Abstract
In this work a novel composite of polyaniline and cadmium telluride was electrochemically synthesized on transparent indium thin oxide plates from an aqueous disulfuric acid solution 0.5 M. The aqueous disulfuric acid solution contained LiClO4 as a supporting electrolyte, aniline 0.01 M as a monomer and CdTe as a semi-conductor doping agent. Extensive experimental characterization results have shown the superior anticorrosion properties of such a material. The authors provide a review of all experimental data. As well, they quantify the above mentioned anticorrosion properties when applied to a mild stainless steel (XC 70). The electrochemical properties of the composites were evaluated by cyclic voltamperometry and electrochemical impedance spectroscopy and confirmed the notably enhanced anticorrosive properties of the synthesized composite material: This improved anti-corrosion performance was correlated to the exhibited large resistance and the greater double layer capacitance compared to those seen in pure PAni coatings. Anticorrosion behavior of the composite Polyaniline/CdTe compared with pure polyaniline coating on mild steel is investigated in a 3.5% NaCl solution of pH 1.73, using the electrochemical impedance spectroscopy (EIS) and polarization curves (Tafel) methods. It was found that the pristine PAni film improved the corrosion protection efficiency of mild steel when it was used as only a film without any additives. However, the composite PAni/CdTe coating was shown to significantly improve the protection of mild steel against corrosion due to the efficient anticorrosive properties of this composite. This result indicates that the use of the novel PAni/CdTe composite is rather a promising approach for protecting mild steel substrate from corrosion and that it may be used in other fields of interest.
Published Version
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