Two steps numerical method for calculating the AC interference from a faulty power line on nearby buried pipelines

2010 ◽  
Vol 21 (7) ◽  
pp. 2037-2052 ◽  
Author(s):  
Giovanni Lucca
Keyword(s):  
Numerical Method ◽  
Power Line ◽  
Buried Pipelines ◽  
Ac Interference

A Real-Time AC/DC Measurement Technique for Assessment of AC Corrosion of Buried Pipelines

2012 ◽  
Author(s):  
Cindy X. Su ◽  
Luyao Xu ◽  
Frank Y. Cheng
Keyword(s):  
Real Time ◽  
Current Density ◽  
Steel Surface ◽  
Steel Corrosion ◽  
Buried Pipelines ◽  
Total Potential ◽  
Ac Current ◽  
Potential Alternative ◽  
Current Densities ◽  
Ac Interference

In this work, a real-time AC/DC signal data acquisition (DAQ) technique was developed, which is capable of separating the DC and AC potential components from the recorded total potential, providing mechanistic information about the steel corrosion in the presence of AC interference. It was found that the corrosion of the steel is enhanced by the applied AC current density from 0 to 400 A/m2. With the further increase to 600 A/m2 and 800 A/m2, the corrosion rate of the steel decreases, which is attributed to passivation of the steel at sufficiently high AC current densities, and a compact film is formed on the steel surface. Moreover, the derived mathematic relationships between AC potential and AC current density provides a potential alternative to determine AC current density on pipelines based on measurements of AC potential in the field.

Using Computer Software to Simulate AC Interference and Mitigation Measures of Buried Pipelines

ICPTT 2012 ◽  
2012 ◽  
Author(s):  
Jun Zhao ◽  
Guangji Shen ◽  
Xudong Yin ◽  
Zhenhua Chen ◽  
Zhiyuan Xue ◽  
...  
Keyword(s):  
Computer Software ◽  
Mitigation Measures ◽  
Buried Pipelines ◽  
Ac Interference
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