Title :
Electrochemical Tests on the Optimum Cathodic Protection Potential of X70 Steel in the Presence of AC Interference
Author :
Li, Zili ; Hao, Hongna ; Ding, Qingmiao
Author_Institution :
Sch. of Storage & Transp. & Archit. Eng., Univ. of Pet., Qingdao, China
Abstract :
The presence of alternating current (AC) may cause serious damage on buried pipelines even when the off-potential matches -0.85V CSE criterion. The optimum cathodic protection potential (OCPP) is proved to be a more accurate parameter of cathodic protection. This paper applied electrochemical impedance spectroscopy (EIS) to investigate the OCPP of X70 steel in soil simulating solution. The results of laboratory experiments proved that electrochemical methods can determine the OCPP and suggested the OCPP ofX70 steel -900 mVSCE when AC induced voltage was less than 6V while about -1000 VSCE when it was more than 7V.
Keywords :
corrosion protection; electrochemical analysis; steel; AC induced voltage; AC interference; CSE criterion; X70 steel; alternating current; electrochemical impedance spectroscopy; electrochemical tests; optimum cathodic protection potential; pipelines; soil simulating solution; voltage -0.85 V; voltage -900 mV; Computers; Distributed control; Monitoring; AC induced corrosion; Electrochemical impedance spectroscopy; optimum cathodic protection potential;
Conference_Titel :
Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM), 2011 International Conference on
Conference_Location :
Changsha
Print_ISBN :
978-1-61284-278-3
Electronic_ISBN :
978-0-7695-4350-5
DOI :
10.1109/CDCIEM.2011.284
