2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 7: Ionic Liquids & Energy Production
| Editors: | Kongoli F, Gaune-Escard M, Mauntz M, Rubinstein J, Dodds H.L. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 310 pages |
| ISBN: | 978-1-987820-30-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Ionic Liquids as Inhibitors of Copper Corrosion in Acidic Media
Gyongyi Vastag1; Jelena Nakomcic1; Sanja Dozic1; Slobodan Gadzuric1;1FACULTY OF SCIENCES, UNIVERSITY OF NOVI SAD, Novi Sad, Serbia and Montenegro (formerly Yugoslavia);
Type of Paper: Regular
Id Paper: 185
Topic: 13
Abstract:
The possibility of copper protection against corrosion using newly synthesized 1-butyl-3-ethylimidazolium bromide ionic liquid as potential inhibitor in acidic 0.1 M sodium sulphate solution (pH=3) was investigated by weight loss, dc polarization and electrochemical impedance spectroscopy (EIS) methods. All applied methods confirmed that tested compound has good inhibitory properties against corrosion of copper in acidic environment at the given conditions. It was found that [beim]Br acts as a mixed inhibitor, whereby its effectiveness depends on the applied concentration. The results also indicate that the [beim]Br ions are adsorbed on the surface quickly and spontaneously forming stable film which was able to protect the copper against corrosion in acidic media. On the basis of the parameters obtained by the polarization measurements, the mechanism of copper dissolution was discussed in the absence and in the presence of inhibitor. EIS results showed that the effect of the investigated ionic liquid in copper protection manifests through an increase of the total resistance and a decrease of the double layer capacitance compared with the blank solution.