Corrosion investigation of steel alloy in ethylene glycol-water mixture

سال انتشار: 1390
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,020

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شناسه ملی سند علمی:

IPEC03_075

تاریخ نمایه سازی: 7 تیر 1393

چکیده مقاله:

The electrochemical behavior of steel alloy in ethylene glycol-water mixture with different concentrations was investigated by polarization curves, AC impedance measurements, current transient and atomic force microscopy. The results obtained showed that corrosion rate was decreased with increasing ethylene glycol concentration. The effect of molybdate as inhibitor was studied and high inhibition efficiency was obtained. It was found that surface passivation was occurred in presence of inhibitor. The inhibiting effect of the molybdate was explained on the basis of the competitive adsorption between the inorganic anions and the aggressive Cl- ions and the adsorption isotherm basically obeysthe Langmuir adsorption isotherm.Thermodynamicparameters for steel corrosion and inhibitor adsorption were determined and reveal that the adsorption process is spontaneous. Also phenomenon of physical adsorption is proposed.

کلیدواژه ها:

Steel 4130- Ethylene glycol- Corrosion- adsorption-molybdate

نویسندگان

I Danaee

Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran

M NiknejadKhomami

Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran

A.A Attar

Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran

M Peykari

Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran

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