A Disposable Soft Magnetic Ribbon Based Sensor for Corrosion Monitoring

TL;DR

This paper introduces a low-cost, disposable magnetic ribbon sensor that uses RF impedance to monitor chemical corrosion in real-time, showing linear responses to acid concentration for potential industrial and environmental applications.

Contribution

The study demonstrates a novel, simple, and low-cost disposable sensor based on soft magnetic ribbons for real-time corrosion monitoring using RF impedance measurements.

Findings

Impedance increases linearly with acid concentration.

Measurement time decreases linearly with acid concentration.

Sensor is quick, low power, and suitable for industrial use.

Abstract

We present a new approach for real-time monitoring of chemical corrosion based on the radio-frequency (RF) impedance technology and soft ferromagnetic ribbons. The impedance (Z) of a commercial magnetic ribbon was measured in real time for 5 mul of drop-casted HNO3 of various concentrations. Variations in the concentration of the drop-casted acid were assessed by considering the difference in Z with and without the acid treatment. We found a large and linear increase in deltaZ and a large linear decrease in measurement time with the acid concentration, which are ideal for developing disposable chemical sensors for strength estimation of corrosive chemicals and for monitoring of a time-dependent chemical corrosion process. Since the ribbon used is commercially available at low cost and the measurement system is quick and low power consuming, the proposed sensor can be used as an easy, quick, and low-cost chemical probe in industries and environmental hazard management purposes.