Residual magnetic fields reduce pit depth

Jose Hiram Espina-Hernandez; Victoria Venegas; Francisco Caleyo; Alma Valor; Jose Manuel Hallen

Residual magnetic fields reduce pit depth

Jose Hiram Espina-Hernandez, Victoria Venegas, Francisco Caleyo, Alma Valor, Jose Manuel Hallen

Research output: Contribution to specialist publication › Article

Abstract

The influence of the magnetic field on pitting corrosion in pipeline steel has been studied on samples of APU 5L Grade 52 steel. The samples underwent pitting immediately after magnetization by immersion in a solution with dissolved Cl^- and SO^-₄ ions for 7 days. Investigation showed the magnetic field confined within the pipeline wall influencing the pitting corrosion process. Finite element simulations demonstrated the role of the leaked magnetic field in pit depth reduction caused by the forced movement of paramagnetic species toward zones of higher magnetic gradients. The soil properties having greatest influence on pit growth are soil pH, Cl^- content and SO^-₄ content. The maximum and mean values of pit depth in magnetized coupons are smaller than the values for the control coupons. The results suggest that following pit initiation, the magnetic flux leakage within and near nucleated pits reduces their growth.

Original language	English
Pages	122-128
Number of pages	7
Volume	109
No	13
Specialist publication	Oil and Gas Journal
State	Published - 6 Jun 2011

Cite this

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title = "Residual magnetic fields reduce pit depth",

abstract = "The influence of the magnetic field on pitting corrosion in pipeline steel has been studied on samples of APU 5L Grade 52 steel. The samples underwent pitting immediately after magnetization by immersion in a solution with dissolved Cl- and SO-4 ions for 7 days. Investigation showed the magnetic field confined within the pipeline wall influencing the pitting corrosion process. Finite element simulations demonstrated the role of the leaked magnetic field in pit depth reduction caused by the forced movement of paramagnetic species toward zones of higher magnetic gradients. The soil properties having greatest influence on pit growth are soil pH, Cl- content and SO-4 content. The maximum and mean values of pit depth in magnetized coupons are smaller than the values for the control coupons. The results suggest that following pit initiation, the magnetic flux leakage within and near nucleated pits reduces their growth.",

author = "Espina-Hernandez, {Jose Hiram} and Victoria Venegas and Francisco Caleyo and Alma Valor and Hallen, {Jose Manuel}",

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T1 - Residual magnetic fields reduce pit depth

AU - Espina-Hernandez, Jose Hiram

AU - Venegas, Victoria

AU - Caleyo, Francisco

AU - Valor, Alma

AU - Hallen, Jose Manuel

PY - 2011/6/6

Y1 - 2011/6/6

N2 - The influence of the magnetic field on pitting corrosion in pipeline steel has been studied on samples of APU 5L Grade 52 steel. The samples underwent pitting immediately after magnetization by immersion in a solution with dissolved Cl- and SO-4 ions for 7 days. Investigation showed the magnetic field confined within the pipeline wall influencing the pitting corrosion process. Finite element simulations demonstrated the role of the leaked magnetic field in pit depth reduction caused by the forced movement of paramagnetic species toward zones of higher magnetic gradients. The soil properties having greatest influence on pit growth are soil pH, Cl- content and SO-4 content. The maximum and mean values of pit depth in magnetized coupons are smaller than the values for the control coupons. The results suggest that following pit initiation, the magnetic flux leakage within and near nucleated pits reduces their growth.

AB - The influence of the magnetic field on pitting corrosion in pipeline steel has been studied on samples of APU 5L Grade 52 steel. The samples underwent pitting immediately after magnetization by immersion in a solution with dissolved Cl- and SO-4 ions for 7 days. Investigation showed the magnetic field confined within the pipeline wall influencing the pitting corrosion process. Finite element simulations demonstrated the role of the leaked magnetic field in pit depth reduction caused by the forced movement of paramagnetic species toward zones of higher magnetic gradients. The soil properties having greatest influence on pit growth are soil pH, Cl- content and SO-4 content. The maximum and mean values of pit depth in magnetized coupons are smaller than the values for the control coupons. The results suggest that following pit initiation, the magnetic flux leakage within and near nucleated pits reduces their growth.

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M3 - Artículo

AN - SCOPUS:79958126219

SN - 0030-1388

VL - 109

SP - 122

EP - 128

JO - Oil and Gas Journal

JF - Oil and Gas Journal

ER -

Residual magnetic fields reduce pit depth

Abstract

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