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51318-11084-The Application Limitation Boundary of Duplex Stainless Steel under Sour Condition in Oil Fields

Pitting failure boundary of duplex stainless steel under sour condition was investigated by electrochemical and immersion tests. Polarization measurements investigate the effect of temperature and H2S on the corrosion behavior.

Product Number: 51318-11084-SG
Author: Ziru Zhang / Zhu Wang / Junpeng Xue / Lei Zhang / Xian Tang / Minxu Lu
Publication Date: 2018
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In this paper, the pitting failure boundary of duplex stainless steel under sour condition was investigated by electrochemical and immersion tests. Polarization measurements are employed to investigate the effect of temperature and H2Son the corrosion behavior of Duplex Stainless Steel. And the pitting susceptibility is estimated by the further analysis of polarization curves and surface characterization. The results show that the pitting resistance of S31803 duplex stainless steel decreases with the increase of temperature and the H2S partial pressure. S31803 duplex stainless steel is pitting sensitive at around 85oC in 50kPa H2S, 130,000ppm Cl- condition.

 

Key words: Stainless steel, Pitting, Polarization curve, H2S, Immersion test

In this paper, the pitting failure boundary of duplex stainless steel under sour condition was investigated by electrochemical and immersion tests. Polarization measurements are employed to investigate the effect of temperature and H2Son the corrosion behavior of Duplex Stainless Steel. And the pitting susceptibility is estimated by the further analysis of polarization curves and surface characterization. The results show that the pitting resistance of S31803 duplex stainless steel decreases with the increase of temperature and the H2S partial pressure. S31803 duplex stainless steel is pitting sensitive at around 85oC in 50kPa H2S, 130,000ppm Cl- condition.

 

Key words: Stainless steel, Pitting, Polarization curve, H2S, Immersion test

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