Corrosion Rate Measurement and Oxide Investigation of AC Corrosion at Varying AC/DC Current Densities

Andreas Junker Olesen; Knud Dideriksen; Lars Vendelbo Nielsen; Per Møller

doi:10.5006/3168

Corrosion Rate Measurement and Oxide Investigation of AC Corrosion at Varying AC/DC Current Densities

Andreas Junker Olesen, Knud Dideriksen, Lars Vendelbo Nielsen^*, Per Møller

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Corrosion of pipelines under cathodic protection (CP) caused by induced alternating current (AC) is highly dependent on the cathodic current density. This study uses electrical resistance probes to produce a corrosion rate map of the AC/DC current density domain, using a galvanostatic CP system subject to varying AC voltage interference levels. Two corrosion domains are recognized at high or low CP, respectively. X-ray photoelectron spectroscopy is utilized for analysis of surface oxides, being primarily magnetite and ferrous hydroxide. The results are discussed in a Pourbaix diagram context.

Original language	English
Journal	Corrosion
Volume	75
Issue number	9
Pages (from-to)	1026-1033
ISSN	0010-9312
DOIs	https://doi.org/10.5006/3168
Publication status	Published - 2019

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title = "Corrosion Rate Measurement and Oxide Investigation of AC Corrosion at Varying AC/DC Current Densities",

abstract = " Corrosion of pipelines under cathodic protection (CP) caused by induced alternating current (AC) is highly dependent on the cathodic current density. This study uses electrical resistance probes to produce a corrosion rate map of the AC/DC current density domain, using a galvanostatic CP system subject to varying AC voltage interference levels. Two corrosion domains are recognized at high or low CP, respectively. X-ray photoelectron spectroscopy is utilized for analysis of surface oxides, being primarily magnetite and ferrous hydroxide. The results are discussed in a Pourbaix diagram context.",

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T1 - Corrosion Rate Measurement and Oxide Investigation of AC Corrosion at Varying AC/DC Current Densities

AU - Olesen, Andreas Junker

AU - Dideriksen, Knud

AU - Nielsen, Lars Vendelbo

AU - Møller, Per

PY - 2019

Y1 - 2019

N2 - Corrosion of pipelines under cathodic protection (CP) caused by induced alternating current (AC) is highly dependent on the cathodic current density. This study uses electrical resistance probes to produce a corrosion rate map of the AC/DC current density domain, using a galvanostatic CP system subject to varying AC voltage interference levels. Two corrosion domains are recognized at high or low CP, respectively. X-ray photoelectron spectroscopy is utilized for analysis of surface oxides, being primarily magnetite and ferrous hydroxide. The results are discussed in a Pourbaix diagram context.

AB - Corrosion of pipelines under cathodic protection (CP) caused by induced alternating current (AC) is highly dependent on the cathodic current density. This study uses electrical resistance probes to produce a corrosion rate map of the AC/DC current density domain, using a galvanostatic CP system subject to varying AC voltage interference levels. Two corrosion domains are recognized at high or low CP, respectively. X-ray photoelectron spectroscopy is utilized for analysis of surface oxides, being primarily magnetite and ferrous hydroxide. The results are discussed in a Pourbaix diagram context.

U2 - 10.5006/3168

DO - 10.5006/3168

M3 - Journal article

SN - 0010-9312

VL - 75

SP - 1026

EP - 1033

JO - Corrosion

JF - Corrosion

IS - 9

ER -

Corrosion Rate Measurement and Oxide Investigation of AC Corrosion at Varying AC/DC Current Densities

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