Aqueous Extract of Creosote Bush (Larrea tridentata) Leaves as Green Inhibitor for Carbon Steel in Hydrochloric Acid Solution

作者：Garcia Inzunza Ramses; Valdez Salas Benjamin; Schorr Wiener Michael; Carrillo Beltran Monica; Zlatev Koytchev Roumen; Stoytcheva Stilianova Margarita; Ramos Irigoyen Rogelio; Vargas Osuna Lidia; Terrazas Gaynor Juan

来源：International Journal of Electrochemical Science, 2013, 8(5): 6433-6448.

• Inhibition
• Creosote Bush
• Carbon Steel
• Green Corrosion Inhibitor

The inhibition of carbon steel corrosion in hydrochloric acid solution by the aqueous extract leaves of Larrea tridentate (AELL), a plant of Baja California, Mexico, has been studied by weight loss and potentiodynamic polarization techniques. The effect of temperature and immersion time of carbon steel (CS) in 1 M HCl with addition of extract, was studied too. It was also shown that the higher aqueous extract added, the higher corrosion inhibition was found. The thermodynamic adsorption parameters are shown in order to demonstrate the spontaneous adsorption; metallographic analysis results are also presented. The inhibition of AELL was performed via adsorption of the extract species on the CS surface. Potentiodynamic polarization results indicate that the aqueous extract acts as a mixed type corrosion inhibitor. The aqueous extract of Creosote Bush was analyzed by FTIR spectroscopy and phytochemical analysis. The results obtained confirm that the leaves extract of Larrea tridentata could serve as an efficient corrosion inhibitor for CS in hydrochloric acid media.

• 出版日期2013-5