In situ monitoring of the localized corrosion of 304 stainless steel in FeCl 3 solution using a joint electrochemical noise and scanning reference electrode technique

In Situ Monitoring of Pitting Corrosion on Stainless Steel with Digital Holographic Surface Imaging

“…Pit growth may be terminated at any time, in which case the pit surface repassivates. 1,5,26,33 Meanwhile, a pit can initially be created anywhere on the electrode surface even at or near the location of re-passivated a death pit, and finally, certain pits may grow up to be stable. 14,35 To examine the holographic system further, more applied potentials (0.10 V and 0.30 V vs. SCE) have been polarized the sample and the differences provoked by the potentials have been visually exhibited by the phase maps.…”

“…Localized corrosion has received considerable attention in the literature, since it is a primary factor leading to the failure of metallic materials. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] In recent years, increasing numbers of techniques and data processing methods have been explored to investigate the pitting corrosion mechanism, ranging from electrochemicalbased techniques, such as electrochemical impedance spectroscopy (EIS), [2][3][4] electrochemical noise (EN) 4,5 and scanning electrochemical microscopy (SECM), [6][7][8] to various imaging and sensing techniques, such as transmission electron microscopy (TEM), 9,10 atomic force microscopy (AFM), 11 X-ray photoelectron spectroscopy (XPS), 12 X-ray tomography, 13,14 acoustic-emission (AE), 15 3-D measuring microscope, 16 and radiofrequency sensing method. 17 These studies allow for more insights into localized corrosion processes.…”

Integrated Scanning Electrochemical Probes Assisted by ECSTM for In Situ Imaging of the Pitting Corrosion Process of Carbon Steel in SCCP Solutions

“…The home-built integrated system of scanning electrochemical probes combined with SMRE-ECSTM techniques ,,, was used to in situ image the surface topography and local corrosion activity concurrently in both ECSTM and SMRE modes by a Pt–Ir-coated scanning probe with an extremely sharp tip. The detailed principle of measurement and the procedure for probe preparation were described in previous publications. − A schematic diagram of the home-built integrated SMRE-ECSTM measurement system is shown in Figure , which is made up of the SMRE and ECSTM units controlled by a computer system. It should be noticed that the local corrosion activity was expressed as the potential difference between the scanning probe and the reference electrode (RE fixed ), which was present more than 2 mm away from the sample surface during the scanning process.…”

“…Procedure. The home-built integrated system of scanning electrochemical probes combined with SMRE-ECSTM techniques 9,12,25,26 was used to in situ image the surface topography and local corrosion activity concurrently in both ECSTM and SMRE modes by a Pt−Ir-coated scanning probe with an extremely sharp tip. The detailed principle of measurement and the procedure for probe preparation were described in previous publications.…”

The reassigned pseudo Wigner–Ville transform in electrochemical noise analysis

“…This type of potentiostat was successfully used before for EN analysis by other research groups. 25,26,30,[48][49][50] The sampling frequency used for all the measurements was varied from 1 Hz to 10 Hz with a 10 Hz low-pass filter. In order to validate the EN measurement system, EN measurements with dummy cells have been performed at 3 sampling frequencies to control the overlap of the PSDs in common frequency ranges.…”