Aisha Mahmood Al-Turkustani
Keywords: Ajowan plant, corrosion, inhibition, steel, acids, sulphuric acid.
Corrosion inhibition of steel in sulphuric acid by aqueous extract of Ajowan (carom) seeds has been studied using chemical (HE and ML) and electrochemical (EIS and PDP) measurements at 30â°C. The results indicated that Ajowan extract inhibit the corrosion process in 2.0M H2SO4 and the inhibition efficiency increase as concentration increased. Impedance studies showed that the charge transfer controls the dissolution mechanism of steel across the phase boundary in the absence and the presence of the inhibitor and potentiodyanaic polarization results indicate that Ajowan seeds act as mixed type inhibitor. The inhibition efficiency obtained from various employed methods is approximately in good agreement. Adsorption process of Ajowan molecules on steel surface is spontaneous and it obeys the Friuendlish adsorption isotherm.
Because you are not logged-in to the journal, it is now our policy to display a 'text-only' version of the preprint. This version is obtained by extracting the text from the PDF or HTML file, and it is not guaranteed that the text will be a true image of the text of the paper. The text-only version is intended to act as a reference for search engines when they index the site, and it is not designed to be read by humans!
If you wish to view the human-readable version of the preprint, then please Register (if you have not already done so) and Login. Registration is completely free.ISSN 1466-8858 Volume 13, Preprint 19 submitted 11 May 2010 © 2010 University of Manchester and the authors. This is a preprint of a paper that has been submitted for publication in the Journal of Corrosion Science and Engineering. It will be reviewed and, subject to the reviewers" comments, be published online at http://www.jcse.org in due course. Until such time as it has been fully published it should not normally be referenced in published work. ⁰