36 5Electrochemical Development of Ni-Cu Electrodes by Direct and Pulse Current Coating in Ethanol Electro-oxidation for DEFCA Kinetic Study of Oxalic Acid Electrochemical Oxidation on a Manganese Dioxide Rotating Cylinder Anode 
Home Page  

  • SciELO

  • SciELO


Portugaliae Electrochimica Acta

 ISSN 0872-1904

FOUDA, A. S.; RASHWAN, S. M.; DARWISH, M. M. K.    ARMAN, N. M.. Corrosion Inhibition of Zn in a 0.5 M HCl Solution by Ailanthus Altissima Extract. []. , 36, 5, pp.309-323. ISSN 0872-1904.  https://doi.org/10.4152/pea.201805309.

The inhibiting effect of Ailanthus altissima aqueous extract, as a corrosion inhibitor for Zn in a 0.5 M HCl solution, has been evaluated by weight loss (WL), hydrogen evolution (HE), potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. Obtained results showed that this extract offered good protection against Zn corrosion, and exhibited high inhibition efficiencies. The IE was found to increase with an increasing extract dose. Results revealed that this extract acted as a mixed-type inhibitor, and adsorbed onto the Zn surface following Temkin isotherm. Obtained results were justified from the study of surface morphology.

: ailanthus altissima extract; HCl; Zn; corrosion inhibition; WL; HE; PP; EIS; EFM; surface morphology.

        ·     · ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License