CORROSION BEHAVIOR OF P110 TUBE AND CASING STEEL IN THE ENVIRONMENT OF SULFUR DEPOSITION

J Chin Soc Corr Pro

2010, Vol. 30

Issue (2): 161-165 DOI:

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CORROSION BEHAVIOR OF P110 TUBE AND CASING STEEL IN THE ENVIRONMENT OF SULFUR DEPOSITION

CAI Xiaowen; GE Lei; CHEN Changfeng; YU Haobo

Department of Materials Science and Engineering; China University of Petroleum; Beijing 102249

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Abstract

Corrosion rate of P110 steel was investigated by the mass loss method in sulfur deposition environment with different temperature and different acid of the experimental system that simulated the downhole environment of PUGUANG gas field. Meanwhile, the corrosion product scales were analyzed by SEM, EDS and XRD technology, and the method of electrochemistry was used to test the effect of sulfur to corrosion rate. The results showed that the reason why the corrosion rate greatly increased is the disproportionation reaction resulting in the increasing of H⁺ and HS^-/S^2- which were more aggressive than Cl^-. The corrosion rate firstly increased and then decreased with the temperature and time increasing, and the content of sulfur of corrosion products increased from the matrix to the outer layer. The result of film potential measure indicated that the increasing of corrosion rate was closely related to the inhancing of the anion selective of the corrosion product scales.

Key words: elemental sulfur sulfur deposition disproportionation reaction film potential

Received: 26 October 2009

ZTFLH:

TG174.2

Corresponding Authors: GE Lei E-mail: gelei08@eyou.com

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Cite this article:

CAI Xiaowen; GE Lei; CHEN Changfeng; YU Haobo. CORROSION BEHAVIOR OF P110 TUBE AND CASING STEEL IN THE ENVIRONMENT OF SULFUR DEPOSITION. J Chin Soc Corr Pro, 2010, 30(2): 161-165.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2010/V30/I2/161

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