Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5M H2SO4

doi:10.11890/1006-7191-101-13

Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (1): 13-20.DOI: 10.11890/1006-7191-101-13

Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5M H2SO4

B. Hammouti¹;E. El Ouariachi²;J.³;M.⁴;A.⁴;A.⁴;J-M.³;J.³

1. Faculté des sciences-oujda
2. Faculte des sciences Oujda
3. UMR CNRS 6134; Laboratoire de Chimie des Produits Naturels; Université de Corse; France
4. Faculté des Sciences;BP717; 60 000 Oujda

收稿日期:2009-08-20 修回日期:2009-10-20 出版日期:2010-02-25 发布日期:2010-02-09
通讯作者: B. Hammouti

Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5 M H₂SO₄

E. El Ouariachi¹, J. Paolini², M.Bouklah¹, A. Elidrissi¹, A. Bouyanzer¹,B. Hammouti¹, J-M. Desjobert²,J. Costa²

1. Laboratoire de Chimie Appliquee et Environnement, Faculte des Sciences, Universite Mohamed Premier, BP717, 60 000 Oujda, Morocco
2. UMR CNRS 6134, Laboratoire de Chimie des Produits Naturels, Universite de Corse, France

Received:2009-08-20 Revised:2009-10-20 Online:2010-02-25 Published:2010-02-09
Contact: B. Hammouti

摘要/Abstract

摘要：

Rosmarinus officinalis essential oil obtained by hydrodistillation was tested as corrosion inhibitor of steel in 0.5M H2SO4 using weight loss measurements, and electrochemical polarisation methods. Results obtained indicate that R. officinalis oil inhibit corrosion process reduced the corrosion rate and its inhibition efficiency reaches 61% at 1 g/l. Polarisation curves were interpreted by a cathodic action. The inhibition efficiency of naturally oil remains slightly constant with the rise of temperature. Chemical analysis of R. officinalis essential oil was carried out using capillary GC and GC/MS. The oil composition was characterized by high amount of oxygenated monoterpene (77%) with 1,8-cineol (52.1%) as main component. Discussion of adsorption was been investigated on the basis of essential oil composition. Finally, the isotherm adsorption of essential oil on the steel has been also reported.

Abstract:

Rosmarinus officinalis essential oil obtained by hydrodistillation was tested as corrosion inhibitor of steel in 0.5~M H₂SO₄ using weight loss measurements, and electrochemical polarisation methods. Results obtained indicate that the corrosion rate is reduced and R.officinalis oil adsorbs on the metal surface and then inhibits corrosion process. Its inhibition efficiency increases with oil increasing content to reach 61 % at 1 g/L. Polarisation curves indicate that RO acts as a cathodic inhibitor. The inhibition efficiency of naturally oil remains slightly constant with the rise of temperature. Chemical analysis of R.~officinalis essential oil was carried out using capillary GC and GC/MS. The oil composition was characterized by high amount of oxygenated monoterpene (77 %) with 1,8-cineol (52.1 %) as main component. Discussion of adsorption was investigated on the basis of essential oil composition. Finally, the isotherm adsorption of essential oil on the steel has been also reported.

Key words: Rosmarinus officinalis oil, Adsorption, Corrosion, Inhibition, Steel, 1,8-cineol

B. Hammouti E. El Ouariachi J. M. A. A. J-M. J.. Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5M H2SO4[J]. Acta Metallurgica Sinica (English Letters), 2010, 23(1): 13-20.

E. El Ouariachi, J. Paolini, M.Bouklah, A. Elidrissi, A. Bouyanzer,B. Hammouti, J-M. Desjobert,J. Costa. Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5 M H₂SO₄[J]. Acta Metallurgica Sinica (English Letters), 2010, 23(1): 13-20.

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Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5M H2SO4

Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5 M H₂SO₄

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Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5 M H₂SO₄