B. Tan, Shengtao Zhang, Wenpo Li
Sep 25, 2019
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0
Influential Citations
69
Citations
Journal
Journal of Industrial and Engineering Chemistry
Abstract
Abstract Phenyl disulfide (PDF), 2,2′-dithiodipyridine (DDP), 5,5-dithiobis(1-phenyl-1H-tetrazole) (DPT) were studied as inhibitors for Cu in H 2 SO 4 via electrochemical methods, surface morphology analysis and theoretical calculations. Electrochemical experiments show that PDF, DDP and DPT can exhibit excellent corrosion inhibition performance. Their order of corrosion inhibition is DPT > DDP > PDF. Surface morphology analysis supports the electrochemical results. The X-ray photoelectron spectroscopy (XPS) results show that S Cu bonds are detected in PDF, DDP and DPT, and N Cu bonds are detected in DDP and DPT. PDF, DDP and DPT adsorption on the Cu surface obey the Langmuir isotherm model. The results of quantum chemical calculations show that DPT has more active reaction sites than DDP and PDF. Molecular dynamics simulation results show that the order of binding energies of the three corrosion inhibitor molecules on the copper surface is DPT > DDP > PDF.