Adsorption and inhibitive properties of methanol extract of Eeuphorbia Heterophylla for the corrosion of copper in 0.5 M nitric acid solutions

• Autorzy: Fouda A. S. , Elmorsi M. A. , Abou-Elmagd B. S.

Identyfikatory

DOI

10.1515/pjct-2017-0014

• Języki publikacji: EN

Abstrakty

EN

The adsorption and the inhibitive properties of methanol extract of Euphorbia heterophylla on copper in 0.5 M HNO₃  have been studied by weight loss method at different temperatures (30-50°C), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. Also, the surface morphology was analyzed by scanning electron microscopy (SEM). It was found that the inhibition efficiency increases with increasing extract doses and decreased with increasing temperature. The polarization data revealed that this extract acts as mixed type inhibitor. The adsorption process was more favored at lower temperatures with larger negative standard free energy. The extract was adsorbed physically on the copper surface followed Frumkin isotherm.

Słowa kluczowe

EN

acid corrosion; copper; green inhibitor; adsorption; kinetic parameters

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2017
• Tom: Vol. 19, nr 1
• Strony: 95--103
• Opis fizyczny: Bibliogr. 34 poz., rys., tab.

Twórcy

autor

Fouda A. S.

• Mansoura University, Chemistry Department, Faculty of Science, Mansoura, Egypt

autor

Elmorsi M. A.

• Tanta University, Chemistry Department, Faculty of Science, Tanta, Egypt

autor

Abou-Elmagd B. S.

• Mansoura University, Chemistry Department, Faculty of Science, Mansoura, Egypt

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).