6533b7d4fe1ef96bd1261da0

RESEARCH PRODUCT

Investigation of self-healing mechanism on galvanized steels cut edges by coupling SVET and numerical modeling

B. VuilleminRoland OltraKevin OgleF. ThebaultChristian Allely

subject

Materials scienceGeneral Chemical EngineeringMetallurgyOxidechemistry.chemical_elementZincGalvanizationAnodeCathodic protectionchemistry.chemical_compoundsymbols.namesakechemistrySelf-healingElectrochemistrysymbolsCoupling (piping)Composite materialCurrent (fluid)

description

Local cathodic inhibition has been observed on the cut-edge of galvanized steel immersed in 0.03 M NaCl solution using the scanning vibrating electrode technique. The current distribution results indicate that cathodic inhibition occurs in a limited spatial zone located between the cathodic sites on the steel and the anodic sites on the exposed zinc surface. The experimental current distributions are compared with the results of numerical simulations that show the specific diagnostic features for the detection of cathodic inhibition from scanning vibrating electrode technique (SVET) data so as to distinguish the zero current regions from experimental artifacts due to the lateral resolution of the technique. The inhibition is attributed to the formation of a zinc-based oxide film at the steel surface controlled by an increase of the interfacial pH.

yearjournalcountryeditionlanguage
2008-06-01Electrochimica Acta
https://doi.org/10.1016/j.electacta.2008.02.066