Milk Thistle Leaves Aqueous Extract as a New Corrosion Inhibitor for Aluminum Alloys in Alkaline Medium

  • Khudhair Abbas Kareem Al-Rudaini Department of Chemistry, Collage of Since, University of Baghdad, Baghdad, Iraq
  • Khulood Abid Saleh Al-Saadie Department of Chemistry, Collage of Since, University of Baghdad, Baghdad, Iraq
Keywords: Aluminum alloy, milk thistle, Polarization, alkaline corrosion

Abstract

The aqueous extract of milk thistle (Silybum marianum) leaves as a green corrosion inhibitor for AA7051 aluminum alloy in sodium hydroxide solution was investigated at a range of temperatures. Potentiodynamic polarization findings exhibit a mixed–type inhibitor with directly increased inhibition efficiency with the concentration of inhibitor. The adsorption of the inhibitor on aluminum alloy obeys Langmuir isotherm and the kinetic as well as thermodynamic parameters were measured and discussed.

Published
2021-02-26
How to Cite
Al-Rudaini , K. A. K., & Al-Saadie , K. A. S. (2021). Milk Thistle Leaves Aqueous Extract as a New Corrosion Inhibitor for Aluminum Alloys in Alkaline Medium. Iraqi Journal of Science, 62(2), 363-372. https://doi.org/10.24996/ijs.2021.62.2.2
Section
Chemistry