Investigation of High pH Corrosion under Alternating Current Interference

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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Investigation of High pH Corrosion under Alternating Current Interference. / Olesen, Andreas; Nielsen, Lars; Møller, Per.

In: Corrosion, Vol. 75, No. 7, 2019, p. 982-989.

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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@article{8bdf7c19a08b49bc9056ef42db088926,
title = "Investigation of High pH Corrosion under Alternating Current Interference",
abstract = "This paper investigates the possible alternating current (AC) corrosion mechanism as dihypoferrite dissolution at high pH under an alternating voltage perturbation and compares polarization behavior of three commonly used pipeline steels, X52, X65, and X70. The methods used are polarization scans at various interference levels, weight-loss coupons, and ER-probe corrosion rate measurements. It is found that AC enhances the stability region of dihypoferrite in the Pourbaix diagram, leading to corrosive conditions for all investigated steels, but that within the investigated steel types, the alloy is of less importance. A mechanistic model for AC corrosion that considers a soluble ion and the role of hydrogen evolution is presented.",
author = "Andreas Olesen and Lars Nielsen and Per M{\o}ller",
year = "2019",
doi = "10.5006/3119",
language = "English",
volume = "75",
pages = "982--989",
journal = "Corrosion",
issn = "0010-9312",
publisher = "N A C E International",
number = "7",

}

RIS

TY - JOUR

T1 - Investigation of High pH Corrosion under Alternating Current Interference

AU - Olesen, Andreas

AU - Nielsen, Lars

AU - Møller, Per

PY - 2019

Y1 - 2019

N2 - This paper investigates the possible alternating current (AC) corrosion mechanism as dihypoferrite dissolution at high pH under an alternating voltage perturbation and compares polarization behavior of three commonly used pipeline steels, X52, X65, and X70. The methods used are polarization scans at various interference levels, weight-loss coupons, and ER-probe corrosion rate measurements. It is found that AC enhances the stability region of dihypoferrite in the Pourbaix diagram, leading to corrosive conditions for all investigated steels, but that within the investigated steel types, the alloy is of less importance. A mechanistic model for AC corrosion that considers a soluble ion and the role of hydrogen evolution is presented.

AB - This paper investigates the possible alternating current (AC) corrosion mechanism as dihypoferrite dissolution at high pH under an alternating voltage perturbation and compares polarization behavior of three commonly used pipeline steels, X52, X65, and X70. The methods used are polarization scans at various interference levels, weight-loss coupons, and ER-probe corrosion rate measurements. It is found that AC enhances the stability region of dihypoferrite in the Pourbaix diagram, leading to corrosive conditions for all investigated steels, but that within the investigated steel types, the alloy is of less importance. A mechanistic model for AC corrosion that considers a soluble ion and the role of hydrogen evolution is presented.

U2 - 10.5006/3119

DO - 10.5006/3119

M3 - Journal article

VL - 75

SP - 982

EP - 989

JO - Corrosion

JF - Corrosion

SN - 0010-9312

IS - 7

ER -