Inhibitive Assessment of N-(8-bromo-3H-phenoxazin-3-ylidene)-N,N’-Dimethylaminium, as a Novel Corrosion Inhibitor for Mild Steel in 1.0 M HCl

Journal of Advanced Materials and Processing

مقاله 4، دوره 2، شماره 3، آبان 2014، صفحه 27-38   

نوع مقاله: Research Paper

نویسندگان

Mansoor Bozorg¹؛ Taghi Shahrabi Farahani^{* 1}؛ Ghodsi Mohammadi Ziarani²؛ Jaber Neshati³؛ Zahra Chaghazardi¹؛ Parisa Gholamzadeh²؛ Fatemeh Ektefa⁴

¹Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran.

²Department of Chemistry, Alzahra University, Tehran, Iran.

³Research Institute of Petroleum Industry, RIPI, Tehran, Iran.

⁴Department of Chemistry, Faculty of Science, Tarbiat Modares University, Tehran, Iran.

چکیده

The inhibition effect of N-(8-bromo-3H-phenoxazin-3-ylidene)-N,N’-dimethylaminium (DPhDMA) on the corrosion behavior of mild steel in 1.0 M HCl solution has been studied. Weight loss measurements, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and quantum chemical calculations were used in this study. Electrochemical results revealed that DPhDMA is an effective mixed type inhibitor for mild steel in 1.0 M HCl solution, and its inhibition efficiency increased with increasing its concentration and with the immersion time of the samples in the corrosive media. The adsorption of DPhDMA also led to a reduction in electric double layer capacitance and an increase in charge transfer resistance confirming its inhibitive effect on the corrosion behavior of mild steel samples. The thermodynamic parameters governing the adsorption process showed that DPhDMA was adsorbed spontaneously on mild steel surface through a combination of physical and chemical mechanisms following Langmuir adsorption isotherm. Quantum chemical calculations were used to correlate the performance of DPhDMA with its electronic structural parameters.

کلیدواژه‌ها

corrosion؛ Inhibitor؛ Mild steel؛ DPhDMA؛ EIS