Corrosion Parameters by Electrochemical Noise Analysis (ECN)

Electrochemical Noise Analysis (ECN) measures the raw current and potential fluctuations of the system using a low noise reference electrode set up or zero resistance ammeter (ZRA). The data is interpreted via visual spikes or FFT transformation to obtain a power density spectrum. This yields important parameters for dedicated applications in corrosion research world. All Metrohm potentiostats can be used for a basic ECN study but our ECN module provides low potential resolutions down to 0.76 µV.

Application: Low conductivity electrolytes, pit initiation studies and crevice propagation

Application Note: Automated Sample Handling and Analysis with NOVA: High-Throughput Electrochemistry (Download)

Recommended Configuration: (PGSTAT 302N + ECN Module) – ECN Analyzer

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cpt2

Unique Software Features for ECN Analysis

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  • Protocol for power density plots
  • Automated ECN spectrum analysis
  • Built-in calculation of statistical indicators:
    • Skewness and kurtosis for current
    • Noise resistance
    • Pitting index