SwRI Unveils Innovative Corrosion Detection Probe for Storage Tanks

Southwest Research Institute (SwRI) has developed a magnetostrictive transducer (MST) probe designed to detect corrosion in storage tanks. This technology utilizes ultrasonic guided waves, allowing for inspections without the need to empty and manually check tanks. The probe attaches externally to storage tanks, offering a more cost-effective and efficient method for corrosion detection compared to traditional techniques.

The MST 8x8: How It Works

The SwRI MST 8x8 consists of a flexible strip featuring eight ultrasonic sensors. These sensors generate acoustic waves that travel along a structure. Anomalies such as corrosion and other flaws are identified when these waves reflect back to the sensor. The probe specifically employs shear horizontal guided waves, which are valued for their sensitivity and precision in defect detection.

Reducing Downtime and Enhancing Safety

Dr. Sergey Vinogradov of SwRI stated that regular tank inspections are a requirement for many industries, and traditional methods involve significant expense due to the need for emptying, cleaning, and manual inspection.

The SwRI probe aims to reduce expensive downtime and enhance inspection safety by eliminating the need for work in hazardous, confined spaces.

Broad Applications and Enhanced Accuracy

Field testing of the probe was conducted on a series of storage tanks. The technology is also applicable to other structures such as ship hulls, wind turbines, rocket bodies, and pipelines. The eight-sensor array allows for data collection from multiple angles, which contributes to increased accuracy. This setup facilitates full matrix capture, enabling the system to generate detailed 2D maps of the tanks.

High-Resolution Mapping for Precise Damage Assessment

An advanced imaging algorithm, known as the total focusing method, processes the data from the probe to create these maps. This allows the system to provide high-resolution maps of structures, indicating areas with potential corrosion, rather than just signaling an anomaly. This information can assist users in assessing damage extent and scheduling necessary repairs. The probe is also compatible with complex geometries, including curved surfaces and attachments, which can pose challenges for traditional inspection methods.

Industry-Wide Impact and Availability

The inspection technique is suitable for various industries, including oil and gas, aerospace, manufacturing, shipping, and municipal utilities. SwRI plans to make this technology available through equipment sales, licensing, and technology transfer to inspection companies. The study detailing the probe's efficacy, "Screening of Corrosion in Storage Tank Walls and Bottoms Using an Array of Guided Wave Magnetostrictive Transducers," was published in MDPI Sensors.