In order to obtain time-dependent quantities (noise impedance, noise resistance, average charge of a corrosion event, average frequency of corrosion events), the original dataset is segmented in shorter consecutive and partially overlapping datasets. The calculation of the relevant quantities is the performed iteratively using the potential and current segment as input data. In practice, at the first iteration, a segment of a number of points defined by the parameter length of FFT is extracted and used for the calculation, as described below. The results of the calculations are assigned to the time corresponding to the time of the first point of the extracted segment.The time position of the first point of the segment being extracted is represented graphically by the moving points in the screen Time Record.

Figure 1.0 Segmentation of the Original Data Set

Figure 2.0 The Calculations are performed iteratively using potential and current segments