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Cathodic Protection
 
Monitoring External Corrosion with Cathodic Protection

With more data, the Owl UT
is the wisest of all test
stations.

To understand what makes the BSI Owl UT Test Station (patent pending) so unique, it is helpful to briefly take a look at the purpose of test stations and cathodic protection in general.

The concept of Cathodic Protection (CP) is not new. It is a technique that is used to control the corrosion of a metal surface by making the metal surface the cathode of a dissimilar “sacrificial” metal, also known as the anode. Electrons from the different types of metal travel from anode to cathode and, in the process, combine with oxygen and water. Different combinations of the electrons, water, oxygen and the steel cathode cause corrosion.

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What Makes the Owl UT So Wise?

Quickly and easily installed, the Owl UT Test Station consists of two corrosion coupon probes, each monitored with three ultrasound transducers. The corrosion coupon probe is located inside the circuit and the native corrosion coupon probe is buried close to the circuit. Readings are taken directly at the probe with the BSI data logger.

Ultrasonic corrosion probes record and monitor corrosion rates (if any) for cathodically-protected structures. The native corrosion coupon will experience wall loss over time that the structure would ordinarily have experienced without cathodic protection. The Owl UT Test Station is a unique and effective tool for monitoring the impact of AC-induced corrosion on underground structures.

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Where Can I Use OWL UT Test Stations?

Test Stations are commonly placed at strategic locations, based on customer requirements, to protect a wide range of metallic structures in various environments. Some common locations include:

Under high-voltage power lines.
Pipelines located in highly resistant soil, such as sand
In buried piping inside plants.

BSI recognizes that there are very specific, serious safety issues involved when a pipeline is located near high-voltage power lines. In these situations, the pipeline can receive AC power from the high-voltage lines and that power can build up on the pipeline, creating corrosion spots in the metal. This AC-induced corrosion can be a significant issue resulting not only in corrosion, but also potentially in unsafe voltage buildups.

In cases such as this, BSI has the expertise to help you develop an AC Mitigation Plan to minimize the induced voltage on your system. Mitigation plans are specialized in design, installation, and monitoring capabilities, depending on the specifics of your location. If you need assistance with creating an AC Mitigation Plan, contact us to get started on a solution.

The Ultrasound Difference

Historically, ultrasonic instruments have been used to evaluate the integrity of components manually. In many circumstances, the accuracy of these measurements is operator dependent.  In addition to being somewhat inconsistent and unreliable, manual assessment can be disruptive to operations, is time intensive, and costly. A more proven and predictive approach is to use the precision of ultrasound technology in a more automated fashion, eliminating variables that may impact measurement accuracy.

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Why BSI?

BSI excels in translating the precision and reliability of ultrasound, previously only found in a laboratory setting, into real-world field environments.

Our engineers and scientists are experts in the development of unique, rugged ultrasound sensors and “Smart” probes as well as the design of signal processing software that enhances and preserves data quality.

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