caa a22 4500 475816102 CHVBK 20180406123810.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1023/A:1003956102631 doi (NATIONALLICENCE)springer-10.1023/A:1003956102631 Copper corrosion at various pH values with and without the inhibitor [Elektronische Daten] [M. Metikoš-Huković, R. Babić, I. Paić] The inhibitory action of BTAH on copper was investigated in 1 M sodium acetate solution in the pH range 4-10, using cyclic voltammetry and impedance spectroscopy. Cyclic voltammetry showed that the rearrangement of the surface oxide layer in the presence of BTAH is very fast in slightly alkaline solutions, while it is time- and concentration-dependent in neutral and slightly acidic solutions. The adsorption behaviour of BTAH on the electrode surface at c(BTAH) ≤ 0.5 mM followed a Flory-Huggins adsorption isotherm with ΔG ∘ ranging from −30.0 to −39.0 kJ mol−1, depending on the pH. Impedance spectra were characterized by two time constants relating to the charge transfer and transport of copper ions through the oxide layer, the latter being the rate determining step. These enabled the determination of important properties of the adsorbed layer and the passivated film. The results indicate that the surface layer is of dielectric nature, and its protection increases with increasing inhibitor concentration and solution pH. The finite diffusion impedance was analysed using a diffusion factor B, and the values of the diffusion coefficient and concentration of copper species in the film were estimated. Kluwer Academic Publishers, 2000 adsorbtion isotherm nationallicence benzotriazole nationallicence copper nationallicence corrosion nationallicence finite diffusion impedance nationallicence inhibition nationallicence Metikoš-Huković M. Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Savska c. 16/1, PO Box 117, 10 000, Zagreb, Croatia aut Babić R. Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Savska c. 16/1, PO Box 117, 10 000, Zagreb, Croatia aut Paić I. Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Savska c. 16/1, PO Box 117, 10 000, Zagreb, Croatia aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/5(2000-05-01), 617-624 0021-891X 30:5<617 2000 30 10800 https://doi.org/10.1023/A:1003956102631 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003956102631 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Metikoš-Huković M. Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Savska c. 16/1, PO Box 117, 10 000, Zagreb, Croatia aut NATIONALLICENCE 700 1- Babić R. Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Savska c. 16/1, PO Box 117, 10 000, Zagreb, Croatia aut NATIONALLICENCE 700 1- Paić I. Department of Electrochemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Savska c. 16/1, PO Box 117, 10 000, Zagreb, Croatia aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/5(2000-05-01), 617-624 0021-891X 30:5<617 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer