Use of Coupled Multi-Electrode Arrays to Advance the Understanding of Selected Corrosion Phenomena

Abstract

The use of multi-coupled electrode arrays in various corrosion applications is discussed with the main goal of advancing the understanding of various corrosion phenomena. Both close packed and far spaced electrode configurations are discussed. Far spaced electrode arrays are optimized for high throughput experiments capable of elucidating the effects of various variables on corrosion properties. For instance the effects of a statistical distribution of flaws on corrosion properties can be examined. Close packed arrays enable unprecedented spatial and temporal information on the behavior of local anodes and cathodes. Interactions between corrosion sites can trigger or inhibit corrosion phenomena and affect corrosion damage evolution.

Pitting Corrosion of Metals

“…38 It is fundamental to Galvele's model, and necessary for clarity, that there is a clear-cut boundary condition at the mouth of the pit. Yet authors who discuss phenomena involving electrolyte flow, and/or effects of enrichment or depletion of ions outside the pit, including communication between nearby pits, [39][40][41] find Galvele's basic framework useful, and indeed indispensable for their analysis.…”

Heterogeneous electrochemical characteristics of biofilm/metal interface and local electrochemical techniques used for this purpose

“…The key advantage of WBE is the ability to induce electrochemical processes on specific regions of the WBE, while monitoring their effect on the remainder of the electrode elements [38]. Furthermore, the surface area of each wire in the WBE is much smaller than the total working electrode area; thus corrosion and electrochemical processes on each wire surface are assumed to be uniform.…”

Estudio mediante AFM de la corrosión de aceros en disoluciones de fase acuosa del hormigón

“…Así, en los últimos años, en estructuras de hormigón armado, se ha propuesto el empleo de redes de fibra óptica para evaluar la corrosión (6), el empleo de técnicas de electromagnetismo (7) y emisión acústica (8) para evaluar el estado de aceros bajo tensión, o la fotoelasticidad para analizar la formación de grietas (9). En el caso de disoluciones que simulan la existente en los poros de hormigón, se ha propuesto la espectroscopía Raman in situ en aceros con un 9% de cromo (10), o el empleo de multielectrodos para evaluar la distribución de la corrosión en aceros al carbono o inoxidables (11).…”

“…In the case of solutions simulating that in concrete pores, in situ Raman spectroscopy has been proposed for steels containing 9% Cr (10). Multielectrodes have also been proposed to evaluate corrosion in carbon steels or stainless steels (11).…”