Corrosion inhibition performance of a ionic liquid surfactant Br

• Main Authors: Jing LIU, Dishun ZHAO, Ran LIU, Ming WANG, Peibing REN
• Format: Article
• Language: zho
• Published: Hebei University of Science and Technology 2016-02-01
• Series: Journal of Hebei University of Science and Technology
• Subjects: electrochemistry; ionic liquid; surfactant; electrochemical; corrosion inhibition; adsorption
• Online Access: http://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b201601012&flag=1&journal_

In order to study the novel green organic mercury-substituting inhibitors, the ionic liquid surfactant 1-methyl-3-dodecyl imidazole bromide ( Br) is synthesized with N-methyl imidazole and 1-bromodecane as raw materials. The corrosion inhibition of Br for zinc in zinc-manganese batteries is investigated using electrochemical methods and weight loss methods. The results show that corrosion inhibition efficiency increases with the increase of the concentration of Br, and when the concentration is higher than 8×10<sup>-3</sup> mol/L, the inhibition efficiency tends to be stable. The polarization curve shows that Br belongs to mixed-type corrosion inhibitor. The thermodynamic parameters show that Br is spontaneously adsorbed on the zinc surface, forming a monomolecular adsorption layer, which fits with Langmuir adsorption isotherm with physical and chemical adsorption mechanism.