19 June 1995 Detection of corrosion in pipe using the magnetostrictive sensor technique
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A technique for inspecting steel pipes or tubes using magnetostrictive sensors (MsSs) is described. Signals acquired from approximately 6.6-m-long, 164-mm-diameter, 5-mm-wall steel pipes before and after inducing a simulated corrosion defect are given. The data show that the MsS technique is very sensitive to corrosion-type defects and can be used for 100% volumetric inspection of a long segment of piping from a single sensor location. Also, the ability to operate the sensor with a substantial gap to the outside surface of pipe makes the MsS technique suitable for inspection of piping under thermal insulation or lagging.
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Hegeon Kwun, Hegeon Kwun, John J. Hanley, John J. Hanley, A. E. Holt, A. E. Holt, } "Detection of corrosion in pipe using the magnetostrictive sensor technique", Proc. SPIE 2459, Nondestructive Evaluation of Aging Maritime Applications, (19 June 1995); doi: 10.1117/12.212549; https://doi.org/10.1117/12.212549

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