BEHAVIOR OF CO2 PITTING CORROSION OF N80 STEEL

J Chin Soc Corr Pro

2003, Vol. 23

Issue (1): 21-25 DOI:

Research Report

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BEHAVIOR OF CO2 PITTING CORROSION OF N80 STEEL

Changfeng Chen;Minxv Lu;Guoxian Zhao

北京科技大学材料科学与工程学院

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Abstract In simulating the environment of CO2 corrosion in oilfield,the XRD，EDS and SEM techniques were adopted to study the formation an d development of CO2 pitting corrosion on N80 steel.The results demonstrated t hat Cl- anions could be enriched and nucleated at the interface between corros ion scale and matrix,which subsequently catalyzed the formation of pitting.Where as pits could also be enriched by Cl- forming approximately 3 μm enrichment l ayer at interface,thus leading to the further development of pitting.In present case,the relationship between mechanisms of anodic reaction and morphology of pi tting was discussed.

Key words: CO2 corrosion pitting N80 steel corrosion scale

Received: 04 April 2001

ZTFLH:

TG174

Corresponding Authors: Changfeng Chen

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Changfeng Chen; Minxv Lu; Guoxian Zhao. BEHAVIOR OF CO2 PITTING CORROSION OF N80 STEEL. J Chin Soc Corr Pro, 2003, 23(1): 21-25 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2003/V23/I1/21

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