Inhibitive impacts extract of Citrus aurantium leaves of carbon steel in corrosive media

ABSTRACT

Relatively inexpensive, stable plant extract, namely Citrus aurantium leaves, was employed as highly efficient inhibitor of carbon steel corrosion by corrosive acid. The inhibition efficiency was estimated based on the weight loss method. Inhibition impacts of researched inhibitor increase with the concentration of the plant extract increase. The inhibition efficiency depends on three factors: molecular structure, concentration, and molecular weight of the inhibitor. Inhibition efficiency of 81.2% was achieved with 20% (v/v) of the extract in 1 M hydrochloric acid during 3 h at 25°C. The effect of temperature was also investigated and activation parameters were evaluated. Inhibition adsorption characteristics were approximated by Langmuir adsorption isotherm. Chemical adsorption mechanism was proposed for the studied inhibitor from the trend of inhibition performance and temperature degree in addition to activation energy values and heat of adsorption.

GRAPHICAL ABSTRACT

KEYWORDS:

• Citrus aurantium
• carbon steel
• hydrochloric acid solution
• corrosion inhibition
• adsorption

Disclosure statement

No potential conflict of interest was reported by the authors.

ORCID

Ahmed A. Al-Amiery http://orcid.org/http://orcid.org/0000-0003-1033-4904

Notes on contributors

Rifat Mohammed Dakhil, Assistant professor of Chemical Engineering at Technical College Basra, Southern Technical University with research interests in Mass Transfer, published 40+ peer-reviewed international papers.

Tayser Sumer Gaaz, lecturer of mechanical Engineering at Department of Machinery Equipment Engineering Techniques, Technical College Al-Musaib, Al-Furat Al Awsat Technical University, with research interests in composites, published 25+ peer-reviewed international papers.

Ahmed A. Al-Amiery, full professor of chemistry science at University of Technology, with research interests in synthesis of novel applicable molecules, published 150+ peer-reviewed international papers with 16+ patents, awarded the Medal of scientific excellence (2014), and also hold Science awards from the Ministry of Higher Education and Scientific Research for four consecutive years (2010, 2011, 2012, 2013, 2014, 2015 and 2016, selected for the Who’s Who for International Executives 2015, selected for the one of the best mentalities of the world for 2016 by the University of Cambridge and TWAS- Young Affiliates.

Abdul Amir H. Kadhum, full professor of chemistry science at Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia with research interests in material sciences, published 250+ peer-reviewed international papers with 11+ patents.

Additional information

Funding

The authors thank UKM-YSD Chair on Sustainable Development for the grant 020-2017 “Malaysia” for supporting this work.