CORROSION INHIBITION OF OIL-FLOODING REAGENTS FOR MILD STEEL IN TERTIARY OIL RECOVERY

J Chin Soc Corr Pro

1999, Vol. 19

Issue (5): 306-310 DOI:

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CORROSION INHIBITION OF OIL-FLOODING REAGENTS FOR MILD STEEL IN TERTIARY OIL RECOVERY

Zehua Dong;;;

武汉华中科技大学化学系

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Abstract The corrosion performance of mild steel A3 in oilfield refilling water containing oil flooding reagent such as polymer HPAM and petroleum sulfonate (PS)has been investigated by immersion weight loss, potentiodynamic polarization and EIS.It was found that mild steel was under active dissolution in both HPAM and PS solutions.Inhibition efficiency of HPAM increased with the increade in its concentration.EIS presented a single capacitive loop,showing the characteristics of HPAM absorption.However,EIS in PS solution indicated two capacitive loops with lower dispersion coefficient.Moreover,when the PS concentration exceeded 0.06%(w/w).beyond its CMC(critical micelle concentration ) in aqueous solution,its inhibition efficiency decreased due to the desorption of PS from steel surface.

Key words: mild steel tertiary oil recovery inhibitor desorption CMC

Received: 26 October 1998

Corresponding Authors: Zehua Dong

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Cite this article:

Zehua Dong. CORROSION INHIBITION OF OIL-FLOODING REAGENTS FOR MILD STEEL IN TERTIARY OIL RECOVERY. J Chin Soc Corr Pro, 1999, 19(5): 306-310 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I5/306

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