Two Imidazole Based Corrosion Inhibitors for Protection of Bronze from Urban Atmospheres

Croatica Chemica Acta

Otmačić Ćurković, Helena^2¹  Supnišek Lisac, Ema^2²  Marušić, Katarina^1³ 

[1] Faculty of chemical engineering and technology, University of Zagreb, Marulićev trg 19, HR-10000 Zagreb, Croatia^2;LISE – UPR 15 du CNRS, Université Pierre et Marie Curie, Case 133, 4 Place Jussieu, 75252 Paris Cedex 05, France^3;Ruđer Bošković Institute, Radiation chemistry and dosimetry laboratory, Bijenička c. 54, HR-10000 Zagreb, Croatia^1

关键词: bronze;    corrosion;    inhibitor;    imidazole;    polarization;    electrochemical impedance spectroscopy;   

DOI  :  10.5562/cca3440

学科分类：化学（综合）

来源: Croatica Chemica Acta

【 摘 要 】

Two different imidazole based molecules were investigated as corrosion inhibitors for Cu-6Sn bronze in a sulphate/carbonate solution at pH 3 and 5 which simulate a mild and strong polluted urban environment. The tested corrosion inhibitors were 4-methyl-1-phenylimidazole (PMI) and 4-methy1-1-p-tolylimidazole (TMI). The difference between structures is in the additional para positioned methyl, –CH3, group in the phenyl ring of the TMI molecule. Their protective effect was investigated by different electrochemical methods: polarization in wide and narrow potential range and electrochemical impedance spectroscopy. The investigations have shown that both molecules give good protection to the bronze at pH 3, but only TMI showed a good effect at pH 5. The additional –CH3 group in TMI affects the orientation in which the molecule is absorbed on the surface. This work is licensed under a Creative Commons Attribution 4.0 International License .

【 授权许可】

CC BY