Zygophllum coccineum L. Extract as green corrosion inhibitor for copper in 1 M HNO3 Solutions
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Zygophllum coccineum L. Extract (ZCE), was investigated as a green corrosion inhibitor for copper in 1 M HNO3 solutions using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. Surface morphology was tested using scanning electron microscope (SEM). The effect of the temperature on corrosion behavior with addition of different concentrations was studied in the temperature range of 25-45 ºC by weight loss method. Polarization curves reveal that the investigated extract is a mixed type inhibitors. The inhibition efficiency was found to increase with increase in the investigated extract concentration and decrease with raising solution temperature. The adsorption of the inhibitor on copper surface was found to obey the Langmuir’s adsorption isotherm. The results obtained from chemical and electrochemical techniques are in good agreement.
[A.S. Fouda, Y.M. Abdallah, G.Y. Elawady and R.M. Ahmed (2014); Zygophllum coccineum L. Extract as green corrosion inhibitor for copper in 1 M HNO3 Solutions Int. J. of Adv. Res. 2 (Nov). 0] (ISSN 2320-5407). www.journalijar.com
