EDDY CURRENT MONITORING OF SURFACE ROUGHNESS

The surface conditions of a steel plate specimen have been examined with an eddy current technique. Previous examinations have shown promise in using white light interferometer to measure the surface roughness and thus the corrosion of the specimen. Additional nondestructive evaluation (NDE) ultrasonic testing was utilized. The goal of this study is to examine the feasibility of using eddy current to monitor the surface roughness. The apparent surface roughness based on the eddy current data is in close agreement with a white light interferometer.