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Article
Preparation and Characterization of PAni Films by Electrochemical Polymerization

Author: Raid A.W. Ismail
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2014 Volume: 10 Issue: 2 Pages: 23-26
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

In this paper, a thin film of H2SO4 doped polyaniline (PAni) has been electrochemically polymerized on conducting indium tin oxide (ITO) substrate. Electrochemical synthesis was carried out by potentiostatic method at 0.7V. The structural and chemical characteristics of the prepared film were investigated by using x-ray photoelectron spectroscopy (XPS), scanning electron microscopy SEM, energy dispersive spectroscopy EDS, and Fourier transformation infrared spectroscopy FT-IR. The direct optical band gap of PAni was estimated from the optical properties and found to be 2.6 eV. The optical properties confirmed that the synthesized film has two broad absorption bands. The surface conductivity measurement was conducted with a four point probe.


Article
Corrosion Protection of Carbon Steel by Zn/PPY mCoating as Layers in 3.5% NaCl

Authors: S.I. Salih --- A.H. Ataiwi --- G.A. Mahdi
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 8 Part (A) Engineering Pages: 821-830
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Plate from low carbon steel was took from oil pipelines, and coated with two layers, the first layer was done by sherardizing process at 400oC for variable periods (15, 30, 60, 120, 240)min, the second layer was applied by polypyrrole (PPY). The results showed that the thickness of sherardizing layer paint is increased when increasing treatment time (15, 30, 60, 120, 240 min). The corrosion performance was evaluated by using polarization method. In addition, it was examined morphological surface of paint layers by using scanning electron microscope (SEM). The results showed that the presence of polypyrrole layer with sherardized coatings, showned significantly increase in corrosion resistance, and coating of low carbon steel by using polypyrrole the conductive polymer with sherardizing process, drastically reduced from the corrosion current density values, as well as the corrosion rate of low carbon steel. The corrosion rate of the the polymer conductive coatings (PPY) on low carbon steel without sherardizing coating (as received) is 19.5 mpy while incorporation of PPY and sherardizing gives corrosion rate of 0.00371 mpy.

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