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An Improved Magnetic Technique For The Non-Destructive Detection Of Faults In Embedded Steel Reinforcement

Published online by Cambridge University Press:  01 February 2011

Peter W. Haycock ,
Simon D. Brown ,
Nicholas Tomlinson  and
Matthew J. Hocking
Peter W. Haycock
Affiliation:
Birchall Centre for Inorganic Chemistry and Materials Science, School of Chemistry and Physics, Lennard-Jones Laboratories, Keele University, Staffordshire, ST5 5BG, UK. Magnon Inspection, Science Park 1, Keele University, Staffordshire, ST5 5SP, UK.
Simon D. Brown
Affiliation:
XmaS, ESRF, Oliver Lodge Laboratory, University of Liverpool, Oxford Street, Liverpool, L69 72E, UK. Magnon Inspection, Science Park 1, Keele University, Staffordshire, ST5 5SP, UK.
Nicholas Tomlinson
Affiliation:
Birchall Centre for Inorganic Chemistry and Materials Science, School of Chemistry and Physics, Lennard-Jones Laboratories, Keele University, Staffordshire, ST5 5BG, UK.
Matthew J. Hocking
Affiliation:
Magnon Inspection, Science Park 1, Keele University, Staffordshire, ST5 5SP, UK.
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Abstract

There are many situations in which steel reinforcement within structural materials is vulnerable to corrosion. In some cases the result of such deterioration of the structural integrity can have significant safety implications. However, there is currently little by way of reliable non-destructive means of obtaining direct evaluation of the state of the embedded steel, which yields anything more than rudimentary information. This paper considers the possibilities of making use of the vectorial nature of the magnetization of steel to improve the qualitative and quantitative evaluation of the integrity of embedded steel reinforcement in vehicle tyres. Results are presented which show that enhanced non-destructive mapping of faults within tyres can be achieved by this means.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 630: Symposium GG – When Materials Matter Analyzing, Predicting, and Preventing Disasters , 2000 , GG4.4
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

1. Bergge, Westfalische, Instrument for testing wire ropes, more especially used in underground mining, for instance hoisting cables, Patent nos. GB 1542933, DE 2521552 (1979).Google Scholar
2. Swanepoel, L.P. (Anglo American Corporation of South Africa Limited), Magnetic sensor for detecting breaks in a steel rope including multiplier for eliminating noise, Patent no. US 3714558 (1973).Google Scholar
3. AMF Incorporated, Method and apparatus for identifying hardspots in magnetizable material, Patent no. GB 1258435 (1971).Google Scholar
4. Bradfield, J.E., Jaynes, M.S. and Kahil, J.E. (PA Incorporated), Measuring defects in ferromagnetic tubing during removal of tubing from the well using tubing trip tool head, Patent nos. US 4492115, GB 2157439, DE 3445770, NL 8403794, NO 8405293, CA 1222287 (1985).Google Scholar
5. Flohrer, C. and Hillimeier, B. (Hochtief Vorm Gebr Helfmann AG), Detecting position of breakage point in reinforcing steel concrete – applying magnetising magnetostatic and/or quasi-magnetostatic field, removing field and evaluating field of remanent magnetisation, Patent no. DE 4037993 (1997).Google Scholar
6. Hochtief Vorm Gebr Hefmann AG, Detecting position of breakage point in reinforcing steel concrete – applying magnetising field followed by demagnetising field and then measuring relevant magnetisation field, Patent no. DE 4037992 (1997).Google Scholar
7. Baccaud, A. and Baudrit, D. (Pneu Laurent), Process and device for magnetically checking worn tyres, Patent no. US 5559437 (1996).Google Scholar