Kelvin Microprobe Analytics on Iron-Enriched Corroded Magnesium Surface
authors Yasakau, KA; Hoche, D; Lamaka, SL; Ferreira, MGS; Zheludkevich, ML
nationality International
journal CORROSION
author keywords atomic force microscopy; commercial purity magnesium; high purity magnesium; iron re-deposition; magnesium corrosion mechanism; scanning Kelvin probe force microscopy; Volta potential difference
keywords PROBE FORCE MICROSCOPY; ANODIC HYDROGEN EVOLUTION; CORROSION BEHAVIOR; LOCALIZED CORROSION; ALLOYS; METAL; FILM; MG; INHIBITION; POTENTIALS
abstract This work contributes to the better understanding of Kelvin microprobe response to iron re-deposition related surface morphology changes resulting from Mg corrosion caused by iron-rich impurities. Scanning Kelvin probe force microscopy (SKPFM) was performed on polished Mg samples at well-defined surface conditions occurring from corrosive exposure to 0.05 M NaCl electrolyte or dissolved FeCl2. Volta potential difference was measured and mapped across iron-rich areas, unaffected areas of alpha-Mg, and on FeCl2 exposed areas. Afterward, the obtained potential values were evaluated via the derived mathematical expression, based on model assumptions. Subsequently, they were compared and then correlated to the corrosion process. The article demonstrates what kind of information can be obtained by SKPFM and what conclusion can be drawn toward the detailed explanation of recently reported iron re-deposition mechanism on corroding Mg surface. Finally, suggestions toward the improved application of SKPFM for Mg corrosion are made.
publisher NATL ASSOC CORROSION ENG
issn Oct-12
isbn 1938-159X
year published 2017
volume 73
issue 5
beginning page 583
ending page 595
digital object identifier (doi) 10.5006/2260
web of science category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000403210800001
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  impact metrics
journal impact factor (jcr 2016): 1.661
5 year journal impact factor (jcr 2016): 1.544
category normalized journal impact factor percentile (jcr 2016): 60.448
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