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Corrosion monitoring of metals through magnetic sensing

Popovics, John S. / Gallo, Gonzalo E. / Chapman, Patrick L.

Corrosion is the irreversible consumption of materials due to the interaction with the environment. Corrosion is a severe problem, not only due to material loss and costs, but also because it is a principal cause in some cases of injury and loss of life. In the US, some estimates of the cost of corrosion damage to highway bridges alone are 6 to 10 billion dollars per year. Given its importance, there is a clear need to monitor and characterize corrosion. Many techniques already exist to monitor corrosion, ranging from direct mass loss to characterization of kinetics and thermodynamics involved. There is however always a need to increase the sensitivity and practicality of the sensing techniques. A magnetic sensing approach is described to overcome some of the difficulties faced by traditional NDE techniques. This new approach explores the use of Giant Magneto-Resistive (GMR) technology to determine both rate and extent of corrosion. Active and passive configurations are used for remote monitoring. Results on corroding metal samples are presented and future developments for this technology are described.

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Corrosion monitoring of metals through magnetic sensing

Popovics, John S. / Gallo, Gonzalo E. / Chapman, Patrick L.

Corrosion is the irreversible consumption of materials due to the interaction with the environment. Corrosion is a severe problem, not only due to material loss and costs, but also because it is a principal cause in some cases of injury and loss of life. In the US, some estimates of the cost of corrosion damage to highway bridges alone are 6 to 10 billion dollars per year. Given its importance, there is a clear need to monitor and characterize corrosion. Many techniques already exist to monitor corrosion, ranging from direct mass loss to characterization of kinetics and thermodynamics involved. There is however always a need to increase the sensitivity and practicality of the sensing techniques. A magnetic sensing approach is described to overcome some of the difficulties faced by traditional NDE techniques. This new approach explores the use of Giant Magneto-Resistive (GMR) technology to determine both rate and extent of corrosion. Active and passive configurations are used for remote monitoring. Results on corroding metal samples are presented and future developments for this technology are described.

Corrosion monitoring of metals through magnetic sensing

Popovics, John S. / Gallo, Gonzalo E. / Chapman, Patrick L.

Corrosion is the irreversible consumption of materials due to the interaction with the environment. Corrosion is a severe problem, not only due to material loss and costs, but also because it is a principal cause in some cases of injury and loss of life. In the US, some estimates of the cost of corrosion damage to highway bridges alone are 6 to 10 billion dollars per year. Given its importance, there is a clear need to monitor and characterize corrosion. Many techniques already exist to monitor corrosion, ranging from direct mass loss to characterization of kinetics and thermodynamics involved. There is however always a need to increase the sensitivity and practicality of the sensing techniques. A magnetic sensing approach is described to overcome some of the difficulties faced by traditional NDE techniques. This new approach explores the use of Giant Magneto-Resistive (GMR) technology to determine both rate and extent of corrosion. Active and passive configurations are used for remote monitoring. Results on corroding metal samples are presented and future developments for this technology are described.

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Title:

Corrosion monitoring of metals through magnetic sensing

Additional title:

Korrrosionsüberwachung von Metallen durch magnetische Sensorik

Contributors:

Popovics, John S. (author) / Gallo, Gonzalo E. (author) / Chapman, Patrick L. (author)

Published in:

NDTCE '09, NDTCE, Nondestructive Testing in Civil Engineering, International Symposium, 7 ; 1-6

Publication date:

2009

Size:

6 Seiten, 4 Bilder, 14 Quellen

Remarks:

(nicht paginiert)

Type of media:

Conference paper

Type of material:

Storage medium

Language:

English

Keywords:

zerstörungsfreie Prüfung , magnetischer Sensor , magnetische Prüfung , Riesenmagnetowiderstand , Stahlbeton , Korrosionsüberwachung

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