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TWI Presents on Corrosion Under Insulation at Seminar


Fri, 13 March, 2020

Dr Shiva Majidnia CEng, Principal Project Leader, presented a talk on corrosion under insulation (CUI) entitled Corrosion Detection Technologies: Current and Upcoming.

The presentation began with an overview of current corrosion detection technologies including ultrasonic testing, guided wave testing, magnetic flux leakage and thermography, as well as their advantages and disadvantages, before moving onto emerging corrosion detection technologies.

Some of the emerging technologies discussed were electromagnetic acoustic transducers (EMATs) and pulsed eddy current (PEC) methods, cutting-edge technologies that TWI are currently researching and developing.

CUI presents unique challenges, as prediction of where and when CUI will occur is limited, with insulation masking the detection of corrosion before failure, resulting in major problems for a wide range of industries.

As a result, TWI is at the proposal stage of a joint industry project (JIP) that aims to establish impartial validation of the most commonly used commercial equipment, determine the influence of varying inspection parameters upon the effectiveness of a PEC inspection and establish confidence levels for the use of PEC data in fitness for service (FFS) and risk based inspection (RBI) and a best practice guide for the use of PEC in inspecting and sizing CUI.

Shiva closed her talk with an overview of the JIP proposal and associated research areas, which TWI hope to launch into a confirmed project soon.

Shiva presenting on corrosion detection technologies.
Shiva presenting on corrosion detection technologies.

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