Analysis of the technical feasibility of the use of PEC inspection in the detection of thickness loss in boiler tubesa

PEC inspection is a multifrequency technique for eddy currents that measures the variation in electromagnetic field caused by induced electrical metal, correlating obtained signal with desired property variation. The speed of execution test and ease interpreting signals are advantageous characteristics this technique, which allows evaluation thickness loss boiler tubes thus increases operational reliability these systems. Pulsed current tests were performed on specimens taken from boilers had localized due to corrosion under deposit specimen machined depressions simulated loss. To assess effectiveness pulsed identifying corroded regions, measurements using an ultrasonic measuring device. This research work demonstrated that, qualitatively, all regions values below pre-established limit identified, concluding can be used equipment components