Eddy Current, is similar to Magnetic Particle Testing, only using an electrical field which gives a reading on a screen. This technique can be used through paint and on both ferrous and non-ferrous material. The advantage is that little or no surface preparation is required.

As the display is remote it can be used for internal examinations such as threaded holes and pipe work subject to using a suitable probe. Painting / Coating Inspection This is a discipline to ensure that paint or coatings meet the specification required and they have been applied correctly and under the right conditions. Things to take into consideration would be pre-coating surface preparation (profile), temperature which moisture will condense out on the surface (dew Point), variation in coating thickness (Holidays).