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If someone is doing Eddy-current Testing on a weld near a large and powerful magnet, in contact with the part near the weld, will this have any effect on Eddy-current analysis?

If it does effect the Eddy-current analysis, can it just be ignored, taken into account and adjusted for, or removed automatically using whatever software is helping to perform the analysis.

Also, does it make a different if the magnetic field of the magnet (an Electromagnet for instance) is changing over time.

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    \$\begingroup\$ I'm not going to post this as an answer, but from your reference: "Variations in the electrical conductivity and magnetic permeability of the test object". A strong-enough magnet will saturate a steel part, and change the effective permeability. It probably won't make much difference to a non-magnetic part. It may change how the probe responds (if the probe has a ferrous core that can, itself, saturate). I would test things myself: do the eddy current testing with & without the magnet present, and see if there's a difference. \$\endgroup\$ – TimWescott Feb 21 at 1:51

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