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Abstract

Inhibition performance and adsorption behaviour of lauric acid in acidic and near neutral environments were investigated by electrochemical and surface analysis methods. The results showed that the inhibition ability and the minimum effective inhibitor concentration are both pH dependent. The former decreased and the latter increased with pH value. The adsorption of the inhibitor was the predominant mechanism at lower pH values, with the formation of a protective adsorption film. At higher pH value, the inhibitor cannot prevent the corrosion process effectively and hence the adsorption of the inhibitor and formation of FeCO₃ like corrosion product coexisted. The difference of inhibition performance can be ascribed to the different adsorption state of the inhibitor on metal surface at different pH value resulting in a different interaction with the metal surface, which was validated by vibrational spectroscopy (attenuated total reflection Fourier transform infrared spectroscopy).

Keywords

CO2 CORROSION INHIBITION EFFICIENCY ADSORPTION PH LAURIC ACID CARBON STEEL

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References

S. L.

Garcia

J. G.

and M:

A.M.

Proc. Corrosion 96 Houston, TX, USA March 1996 NACE, Paper 21.

Papavinasam

Revie

R. W.

Attard

Demoz

and MIchaelian

: Corrosion 2003 59, (12), 1096–1111.

Moiseeva

L. S.

and Rashevskaya

N. S.

: Russ. J. Appl. Chem., 2002 75, (10), 1625–1633.

Jovancicevic

Ramachandran

and Prince

: Corrosion 1980 36, (8), 416.

Mora-Mendoza

J. L.

and Turgoose

: Corros. Set 2002, 44 1223–1246.

de Marco

Durnie

Jefferson

and Kinsella

: Corrosion 2001 57, (1), 9–18.

Malik

: Anti-Corros. Methods Mater., 1999 46, (6), 434–438.

Hernandez

and R:

J.R.

Proc. Corrosion 98, San Diego CA, USA June-July 1998 NACE, Paper 23.

Chen

: ‘Inhibition mechanisms of corrosion inhibitors in multiphase flow conditions using electrochemical techniques’

PhD thesis

Ohio University

2000.

10.

Kuznetsov

Y. I.

and AK. Ibatullin: Zashchita Metallov 2002 38, (5), 496–501.

11.

Negié

: Proc. 16th Int. Corrosion Cong. Beijing, China September 2005

The International Corrosion Council

19–24.

12.

Popova

Sokolova

Raicheva

and Christov

: Corros. Set 2003 45 33–58.

13.

Kinsella

Tan

Y. J.

and Bailey

: Corrosion 1998 54 835–842.

14.

Tan

Y. J.

Bailey

and Kinsella

: Corros. Sci., 1996 38, (9), 1545–1561.

15.

de Marco

Durnie

Jefferson

and Kinsella

: Corrosion 2001 57, (1), 9–18.

16.

de Marco

Durnie

Jefferson

Kinsella

and Crawford

: Corrosion 2002 58, (4), 354–363.

17.

Mansfeld

Kendig

M. W.

and Lorenz

W. J.

: J. Electrochem. Soc., 1985 132 290–296.

18.

Lopez

D. A.

Simison

S. N.

and de Sanchez

S. R.

: Electrochim. Acta 2003 48 (7) 845–854.

19.

Chen

Hong

Gopal

and Jepson

W. P.

: Corros. Set 2000 42 979–990.

20.

Lin

J. Y.

Tan

K.L.

and Lee

J.Y.

: Electrochim. Acta 1997 42, (4), 605–615.

Study of inhibition performance and adsorption behaviour of lauric acid on N80 steel in acidic and near neutral environments

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