物理化学学报 >> 2008, Vol. 24 >> Issue (12): 2236-2242.doi: 10.1016/S1872-1508(08)60085-6

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酸性介质中羧甲基纤维素钠在低碳钢表面的吸附和缓蚀作用

BAYOL E., GVRTEN A. A., DURSUN M., KAYAKIRILMAZ K.   

  1. Department of Chemistry, Faculty of Science and Art, Nigde University, 51200 Nigde, Turkey
  • 收稿日期:2008-06-12 修回日期:2008-09-03 发布日期:2008-12-04
  • 通讯作者: BAYOL E. E-mail:emelbayol@nigde.edu.tr

Adsorption Behavior and Inhibition Corrosion Effect of Sodium Carboxymethyl Cellulose on Mild Steel in Acidic Medium

BAYOL E., GVRTEN A. A., DURSUN M., KAYAKIRILMAZ K.   

  1. Department of Chemistry, Faculty of Science and Art, Nigde University, 51200 Nigde, Turkey
  • Received:2008-06-12 Revised:2008-09-03 Published:2008-12-04
  • Contact: BAYOL E. E-mail:emelbayol@nigde.edu.tr

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摘要： The effect of sodiumcarboxymethyl cellulose (Na-CMC) on the corrosion behavior of mild steel in 1.0 mol·L-1 HCl solution has been investigated by using weight loss (WL) measurement, potentiodynamic polarization, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) methods. These results showed that the inhibition efficiency of Na-CMC increased with increasing the inhibitor concentration. Potentiodynamic polarization studies revealed that the Na-CMC was a mixed type inhibitor in 1.0 mol·L-1 HCl. The adsorption of the inhibitor on mild steel surface has been found to obey the Langmuir isotherm. The effect of temperature on the corrosion behavior of mild steel in 1.0 mol·L -1 HCl with addition of 0.04% of Na-CMC has been studied in the temperature range of 298-328 K. The associated apparent activation energy (E*a) of corrosion reaction has been determined. Scanning electron microscopy (SEM) has been applied to investigate the surface morphology of mild steel in the absence and presence of the inhibitor molecules.

关键词: Corrosion, Mild steel, Adsorption, Sodiumcarboxymethyl cellulose, Electrochemical impedance spectroscopy

Abstract: The effect of sodiumcarboxymethyl cellulose (Na-CMC) on the corrosion behavior of mild steel in 1.0 mol·L-1 HCl solution has been investigated by using weight loss (WL) measurement, potentiodynamic polarization, linear polarization resistance (LPR), and electrochemical impedance spectroscopy (EIS) methods. These results showed that the inhibition efficiency of Na-CMC increased with increasing the inhibitor concentration. Potentiodynamic polarization studies revealed that the Na-CMC was a mixed type inhibitor in 1.0 mol·L-1 HCl. The adsorption of the inhibitor on mild steel surface has been found to obey the Langmuir isotherm. The effect of temperature on the corrosion behavior of mild steel in 1.0 mol·L -1 HCl with addition of 0.04% of Na-CMC has been studied in the temperature range of 298-328 K. The associated apparent activation energy (E*a) of corrosion reaction has been determined. Scanning electron microscopy (SEM) has been applied to investigate the surface morphology of mild steel in the absence and presence of the inhibitor molecules.

Key words: Corrosion, Mild steel, Adsorption, Sodiumcarboxymethyl cellulose, Electrochemical impedance spectroscopy