Alkali and alkaline earth metals cation effects on the formation of akageneite in corrosion products of steel artifacts embedded in soil: a study under simulated laboratory conditions

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Achal Pandya, Jitendra Kumar Singh, Hyun-Min Yang, D. D. N. Singh
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Abstract

X-ray diffraction (XRD), electrochemical tests, scanning electron microscopy and energy-dispersive X-ray analysis (SEM-EDXA) techniques were used to study the kinetics and growth of akageneite in corrosion products of steel exposed in moist soil added with chloride salts of sodium, potassium calcium, magnesium, and barium. The cations significantly affected the kinetics of corrosion and nucleation and growth of the akageneite. Divalent cations catalyze the corrosion and akageneite formation. The volume fraction of akageneite determined by XRD for monovalent cations (Na+ and K+) is observed in the range of 10–12% and that for divalent is in the range of 16–19%. This increase in akageneite leads to a decrease in the charge transfer resistance (Rct) for monovalent (Na+) and divalent cations (Ca++ and Mg++) (0.9 kΩ·cm2 and 0.4 kΩ·cm2, respectively). The mechanism of acceleration of corrosion by akageneite is discussed in light of disruption effects of added cations on electrical double layer formed at the steel-moist soil interface.

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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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