B. Tan, Shengtao Zhang, Y. Qiang
Jul 1, 2019
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0
Influential Citations
67
Citations
Journal
Journal of Molecular Liquids
Abstract
Abstract The food spices of difurfuryl disulfide (DFD) and furfuryl mercaptan (FFM) as corrosion inhibitors for copper in 0.5 M sulfuric acid were investigated via abundant testing methods. The electrochemical tests showed DFD and FFM exhibit excellent corrosion inhibition performance and can suppress both cathodic and anodic reactions for Cu in sulfuric acid. At 298 K, the potentiodynamic polarization test showed that the highest inhibition efficiencies of DFD and FFM were 97.5% and 98.9%, respectively. Surface morphology analysis strongly supports the results of electrochemical measurements. In addition, X-ray photoelectron spectroscopy (XPS) detected the Cu S bond. Adsorption of DFD and FFM on copper surface conforms to Langmuir isotherm model. Theoretical calculations are used to delve into the differences in corrosion inhibition performance between DFD and FFM. Finally, all experiments had proven that DFD's corrosion inhibition efficiency is better than that of FFM.