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Corrosion Monitoring

29 January 2025

Internal corrosion monitoring of coated piping

The client needed to acquire monthly thickness measurements on pipework at an Oil& Gas terminal in Malaysia to monitor internal erosion caused by sand erosion. They also needed the same pipework to be protected against external corrosion with a permanent corrosion prevention coating. The solution outlined in this case study was a combination of the Inductosense WAND system and STOPAQ WrappingBand system.

Challenge

The application of a permanent coating in a very humid, hot and wet environment presented multiple challenges to conventional inspection methods.

The Inductosense WAND system and STOPAQ WrappingBand system were combined to provide effective thickness monitoring under a permanent coating system. The permanent nature of our PIB-based STOPAQ coating required the thickness monitoring technology to be ultra low-profile, embeddable and wireless without impacting the coating protection performance. The sensors are less than 1mm thick and wireless and battery-free. WAND TM sensors were selected for their ultra-low profile, repeatable and accurate thickness measurements and low-cost.

Multiple WAND thickness monitoring (TM) sensors were installed on the pipework to measure wall thickness. Due to the reduced surface preparation requirement (St2, wire brush) the coating could be applied quickly over the WAND TM sensors without having to surface blast or remove the existing coating.

STOPAQ WrappingBand and high temperature polypropylene (HTPP) Mechanical Protection Outerwrap (4) were applied over the WAND TM sensor.

The WAND handheld data collector (WAND-HDC) was used to activate and wirelessly collect the ultrasonic signal from the installed WAND TM sensors through the STOPAQ coating.

By implementing the WAND solution under STOPAQ WrappingBand the client was able to digitalise the collection and analysis of data by utilising the iDART cloud-based software. The software enables multiple users to access the uploaded data, view thickness trending (on a time-thickness (x-y) plot) and corrosion rate, simply from a web browser login. The easy access to data provided more informed decisions to scheduling future maintenance and inspection.

Read more about Corrosion Monitoring on the website of Inductosense

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Protecting the future 

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