Preparation of polyaniline-modified praseodymium nanofibers as a novel eco-friendly corrosion inhibitor to protect AZ31 magnesium alloy

PURPOSE: The purpose of this study was to evaluate the possibility of using conductive polymers such as polyaniline (PANI) as corrosion inhibitors for metals. DESIGN/METHODOLOGY/APPROACH: In this study, the effect of the addition of praseodymium (Pr 31) cations on the corrosion inhibition performance of PANI for AZ31 magnesium alloy was appraised through electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization tests. FINDINGS: The results of EIS and potentiodynamic polarization tests indicated the improvement of corrosion resistance of AZ31 during different immersion times. RESEARCH LIMITATIONS/IMPLICATIONS: This anti-corrosion ability of PANI/Pr31 composite applies as non-toxic environmentally friendly corrosion inhibitor on the self-healing corrosion protection properties. PRACTICAL IMPLICATIONS: The conductive polymers are interested for many industries. The reported data can be used by the formulators working in the R&D departments. SOCIAL IMPLICATIONS: The anti-corrosion ability of PANI/Pr31 composite present a novel and high effective route against metal corrosion besides application of toxic corrosion. ORIGINALITY/VALUE: The application of titanium dioxide coating in the field of architectural heritage is a great challenge. Therefore, the main objective of this study is to study the synthesis, characterization and corrosion inhibition performance of Pr 31 cations doped PANI nano-fibers as an anti-corrosion additive for AZ31 magnesium alloy in 3.5 Wt.% NaCl solution.