In this work, a novel method for the determination of instantaneous corrosion rates icorr is proposed. It relies on recording the current response in the time domain upon imposing an AC voltage signal, and a computational procedure to remove non-faradaic currents and to analyse the data. The method was applied to steel in stirred, unstirred, and sand-filled 1 M KCl; the resulting icorr compared well with different conventional techniques. The proposed method is robust, non-destructive and fast. In addition to icorr, it provides also an estimate of the capacitance and Tafel slopes (thus, no assumption on constant B is required).

Measuring corrosion rates: a novel AC method based on processing and analysing signals recorded in the time domain

ELSENER, BERNHARD
2014-01-01

Abstract

In this work, a novel method for the determination of instantaneous corrosion rates icorr is proposed. It relies on recording the current response in the time domain upon imposing an AC voltage signal, and a computational procedure to remove non-faradaic currents and to analyse the data. The method was applied to steel in stirred, unstirred, and sand-filled 1 M KCl; the resulting icorr compared well with different conventional techniques. The proposed method is robust, non-destructive and fast. In addition to icorr, it provides also an estimate of the capacitance and Tafel slopes (thus, no assumption on constant B is required).
2014
Carbon Steel, Electrochemical impedance, Polarization
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/58169
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