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Investigation of pitting corrosion monitoring using field signature method

Lookup NU author(s): Professor Gui Yun TianORCiD


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The field signature method (FSM) is a nondestructive testing (NDT) method based on the potential drop (PD) technique and has been applied to online metal pipe corrosion monitoring for nearly three decades. The many advantages and benefits of the method have been reported in a number of studies, but few have reported on its limitations or shortcomings. However, the detection accuracy for pitting corrosion in FSM is very low. In this paper, the reasons for the low pitting corrosion detection accuracy of FSM were analyzed and it was found that different corrosion pits, which have different sizes, depths or positions, generally have differing influences on the potentials of nearby electrode pairs. Therefore, a new method using a subdivided resistor network to assess pitting corrosion is proposed and verified. When compared with the traditional method, the most important parameter, namely the pitting corrosion depth detection accuracy, can be significantly improved. (C) 2016 Elsevier Ltd. All rights reserved.

Publication metadata

Author(s): Gan FJ, Tian GY, Wan ZJ, Liao JB, Li WQ

Publication type: Article

Publication status: Published

Journal: Measurement

Year: 2016

Volume: 82

Pages: 46-54

Print publication date: 01/03/2016

Online publication date: 02/01/2016

Acceptance date: 28/12/2015

ISSN (print): 0263-2241

ISSN (electronic): 1873-412X

Publisher: Elsevier


DOI: 10.1016/j.measurement.2015.12.040


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Funder referenceFunder name
51435011National Natural Science Foundation of China
61271329National Natural Science Foundation of China