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History
of Eddy Current Testing
 Eddy
current testing has its origins with Michael Faraday's discovery
of electromagnetic
induction in 1831. Faraday was a chemist in England
during the early 1800's and is credited with the discovery of
electromagnetic induction, electromagnetic rotations, the magneto-optical
effect, diamagnetism, and other phenomena. In 1879, another
scientist named Hughes recorded changes in the properties of a
coil when placed in contact with metals of different conductivity
and permeability.
However, it was not until the Second World War that these effects
were put to practical use for testing materials. Much work was
done in the 1950's and 60's, particularly in the aircraft and
nuclear industries. Eddy current testing is now a widely used
and well-understood inspection technique.
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