The effect of carbon within corrosion pits of iron in chloride solutions

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The effect of carbon within corrosion pits of iron in chloride solutions. / Xu, Weichen; Rayment, Trevor; Davenport, Alison.

In: Corrosion Engineering Science and Technology, Vol. 52, No. 5, 04.07.2017, p. 383-390.

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@article{af8688c6c39f462c8d7f55784c9d6c4d,
title = "The effect of carbon within corrosion pits of iron in chloride solutions",
abstract = "Iron artificial pits have been used in this work to investigate the effect of a carbon-based black layer that can form within a pit during iron dissolution in HCl solutions. Commercial purity iron (99.5%) and high purity iron (99.99+%) have been compared, and a black layer has been observed only in the 99.5% iron pit. It has been found that the formation of a black layer within an iron artificial pit is potential dependent: it can form at applied voltages below 0.2 V(SCE), but not at 0.6 V(SCE). The presence of a black layer can decrease the rate of mass transport inside a pit, which may help to maintain the aggressive acidic solution in an active pit. This effect has been characterised quantitatively via potentiostatic and potential step methods. In addition, the black layer has also been found to induce a small extra resistance in the solution.",
keywords = "artificial pit, carbon, Iron, solid corrosion product",
author = "Weichen Xu and Trevor Rayment and Alison Davenport",
year = "2017",
month = jul,
day = "4",
doi = "10.1080/1478422X.2017.1304618",
language = "English",
volume = "52",
pages = "383--390",
journal = "Corrosion Engineering Science and Technology",
issn = "1478-422X",
publisher = "Maney Publishing",
number = "5",

}

RIS

TY - JOUR

T1 - The effect of carbon within corrosion pits of iron in chloride solutions

AU - Xu, Weichen

AU - Rayment, Trevor

AU - Davenport, Alison

PY - 2017/7/4

Y1 - 2017/7/4

N2 - Iron artificial pits have been used in this work to investigate the effect of a carbon-based black layer that can form within a pit during iron dissolution in HCl solutions. Commercial purity iron (99.5%) and high purity iron (99.99+%) have been compared, and a black layer has been observed only in the 99.5% iron pit. It has been found that the formation of a black layer within an iron artificial pit is potential dependent: it can form at applied voltages below 0.2 V(SCE), but not at 0.6 V(SCE). The presence of a black layer can decrease the rate of mass transport inside a pit, which may help to maintain the aggressive acidic solution in an active pit. This effect has been characterised quantitatively via potentiostatic and potential step methods. In addition, the black layer has also been found to induce a small extra resistance in the solution.

AB - Iron artificial pits have been used in this work to investigate the effect of a carbon-based black layer that can form within a pit during iron dissolution in HCl solutions. Commercial purity iron (99.5%) and high purity iron (99.99+%) have been compared, and a black layer has been observed only in the 99.5% iron pit. It has been found that the formation of a black layer within an iron artificial pit is potential dependent: it can form at applied voltages below 0.2 V(SCE), but not at 0.6 V(SCE). The presence of a black layer can decrease the rate of mass transport inside a pit, which may help to maintain the aggressive acidic solution in an active pit. This effect has been characterised quantitatively via potentiostatic and potential step methods. In addition, the black layer has also been found to induce a small extra resistance in the solution.

KW - artificial pit

KW - carbon

KW - Iron

KW - solid corrosion product

UR - http://www.scopus.com/inward/record.url?scp=85015893656&partnerID=8YFLogxK

U2 - 10.1080/1478422X.2017.1304618

DO - 10.1080/1478422X.2017.1304618

M3 - Article

AN - SCOPUS:85015893656

VL - 52

SP - 383

EP - 390

JO - Corrosion Engineering Science and Technology

JF - Corrosion Engineering Science and Technology

SN - 1478-422X

IS - 5

ER -