Characterisation of Steel Corrosion Using High Frequency RFID

摘要

The progression characterisation of exposed atmospheric corrosion on metal substrates is a major problem in the field of corrosion science and Non-destructive Evaluation (NDE). High frequency radio frequency identification (HF RFID) sensors are attractive in diverse applications where sensor performance is needed at a low cost and dimension restriction. An approach adapting commercial passive 13.56MHz RFID tags for sensing corrosion stage has been developed. The investigation includes balance of sensing and positioning of RFID sensors for corrosion detection by analysing real part and imaginary part of the complex impedance. With passive RFID sensors, real part and imaginary part of complex impedance are extracted from the reader coil with Vector network analyser (VNA) and delivering a unique capability for corrosion sensing with different atmospheric exposure time steel samples (1 month, 6 months, 10 months and 12 months). The relationship between these features and corrosion exposed time has been derived which is useful for corrosion progression measurement, early stage corrosion monitoring and prediction in industrial fields such as the marine industry.