Effects of sulphide ion on the corrosion behaviour of X52 steel in a carbon dioxide environment at temperature 40A degree C

The electrochemical behaviour of X52 steel in the presence of sulphide at 40A degree C in a CO2 environment was investigated using the methods of linear polarization resistance (LPR), potentiodynamic sweep, electrochemical impedance spectroscopy (EIS). In addition, the surface of X52 steel was also...

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Bibliographic Details
Published in:Materials chemistry and physics 2011-05, Vol.127 (1-2), p.347-352
Main Authors: Fatah, M C, Ismail, M C, Ari-Wahjoedi, B, Kurnia, KA
Format: Article
Language:English
Subjects:
Carbon dioxide
Corrosion rate
Electrochemical impedance spectroscopy
Ion concentration
Linear polarization
Pitting (corrosion)
Scanning electron microscopy
Steels
Sulfides
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Summary:The electrochemical behaviour of X52 steel in the presence of sulphide at 40A degree C in a CO2 environment was investigated using the methods of linear polarization resistance (LPR), potentiodynamic sweep, electrochemical impedance spectroscopy (EIS). In addition, the surface of X52 steel was also studied using scanning electron microscopy (SEM). The results showed that the corrosion rate of X52 steel increased with increasing concentration of sulphide ion. Potentiodynamic curve showed that there were changes in cathodic branch due to the change in the nature of cathodic reaction in the presence of sulphide ion. EIS analysis showed the higher sulphide ion concentration, the higher adsorbed species on the steel surface that contributed in the cathodic reaction. Furthermore, SEM results showed crevices on the scale which indicated pitting tendency in sulphide ion solutions. The less protective film, probably mackinawite, also contributed to the increase of corrosion rate in the presence of sulphide ion.
ISSN:0254-0584
DOI:10.1016/j.matchemphys.2011.02.016