrole films were electrodeposited at copper from a dihydrogen phosphate solution. The polypyrrole films were electrosynthesized in the overoxidized state by cycling the copper electrode from -0.4 to 1.8 V (SCE) in a pyrrole-containing phosphate solution. The growth of the polypyrrole films was facilitated by the initial oxidation of the copper electrode in the phosphate solution to generate a mixed copper phosphate, copper oxide or hydroxide layer. This layer was sufficiently protective to inhibit further dissolution of the copper electrode and sufficiently conductive to enable the electropolymerization of pyrrole at the interface, and the generation of an adherent polypyrrole film. Potentiodynamic polarization measurements, Tafel analyses and open-circuit potential data revealed that the polypyrrole coating effectively protects the copper substrate from corrosion in a chloride solution. However, the corrosion protection properties were reduced with longer immersion times. (c) 2006 Elsevier Ltd. All rights reserved.
OXFORD
0010-938X
10.1016/j.corsci.2006.10.014
Grant Details