Electrochemical Synthesis and Corrosion Behaviour of Poly(o–anisidine)‐TiO₂ Nanocomposite on ZnNi‐Plated Carbon Steel

Abstract

Electrosynthesis of poly(o‐anisidine) (POA) homopolymer and poly(o‐anisidine)‐TiO2 (POA‐TiO2) nanocomposite were carried out on ZnNi plated carbon steel (CS/ZnNi). The synthesis was achieved cyclic voltammetry technique in 0.2 M sodium oxalate solution containing 0.1 M o‐anisidine and o‐anisidine + 0.2 gL−1 TiO2 nanoparticles for POA and POA‐TiO2, respectively. The POA and POA‐TiO2 nanocomposite were characterized by scanning electron microscopy (SEM), energy dispersion x‐ray analysis (EDX), electrochemical impedance spectroscopy, linear sweep voltammetry, open circuit potential‐time and potentiodynamic polarization techniques. Electrochemical impedance spectroscopy, open circuit potential‐time (Eocp‐t) and potentiodynamic polarization tests were done in 3.5% NaCl solution. Potentiodynamic polarization curves showed that a strong decrease of corrosion current for POA‐TiO2 coated CS/ZnNi (CS/ZnNi/POA‐TiO2) electrode when compared to the POA coated CS/ZnNi (CS/ZnNi/POA) and CS/ZnNi electrodes. Electrochemical impedance spectroscopy results indicated that polarization resistance (Rp) of the CS/ZnNi/POA‐TiO2 electrode was higher than the other electrodes. These results revealed that TiO2 nanoparticles increased the anticorrosive property of the POA film.

Nanoparticle and Schiff Base Compound in Poly(O-Aminobenzyl Alcohol) Coating for Protection of 316L Stainless Steel against Corrosion

“…The main factors affecting the anticorrosion performance of electrodeposited coating include thickness, doping type of film, oxidation type and degree, porosity, roughness and adhesion. Numerous studies have been reported that several nanoparticles such as alumina (Al2O3) [32], titanium dioxide (TiO2) [33], silica (SiO2) [34] and nanopolymer composite [35,36] incorporated into the polymer matrix to improve the electron transfer rate, mechanical properties and corrosion resistance of coatings. Spinel ferrites (MFe2O4) which include the transition metals such as Zn, Co, Mn or Ni ions exhibit richer redox properties than single metallic oxide in electrochemical reactions.…”

Conducting polymer‐based electrochemical biosensor for the detection of acetylthiocholine and pesticide via acetylcholinesterase

“…Batteries, artificial muscles, membranes, and corrosion technology can be given as examples for the application of the conductive polymers [15]. Conductive polymers can be synthesized via chemical [16,17] or electrochemical methods [18][19][20]. Their easy preparation, high conductivity, and stability enabled them to be used in enzyme immobilization [21].…”