TY - JOUR
T1 - Characterisation of soil/pipe interface at a pipeline failure after 36 years of service under impressed current cathodic protection
AU - Quej-Aké, L.
AU - Nava, N.
AU - Espinosa-Medina, M. A.
AU - Liu, H. B.
AU - Alamilla, J. L.
AU - Sosa, E.
N1 - Publisher Copyright:
© 2015 Institute of Materials, Minerals and Mining.
PY - 2015/5
Y1 - 2015/5
N2 - Study on corrosion behaviour of buried pipeline in saline soil is presented, the pipeline is protected by coating and impressed current cathodic protection system. In this work, spectrometric and spectroscopic techniques were used to characterise the pipe/coating/soil interfaces. The results show the coating/pipe interface forms corrosion products including the following phases: magnetite, goethite, akaganeite and hematite. However, the main phases found at coating/soil interface are magnetite and ferric ion. The behavior is consistent with the corrosion of carbon steel in soil with oxygen and chloride ion. The reaction paths are proposed under the conditions of deteriorated coating, cathodic protection, saline soil and seasonal fluctuations.
AB - Study on corrosion behaviour of buried pipeline in saline soil is presented, the pipeline is protected by coating and impressed current cathodic protection system. In this work, spectrometric and spectroscopic techniques were used to characterise the pipe/coating/soil interfaces. The results show the coating/pipe interface forms corrosion products including the following phases: magnetite, goethite, akaganeite and hematite. However, the main phases found at coating/soil interface are magnetite and ferric ion. The behavior is consistent with the corrosion of carbon steel in soil with oxygen and chloride ion. The reaction paths are proposed under the conditions of deteriorated coating, cathodic protection, saline soil and seasonal fluctuations.
KW - EIS
KW - Pipeline
KW - Soil corrosion
UR - http://www.scopus.com/inward/record.url?scp=84947581864&partnerID=8YFLogxK
U2 - 10.1179/1743278214Y.0000000226
DO - 10.1179/1743278214Y.0000000226
M3 - Artículo
SN - 1478-422X
VL - 50
SP - 311
EP - 319
JO - Corrosion Engineering Science and Technology
JF - Corrosion Engineering Science and Technology
IS - 4
ER -