Local Measurements in Electrochemistry and Corrosion Technology

Spatial Imaging of Cu2+‐Ion Release by Combining Alternating Current and Underpotential Stripping Mode Scanning Electrochemical Microscopy

“…In order to identify possible corrosion sites, spatially resolved characterization of the local activity of the metal surface is needed. Several techniques such as local electrochemical impedance spectroscopy (LEIS) [7], scanning reference (SRET) and scanning vibrating electrode techniques (SVET) [8], scanning Kelvin probe (SKP) [9], scanning droplet cell [10,11], and scanning electrochemical microscopy (SECM) [12,13] were used for imaging local surface properties with high lateral resolution. Previously, SECM was successfully applied for simultaneous initiation and visualization of corrosion pits [14,15].…”

Novel Electrochemical Techniques in Corrosion Research

“…covered by thin electrolyte layers. Thus it is not surprising that this method quickly found widespread application throughout the corrosion science community (Chen etal., 1998a, b;de Wit et al, 1998;Schmutz and Frankel, 1998 a, b;Nazarov and Thierry, 1998;Boehmisch et al, 1997;Han and Mansfeld, 1997;Atanasoski et al, 1994;Yamashita et al, 1995, Huang et al, 1991. Future research will also concentrate on the use of the Kelvinprobe in the investigation of the corrosion of electronic materials, on homogeneous materials as well as on materials that are separated from each other by a dielectric but are still part of circuit boards and therefore being polarized by large voltage differences.…”

SVET study of the corrosion protection of electrodeposited Zn and Zn‐Co‐Fe alloy coated steels

“…The SVET is a local electrochemical technique that enables an in situ measurement of current density close to the surface of a sample under investigation immersed in the electrolyte [6,7]. Current density maps determined by the SVET overcome some of the aforementioned drawbacks of ex situ analysis.…”

“…Current density maps determined by the SVET overcome some of the aforementioned drawbacks of ex situ analysis. It offers a method of observing the onset and progress of corrosion directly [6][7][8][9][10][11][12]. Being an in situ technique, mapping of current density can be used to locate spatially distributed corrosion sites and to quantify its progress as it grows or re-passivates.…”

“…SVET is also contrasted with the extensive periods required by and the uncertainties that remain with ex situ methods in determining how these events take place. In the recent past, the technique is extensively used for the in situ investigation of localized corrosion at defects in painted zinc and Zn-Al, Zn-Fe alloys [6,[9][10][11][12][13][14] and also in relation to organic coatings [15][16][17][18][19].…”