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Tunnel-magnetoresistive-based pulsed Eddy current probe for inspection of corrosion under insulation

Mohamed, Hussein Mohamed and Sophian, Ali and Sulaiman, Nadzril and Adesta, Erry Yulian Triblas (2022) Tunnel-magnetoresistive-based pulsed Eddy current probe for inspection of corrosion under insulation. In: 5th International Conference on Mechanical, Automotive and Aerospace Engineering (ICMAAE 2021) 21/06/2021 - 23/06/2021, 21-23 June 2021, Kuala Lumpur, Malaysia.

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The problem of corrosion in the industrial oil and gas pipes has been one of the major contributors in catastrophic structural failures. Among the various types of corrosion, corrosion under insulation (CUI) has been known to cause serious problems. Pulsed eddy current (PEC) non-destructive testing has shown its effectiveness in detecting hidden CUI. Most PEC systems have been developed by using an inductive coil as their sensing device, while some use a magnetic sensor which potentially offers better resolution. A new probe design based on a solidstate Tunnel magnetoresistance (TMR) is presented. TMR sensors offer higher sensitivities compared to other commercially available sensors. The performance of the probe is evaluated by using ferromagnetic mild steel plates that have thicknesses in the range of 8mm to 12mm at different stand-offs with a thin aluminium sheet under the probe. The different thicknesses represent different corrosion levels, while the stand-offs and thin aluminium sheet are to mimic the insulation of different thicknesses and the cladding in the real pipeline structure. The results show an overall mean absolute error (MAE) of 0.19 mm, which is better than our existing Halldevice-based PEC probe

Item Type: Conference or Workshop Item (Plenary Papers)
Subjects: T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User: Dr Ali Sophian
Date Deposited: 29 Jul 2022 11:32
Last Modified: 15 Sep 2022 09:07
URI: http://irep.iium.edu.my/id/eprint/98967

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