期刊
MATERIALS
卷 16, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/ma16020678
关键词
corrosion inhibitor; weight loss; electrochemistry; density functional theory; Monte Carlo simulation
In this study, the anticorrosion properties of PPD for mild steel in 1 M HCl were investigated using various analysis techniques. The results indicated that PPD acted as a mixed-type inhibitor with high protective efficiency. The adsorption of PPD followed Langmuir's adsorption isotherm and the corrosion process of mild steel was controlled by charge transfer.
In this study, 1,5-diallyl-1H-pyrazolo [3,4-d] pyrimidin-4 (5H)-one (PPD) was evaluated as an anticorrosion agent for mild steel (MS) in 1 M HCl. The analysis was performed by weight loss (WL), potentiodynamic polarization measurement, and electrochemical impedance spectroscopy (EIS). The Tafel polarization showed that PPD is a mixed-type inhibitor and reaches 94% of the protective efficiency at 10(-3) M. EIS results indicated that the resistance to charge transfer increases with increasing inhibitor concentration and the corrosion of MS is controlled by a charge transfer process. The inhibitor adsorption on the MS surface obeyed the Langmuir's adsorption isotherm. Thermodynamic parameters were calculated to elaborate the corrosion inhibition mechanism. The micrographic analysis revealed the existence of a barrier layer on the electrode surface with the presence of PPD. Theoretical examinations performed by electronic/atomic computer simulations confirmed that the obtained results were found to be consistent with experimental findings.
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