Hydrogen Evolution and Absorption in an API X100 Line Pipe Steel Exposed to Near-Neutral pH Solutions

Hung M. Ha; Ibrahim M. Gadala; Akram Alfantazi

doi:10.1016/j.electacta.2016.03.167

Hydrogen Evolution and Absorption in an API X100 Line Pipe Steel Exposed to Near-Neutral pH Solutions

Hung M. Ha
, Ibrahim M. Gadala
, Akram Alfantazi

Chemical and Petroleum Engineering

The University of British Columbia

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Hydrogen evolution kinetics and hydrogen absorption in an API X100 line pipe steel exposed to near-neutral pH solutions is studied in this work. At the corrosion potential, dissolved CO₂ in the solution accelerates the hydrogen evolution kinetics through the carbonic acid discharge reaction. At potentials more negative than the corrosion potential, hydrogen evolution due to bicarbonate discharge dominates the other cathodic reactions occurring at the ocp. The hydrogen diffusivity in the API X100 steel is found to be approximately 4.4 × 10^-7 cm²/s. A measurable amount of diffusible hydrogen of approximately 1 appm is detected in the steel at the freely corroding condition using an electrochemical hydrogen permeation technique. Higher concentration of diffusible hydrogen is observed at more negative applied potentials as well as at higher CO₂ partial pressures. The results in this paper support the attribution of stress corrosion cracking of pipelines in near-neutral pH trapped water environments to hydrogen embrittlement.

Original language	British English
Pages (from-to)	18-30
Number of pages	13
Journal	Electrochimica Acta
Volume	204
DOIs	https://doi.org/10.1016/j.electacta.2016.03.167
State	Published - 20 Jun 2016

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

hydrogen embrittlement
hydrogen evolution
hydrogen permeation
line pipe steel
stress corrosion cracking

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10.1016/j.electacta.2016.03.167

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title = "Hydrogen Evolution and Absorption in an API X100 Line Pipe Steel Exposed to Near-Neutral pH Solutions",

abstract = "Hydrogen evolution kinetics and hydrogen absorption in an API X100 line pipe steel exposed to near-neutral pH solutions is studied in this work. At the corrosion potential, dissolved CO2 in the solution accelerates the hydrogen evolution kinetics through the carbonic acid discharge reaction. At potentials more negative than the corrosion potential, hydrogen evolution due to bicarbonate discharge dominates the other cathodic reactions occurring at the ocp. The hydrogen diffusivity in the API X100 steel is found to be approximately 4.4 × 10-7 cm2/s. A measurable amount of diffusible hydrogen of approximately 1 appm is detected in the steel at the freely corroding condition using an electrochemical hydrogen permeation technique. Higher concentration of diffusible hydrogen is observed at more negative applied potentials as well as at higher CO2 partial pressures. The results in this paper support the attribution of stress corrosion cracking of pipelines in near-neutral pH trapped water environments to hydrogen embrittlement.",

keywords = "hydrogen embrittlement, hydrogen evolution, hydrogen permeation, line pipe steel, stress corrosion cracking",

author = "Ha, \{Hung M.\} and Gadala, \{Ibrahim M.\} and Akram Alfantazi",

note = "Funding Information: This publication was made possible by NPRP grant \# 6-027-2-010 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd. All rights reserved.",

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doi = "10.1016/j.electacta.2016.03.167",

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AU - Ha, Hung M.

AU - Gadala, Ibrahim M.

AU - Alfantazi, Akram

N1 - Funding Information: This publication was made possible by NPRP grant # 6-027-2-010 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. Publisher Copyright: © 2016 Elsevier Ltd. All rights reserved.

PY - 2016/6/20

Y1 - 2016/6/20

N2 - Hydrogen evolution kinetics and hydrogen absorption in an API X100 line pipe steel exposed to near-neutral pH solutions is studied in this work. At the corrosion potential, dissolved CO2 in the solution accelerates the hydrogen evolution kinetics through the carbonic acid discharge reaction. At potentials more negative than the corrosion potential, hydrogen evolution due to bicarbonate discharge dominates the other cathodic reactions occurring at the ocp. The hydrogen diffusivity in the API X100 steel is found to be approximately 4.4 × 10-7 cm2/s. A measurable amount of diffusible hydrogen of approximately 1 appm is detected in the steel at the freely corroding condition using an electrochemical hydrogen permeation technique. Higher concentration of diffusible hydrogen is observed at more negative applied potentials as well as at higher CO2 partial pressures. The results in this paper support the attribution of stress corrosion cracking of pipelines in near-neutral pH trapped water environments to hydrogen embrittlement.

AB - Hydrogen evolution kinetics and hydrogen absorption in an API X100 line pipe steel exposed to near-neutral pH solutions is studied in this work. At the corrosion potential, dissolved CO2 in the solution accelerates the hydrogen evolution kinetics through the carbonic acid discharge reaction. At potentials more negative than the corrosion potential, hydrogen evolution due to bicarbonate discharge dominates the other cathodic reactions occurring at the ocp. The hydrogen diffusivity in the API X100 steel is found to be approximately 4.4 × 10-7 cm2/s. A measurable amount of diffusible hydrogen of approximately 1 appm is detected in the steel at the freely corroding condition using an electrochemical hydrogen permeation technique. Higher concentration of diffusible hydrogen is observed at more negative applied potentials as well as at higher CO2 partial pressures. The results in this paper support the attribution of stress corrosion cracking of pipelines in near-neutral pH trapped water environments to hydrogen embrittlement.

KW - hydrogen embrittlement

KW - hydrogen evolution

KW - hydrogen permeation

KW - line pipe steel

KW - stress corrosion cracking

UR - https://www.scopus.com/pages/publications/84963811299

U2 - 10.1016/j.electacta.2016.03.167

DO - 10.1016/j.electacta.2016.03.167

M3 - Article

AN - SCOPUS:84963811299

SN - 0013-4686

VL - 204

SP - 18

EP - 30

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Hydrogen Evolution and Absorption in an API X100 Line Pipe Steel Exposed to Near-Neutral pH Solutions

Abstract

UN SDGs

Keywords

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