Petroleum Science >2015,??Issue 2:??316-324 DOI: https://doi.org/10.1007/s12182-015-0022-0
Effects of alternating current interference on corrosion of X60 pipeline steel Open?Access
文章信息
作者：Yan-Bao Guo,Cheng Liu,De-Guo Wang and Shu-Hai Liu
作者單位：
College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China;College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China;College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China;College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China
投稿時間：2014-04-09
引用方式：Guo, YB., Liu, C., Wang, DG. et al. Pet. Sci. (2015) 12: 316. https://doi.org/10.1007/s12182-015-0022-0
文章摘要
With rapid economic development in China,
demand for energy and transportation is growing. Due to
the limitations of factors such as terrain and traffic, a large
number of buried oil and gas pipelines are parallel to highvoltage
transmission lines and electrified railways over
long distances. Alternating current (AC) corrosion of
pipelines is very serious in such cases. In this work,
laboratory experiments were carried out with an electrochemical
method in a simulated soil solution at various AC
current densities from 0 to 200 A/m2 and AC frequencies
from 10 to 200 Hz. Experimental results indicated that with
an increase in the AC current density, the corrosion potential
of an X60 steel electrode shifted negatively, the
anodic current density increased significantly, and the
corrosion rate increased. Moreover, with an increase in the
AC frequency, the corrosion potential of the X60 electrode
shifted positively and the anodic current density decreased,
which led to a decrease in the corrosion rate. Furthermore,
the morphology of X60 electrodes indicated that uniform
corrosion occurred at a low AC current density; while
corrosion pits were found on the X60 electrode surface at a
high AC current density, and deep corrosion pits seriously
damaged the pipelines and might lead to leakage.
demand for energy and transportation is growing. Due to
the limitations of factors such as terrain and traffic, a large
number of buried oil and gas pipelines are parallel to highvoltage
transmission lines and electrified railways over
long distances. Alternating current (AC) corrosion of
pipelines is very serious in such cases. In this work,
laboratory experiments were carried out with an electrochemical
method in a simulated soil solution at various AC
current densities from 0 to 200 A/m2 and AC frequencies
from 10 to 200 Hz. Experimental results indicated that with
an increase in the AC current density, the corrosion potential
of an X60 steel electrode shifted negatively, the
anodic current density increased significantly, and the
corrosion rate increased. Moreover, with an increase in the
AC frequency, the corrosion potential of the X60 electrode
shifted positively and the anodic current density decreased,
which led to a decrease in the corrosion rate. Furthermore,
the morphology of X60 electrodes indicated that uniform
corrosion occurred at a low AC current density; while
corrosion pits were found on the X60 electrode surface at a
high AC current density, and deep corrosion pits seriously
damaged the pipelines and might lead to leakage.
關鍵詞
-
Alternating current interference X60pipeline steel Corrosion AC current density ACfrequency