Limitations
- Not recommended for short sections or small items.
- Locations of weld repairs and localised grinding can cause spurious indications.
- Crack length needs to be longer than 5 mm. Multiple defects reduce the ability to estimate defect depth.
- Equipment more bulky than for MT and indications may be more difficult to interpret.
The probability of detection and false detection rate is generally good, but it is application dependent.
Read more about this topic: Alternating Current Field Measurement
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