Abstract
Polyaniline–graphene nanocomposite film was electrochemically deposited by cyclic voltammetry on copper electrode. The corrosion resistance of polyaniline–graphene nanocomposite covered copper substrates was estimated using potentiodynamic polarization and electrochemical impedance spectroscopy techniques in 5000 ppm NaCl aqueous solution at room temperature. Potentiodynamic Polarization results show that corrosion potentials shift to anodic regions in the presence of polyaniline–graphene nanocomposite compared to the blank solution. The electrochemical measurements, also, indicated that the inhibition efficiency for polyaniline-graphene nanocomposite is 98%.
1. Introduction
Copper has been one of the important materials in the industry owing to its high electrical and thermal conductivity, mechanical workability, and its relatively noble properties. It is widely used in many applications of electronic industries and communications as a conductor; also, it is used in electrical power lines, pipelines for domestic and industrial water utilities, heat conductors, and heat exchangers. Thus, corrosion of copper and improving the corrosion resistance of this metal in a wide variety of media has attracted the attention of researchers [1–5].
4. Conclusion
Our study focused on the formation of PANI/G nanocomposite coatings as a means of corrosion protection of Cu. PANI/G nanocomposite coatings were successfully electrodeposited on Cu by cyclic voltammetry technique in a sulfuric acid medium and were then characterized by FTIR, UV–vis, XRD, and TGA. The coatings effectiveness against corrosion was tested by potentiodynamic polarization and EIS studies. PANI/G nanocomposite coatings were found to be capable of suggesting a noticeable enhancement of protection against Cu corrosion process carried out in 5000 ppm NaCl and the degradation rate decreased.
