Inhibition effect of horehound (Marrubium vulgare L.) extract towards C38 steel corrosion in HCl solution

• Published in: Research on chemical intermediates Vol. 39; no. 7; pp. 3291 - 3302
• Main Authors: Ben Hmamou, Dris, Salghi, Rachid, Zarrouk, Abdelkader, Zarrok, Hassan, Benali, Omar, Errami, Mohamed, Hammouti, Belkheir
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-09-2013
• Subjects: Catalysis; Chemistry; Chemistry and Materials Science; Inorganic Chemistry; Physical Chemistry; C38; Electrochemical techniques; Corrosion inhibition; Horehound extract
• ISSN: 0922-6168; 1568-5675
• DOI: 10.1007/s11164-012-0840-2

The corrosion inhibition properties of horehound (
Marrubium vulgare
L.) extract (HE) in 1 M hydrochloric acid medium was carried out using electrochemical methods (polarization curve and electrochemical impedance spectroscopy). Experiments were performed by concentration of the inhibitor and temperature effect. The results showed variation in inhibition performance of this plant extract. The Langmuir model was tested to describe the adsorption behavior of the inhibitor on the C38 steel surface. Some thermodynamic functions of dissolution processes were also determined.