6533b7d5fe1ef96bd1263abf

RESEARCH PRODUCT

Corrosion behaviour of galvanized steel studied by electrochemical microprobes applied on low-angle cross sections

Nicolas GeoffroySara M. ManhaboscoVincent VignalTaíse Matte ManhaboscoLuis Frederico Pinheiro Dick

subject

Materials science020209 energyGeneral Chemical EngineeringZinciteCombined use02 engineering and technologyGeneral ChemistrySubstrate (electronics)engineering.material021001 nanoscience & nanotechnologyElectrochemistryGalvanizationCorrosionsymbols.namesakeCoatingvisual_art0202 electrical engineering electronic engineering information engineeringengineeringvisual_art.visual_art_mediumsymbolsGeneral Materials ScienceHydrozinciteComposite material0210 nano-technology

description

Abstract The combined use of the microcapillary cell (MEC) and scanning vibrating electrode technique (SVET) and low-angle cross sections was employed to elucidate the role of each coating region on the protection of the cut-edge corrosion of galvanized steels. Different compounds are involved in the blocking action of the corrosion products: Zincite (ZnO) on the steel substrate, hydrozincite (Zn5(OH)6(CO3)2) at the coating/steel interface, and Simonkolleite (Zn5(OH)8Cl2) and ZnO on the different coating regions in different proportions. The coating surface is also active at the initial stage and during long-term protection and thus, must be considered in experimental simulation of the cut-edge corrosion.

yearjournalcountryeditionlanguage
2018-08-01Corrosion Science
https://doi.org/10.1016/j.corsci.2018.05.026