Electrodeposition and Corrosive Properties of Environmental ZnFe/Polyaniline on Low Carbon Steel
İ.H. Karahan and F. Tiltil
Mustafa Kemal University, Faculty of Art and Science, Department of Physics, 31040 Hatay, Turkey
Full Text PDF
Zinc-iron alloy plating (ZnFe) was successfully deposited on AISI 4140 steel applying cyclic voltammetry technique. Polyaniline (PANI) film was synthesized with cyclic voltammetry technique from 0.10 M aniline containing 0.30 M oxalic acid solution on zinc-iron plated carbon steel (AISI4140/ZnFe) electrode. ZnFe film was characterized by scanning electron microscopy and X-ray diffraction technique. The corrosion behaviour of zinc-iron deposited carbon steel electrodes with and without PANI film in 3.5% NaCl solution was investigated with polarization curves. Effect of pH and current density on the synthesis of the aniline was also examined. The results showed that PANI coating led to decrease of the permeability of metallic plating. The PANI homopolymer film provided an effective barrier property on zinc-iron coating and a remarkable anodic protection to substrate. ZnFe particles had more homogeneous, smooth prismatic structure. It is suggested that ZnFe/PANI deposits produced in the bath applying 0.1 mA/cm2 current density probably offer bigger protection to the steel substrate.

DOI: 10.12693/APhysPolA.130.282
PACS numbers: 81.05.Bx, 82.35.Gh, 81.65.Kn