Electrochemical synthesis and corrosion behavior of poly 3-amino-5-hydroxy-pyrazol on copper electrode in 3.5% NaCl solution

Electrochemical synthesis of poly 3-amino-5-hydroxy-pyrazol on the surface of copper electrode was obtained by cyclic voltammetry technique in 0.3 M oxalic acid solution containing 0.03 M 3-amino-5-hydroxy-pyrazol. The synthesized poly 3-amino-5-hydroxy-pyrazol nanoparticles (PAHP) were investigated by cyclic voltammetry (CV), Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectroscopy and scanning electron microscopy (SEM). The corrosion behavior of PAHPll coated copper was studied using the change of open circuit potential with exposure time (Eocp-t), electrochemical impedance spectroscopy (EIS) and anodic polarization curves in 3.5% NaCl solution at room temperature. A high quality PAHP film with a dark brown color was formed on the surface of copper. Corrosion tests demonstrated that PAHP coating created corrosion protection in long immersion times in 3.5% NaCl solution due to the formation of a good barrier effect against the attack of corrosive factors [1-3].