Thermography

Thermography is a measure of the infrared radiation a material system emits. The underlying principal is that a good mechanical bond between materials is also a good thermal bond. It may be used to detect corrosion, debonding, cracking, thinning, water absorption, among other defects. Thermography is not widely used due to its cost and limitation to surface defect detection. A comparison between various nondestructive inspection techniques is given in Table 63.