What types of defects can be detected with Eddy Current Testing?

Eddy Current Testing is particularly effective at detecting various types of defects in conductive materials, including both surface and subsurface anomalies. The correct choice highlights that Eddy Current Testing can identify defects such as corrosion and changes in material thickness, which are critical for assessing the structural integrity of components.

Corrosion can significantly weaken materials, making it crucial to detect early before it leads to failure. Eddy Current Testing works by inducing electrical currents within the conductor, and variations in these currents can signify variations in material properties, such as the presence of corrosion or changes in thickness. This capability makes it a valuable technique in preventive maintenance, helping to ensure safety and reliability in various applications, particularly in aerospace and power generation.

The other choices reflect limitations in what Eddy Current Testing can effectively detect. While surface cracks can be detected, they are not the sole capability of this method, making the first option too narrow. The third option focuses solely on internal structural issues, which are not the primary strength of Eddy Current Testing as it is most effective for near-surface examinations. The last option regarding temperature variations is also outside the typical function of Eddy Current Testing, which primarily assesses material integrity rather than thermal measurements.