A thin layer cell adapted for corrosion studies in confined aqueous environments

In order to investigate the influence of the confinement on the corrosion behaviour of metallic materials, an innovative thin layer electrochemical cell was developed. The cell includes a device which allows a continuous gas supply within the electrolyte film covering the metallic specimen under study. A procedure based on high frequency impedance measurements is also proposed to control and precisely adjust the setting of the electrolyte film geometry. The experimental set-up was validated by performing measurements of the stationary limiting cathodic current on a steel disk immersed in a K 2SO 4 aerated solution for various electrolyte layer thicknesses. The results obtained demonstrate the reliability of the experimental method.