The effect of low concentrated green inhibitors based on Ce-adipate and Ce-chloride on the corrosion of 7075 aluminum alloy in neutral NaCl electrolyte was studied.Corrosion studies were carried out using electrochemi...The effect of low concentrated green inhibitors based on Ce-adipate and Ce-chloride on the corrosion of 7075 aluminum alloy in neutral NaCl electrolyte was studied.Corrosion studies were carried out using electrochemical impedance spectroscopy(EIS)and linear sweep voltammetry(LSV)while scanning electron microscopy(SEM)and X-ray photoelectron spectroscopy(XPS)were used to conduct surface studies of the alloy upon immersion in the corrosion media.The electrochemical experiments reveal a better inhibitory effect of Ce-adipate than Ce-chloride owing to a higher polarization resistance value(about two times),and a lower corrosion current density.However,both inhibitors act as cathodic inhibitors,show high resistance to pitting corrosion,and enable sufficient protection during prolonged immersion(240 h)in corrosion media.The XPS analysis confirms the presence of cerium in the oxidation states of Ce(III)and Ce(IV)together with the carboxylate-COO−groups and C-C and C-H bonds on the tested specimen with Ce-adipate inhibitor,which are connected to the increased anti-corrosion efficiency.展开更多
基金financially supported by the Ministry of Science,Technological Development and Innovation of the Republic of Serbia(Nos.451-03-66/2024-03/200026,451-03-65/2024-03/200135)。
文摘The effect of low concentrated green inhibitors based on Ce-adipate and Ce-chloride on the corrosion of 7075 aluminum alloy in neutral NaCl electrolyte was studied.Corrosion studies were carried out using electrochemical impedance spectroscopy(EIS)and linear sweep voltammetry(LSV)while scanning electron microscopy(SEM)and X-ray photoelectron spectroscopy(XPS)were used to conduct surface studies of the alloy upon immersion in the corrosion media.The electrochemical experiments reveal a better inhibitory effect of Ce-adipate than Ce-chloride owing to a higher polarization resistance value(about two times),and a lower corrosion current density.However,both inhibitors act as cathodic inhibitors,show high resistance to pitting corrosion,and enable sufficient protection during prolonged immersion(240 h)in corrosion media.The XPS analysis confirms the presence of cerium in the oxidation states of Ce(III)and Ce(IV)together with the carboxylate-COO−groups and C-C and C-H bonds on the tested specimen with Ce-adipate inhibitor,which are connected to the increased anti-corrosion efficiency.
