Influence of Imidazoline Inhibitor on CO2 Corrosion of N80 Steel in Annulus Zone of Pump Recovery Well

Zhen Bo Hou; Tian Hao Li; Xian Wei Lv; Bing Ge Fu

doi:10.4028/www.scientific.net/AMR.1061-1062.49

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1061-1062Influence of Imidazoline Inhibitor on CO2...

Influence of Imidazoline Inhibitor on CO₂ Corrosion of N80 Steel in Annulus Zone of Pump Recovery Well

Abstract:

The impact of CO₂ partial pressure ,fluid producing rate and corrosive medium on the CO₂ corrosion regularity of N80 steel and the inhibition efficiency of imidazoline inhibitor are investigated respectively through simulation of the actual working environment in the mined-out space of mechanical oil production wells by using high temperature and pressure reactor. According to the results, the corrosion rate of metals increases with CO₂ partial pressure but the inhibition efficiency of the inhibitor is hardly affected when CO₂ partial pressure in the scope of 1~3MPa. The increase of the fluid producing rate will accelerate the corrosion of metals and the inhibition efficiency will decline. With corrosion inhibitor applied, metals corrode slower in the liquid phase than in the gas in the initial stage, but latterly the corrosion rate is gradually higher than that in the gas phase.

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Periodical:

Advanced Materials Research (Volumes 1061-1062)

Pages:

49-54

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1061-1062.49

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Online since:

December 2014

Authors:

Zhen Bo Hou*, Tian Hao Li, Xian Wei Lv, Bing Ge Fu

Keywords:

Adsorption Film, CO₂ Corrosion, Corrosion Inhibitor, Corrosion Rate, Inhibition Efficiency

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