Subsurface Corrosion Detection in Industrial Steel Structures
Title
Subsurface Corrosion Detection in Industrial Steel Structures
Subject
Corrosion
corrosion under insulation
Eddy current testing
eddy-current inspection
Electromagnetics
Oil insulation
pipe-wall thickness integrity evaluation
Pipelines
Description
Corrosion is a central problem for the oil and gas and nuclear industries, affecting pipelines and nuclear waste storage tanks. Reliable methods for timely corrosion detection and integrity evaluation are needed for a range of industrial structures where corrosion under insulation manifests as wall loss. Commercially available detection systems cannot be used in harsh nuclear-storage environments. Moreover, these systems are not reliable for detecting the inner wall thickness of industrial structures made of multiple layers of material, including insulation layers. A novel nondestructive testing method based on low-frequency eddy-current induction was developed and tested on a multilayered steel structure, including an insulating gap. The method enables through-wall thickness measurements between 4 and 16 mm, with a measurement error of 1 mm. The technique is quantitative, nondestructive, and allows the sensor coil to be positioned on the outside of the composite steel structure, which is useful when the interior of an industrial container or pipeline is not accessible.
1-5
10
Creator
R. Guilizzoni
G. Finch
S. Harmon
Publisher
IEEE Magnetics Letters
Date
2019
Type
journalArticle
Identifier
1949-3088
Collection
Citation
R. Guilizzoni, G. Finch, and S. Harmon, “Subsurface Corrosion Detection in Industrial Steel Structures,” Lamar University Midstream Center Research, accessed May 13, 2024, https://lumc.omeka.net/items/show/27484.