6533b871fe1ef96bd12d1b11

RESEARCH PRODUCT

Green approach to corrosion inhibition of stainless steel in phosphoric acid of Artemesia herba albamedium using plant extract

Abdellah GuenbourR.m. Fernández-domeneA. BellaouchouM. BoudaliaJosé García-antónMohamed Tabyaoui

subject

lcsh:TN1-997Materials science02 engineering and technology01 natural sciencesEssential oilINGENIERIA QUIMICAAbsorciólaw.inventionCorrosionBiomaterialssymbols.namesakechemistry.chemical_compoundCorrosion inhibitorAdsorptionlaw0103 physical sciencesPhosphoric acidEssential oillcsh:Mining engineering. MetallurgyInhibition010302 applied physicsTafel equationArtemisia herba-albaMetals and AlloysLangmuir adsorption model021001 nanoscience & nanotechnologyStainless SteelSurfaces Coatings and FilmsDielectric spectroscopyCorrosionchemistryCeramics and CompositessymbolsAdsorptionAcer Corrosió0210 nano-technologyNuclear chemistry

description

Essential oil from aerial parts of Artemisia herba-alba from Morocco was hydrodistilled and its chemical composition oil was investigated by capillary GC and GC/MS. The major components were 1,8-cineole (35.6%) and camphor (24.1%). Artemisia herba-alba essential oil AHAO was tested as corrosion inhibitor of stainless steel (SS) in 1M H3PO4 using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy measurements (EIS) and scanning electronically microscopy (SEM) studies. The results obtained showed that the essential oil of Artemisia reduces the corrosion rate. Tafel polarization method indicates that the plant extract behaves as a mixed type inhibitor. The inhibition efficiency increased with inhibitor concentration to attain 88% at 1 g.L−1 of oil at 298 K. Nyquist diagrams obtained from impedance studies provide results confirming the anti-corrosion effect of the studied plant. The temperature effect on the corrosion behavior of (SS) in 1M H3PO4 without and with AHAO at 1 g.L−1 was studied in the temperature range from 298 to 353 K. Thermodynamic parameters suggested that the adsorption is spontaneous and exothermic process and support physical adsorption mechanism. The experimental data fits well into the Langmuir adsorption isotherm model. SEM/EDS studies provide the confirmatory evidence for the protection of (SS) by the green inhibitor. The results obtained from these methods used are in good agreement. Keywords: Artemisia herba-alba, Essential oil, Corrosion, Inhibition, Stainless steel, Adsorption

yearjournalcountryeditionlanguage
2019-11-01
10.1016/j.jmrt.2019.09.045https://hdl.handle.net/10550/75776