In-situ measurement of corrosion in buried pipelines using vertically measured pipe-to-soil potential

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专利权人:

SOUTHWEST RESEARCH INSTITUTE

发明人:

Shukla Pavan K.,Dasgupta Biswajit

申请号：

US201414161165

公开号：

US10001436(B2)

申请日:

2014.01.22

申请国别(地区):

美国

年份:

2018

代理人:

Livingston Law Firm

摘要：

A method for in-situ measuring the corrosion rate of a corroding site on an underground metal structure buried in soil, the structure being under cathodic protection. The structure-to-soil potential at varying depths above the pipeline is measured to a depth above, but not reaching the structure. These measurements are extrapolated to obtain data representing the structure-to-soil potential at the surface of the structure under the probe. The gradient of the electrical potential at this surface is used to calculate the corrosion rate of the defect. A special probe may be used to obtain the potential measurement data.

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