The study of copper corrosion in the presence of selected triazole derivatives

U ovom radu efikasnost odabranih derivata tiazola u inhibiciji korozije bakra u kiseloj sulfatnoj sredini određena je u funkciji koncentracije inhibitora metodom merenja gubitka mase, elektrohemijskom impedansnom spektroskopijom i potenciostatskom polarizacijom. Polarizacionim merenjima takođe je određena zavisnost inhibitorske efikasnosti od temperature i kinetički parametri procesa korozije bakra kao i model adsorpcione izoterme prema kojem se odigrava proces adsorpcije inhibitora i odgovarajući termodinamički parametri. Merenjima kvarc kristalnom mikrovagom in situ je praćen proces elektrohemijskog rastvaranja bakra i adsorpcije ispitivanih inhibitora. SEM/EDX analizom proučavana je promena morfologije bakarne površine usled dejstva korozione sredine i rastvora inhibitora. Rezultati eksperimentalnih ispitivanja korelirani su sa teorijskim proračunima na nivou teorije funkcionala gustine.In this work, the efficiency of selected thiazole derivatives in the inhibition of corrosion of copper in the acidic sulfate solution is determined in the function ofthe inhibitors concentration by weight loss method, electrochemical impedance spectroscopy and potentiostatic polarization. The dependence of the inhibition efficiency of temperature and kinetic parameters of the process of corrosion ofcopper as well as adsorption isotherm model according to which takes place the process of adsorption of inhibitors and the corresponding thermodynamic parameters were also determined by polarization measurements. A process of electrochemical copper dissolution and adsorption of tested inhibitors is followedin situ by quartz crystal microbalance measurements Changes in the morphology of the copper surface due to the effects of corrosive environment and the solutions of the inhibitors were studied by SEM/EDX analysis.The experimental results were correlated with theoretical calculations at the density functional theory level