Journal of Applied Science and Engineering

Published by Tamkang University Press


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Pengli Ge1,2, Wenbin Pang1,2, Zhiming Liu1,2, Lili He1,2, and Jiang Meng3This email address is being protected from spambots. You need JavaScript enabled to view it.

1Northwest Company of China Petroleum and Chemical Corporation, SINOPEC, Urumqi, 830011, China

2Key Laboratory of Enhanced Recovery for Fracture-cave Oil Reservoir, SINOPEC, Urumqi, 830011, China

3School of Petroleum Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China



Received: October 23, 2023
Accepted: April 14, 2024
Publication Date: June 9, 2024

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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In order to investigate the effect of typical ions in produced water in oil and gas fields on the pipeline corrosion behavior, the corrosion behavior of N20 steel by HCO3 concentration in the environment with Cl, Ca2+, Mg2+ and SO2−4 wasstudied bymeansof weight loss measurement and electrochemical tests. The effects of HCO3 concentration on the corrosion of N20 steel were analyzed by means of optical microscope, scanning electron microscope, energy spectrum analyzer and electrochemical workstation. The results showed that in the range of HCO3 concentration in this work, the water sample has an obvious trend of CaCO3 scaling. With the increase of HCO3 concentration, the corrosion rate of N20 steel first increased and then decreased, and the corrosion control changed from discharge process and diffusion process to diffusion process. When the concentration of HCO3 is 200 mg/L,theuniform corrosion rate reaches the maximum. Due to the different HCO3 concentration, the density and distribution of the layers of scaling and corrosion products are different. Therefore, even if large-scale scaling occurs, local corrosion of N20 steel cannot be prevented due to the non-uniformity of scaling.


Keywords: produced water; HCO− 3 concentration; corrosion behavior; N20 steel

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