TY - JOUR AU - Sánchez-Amaya, J. M. AU - Bethencourt, M. AU - Gonzalez-Rovira, L. AU - Botana, F. J. PY - 2009/04/30 Y2 - 2024/03/28 TI - Measurement of electrochemical noise for the study of corrosion processes of metallic alloys JF - Revista de Metalurgia JA - Rev. metal. VL - 45 IS - 2 SE - Reviews DO - 10.3989/revmetalm.0807 UR - https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/158 SP - 142-156 AB - Electrochemical noise (EN) is a technique that allows the estimation of both the rate and the corrosion mechanism of different metallic alloys by means of the measurement and the analysis of the fluctuations of current and voltage. Its main advantage against other electrochemical techniques is that during the measurement process, the corrosive systems under study are not instrumentally disturbed, and therefore, the systems are kept at their natural corrosion potential. Two steps are necessary to use this technique: measurement and analysis of the EN signals. In this paper, the most important concepts related only to the measurement of EN are revised. The parameters most employed in the literature to analyse the EN signals will be described in another paper. In the present article, the experimental devices normally used to measure EN signals are firstly analysed. Subsequently, the most important properties of the EN signals are studied. Finally, the external sources of instrumental noise that can affect to the EN signals are described. ER -