Water soluble corrosion inhibitors for copper in 3.5 wt% sodium chloride solution

In this study, synthesis of water soluble and efficient corrosion inhibitors PBTB carrying single benzotriazole part and PDBTB containing double benzotriazole segments for copper in 3.5 wt% sodium chloride solution was proposed. PDBTB showed greater corrosion inhibition effect than PBTB basing on survey results of polarization curves, impedance spectroscopy and scanning electron microscopy. Adsorption mechanism of the studied inhibitors on copper surface was studied by FT-IR spectra, X-ray photoelectron spectroscopy, X-ray diffraction spectra as well as adsorption isotherm.