Investigation of the calcareous deposits formation controlled by interfacial pH and its effect on the hydrogen entry into AISI 4135 steel in seawater

Yong Xu; Yanliang Huang; Dan Yang; Hans-Jorg Kunte; Roland De Marco; Xiutong Wang

doi:10.1016/j.ijhydene.2020.11.040

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Investigation of the calcareous deposits formation controlled by interfacial pH and its effect on the hydrogen entry into AISI 4135 steel in seawater

Journal article

Peer reviewed

Investigation of the calcareous deposits formation controlled by interfacial pH and its effect on the hydrogen entry into AISI 4135 steel in seawater

Yong Xu, Yanliang Huang, Dan Yang, Hans-Jorg Kunte, Roland De Marco and Xiutong Wang

International Journal of Hydrogen Energy, Vol.46(7), pp.5824-5841

2021

DOI: https://doi.org/10.1016/j.ijhydene.2020.11.040

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Abstract

Low alloy steel

Cathodic protection

Calcareous deposits

Hydrogen permeation

Interfacial pH

The influence of interfacial pH between AISI 4135 steel and seawater under different polarization potentials on the formation of calcareous deposits has been studied. An interfacial pH of 9.61 at −0.9 V vs. SCE using state of the art iridium oxide microelectrode was found to be the critical pH for the precipitation of magnesium hydroxide. Calcareous deposits with a double-layer structure comprising an inner-brucite layer and an outer-aragonite layer were found to form at potentials between −1.0 V and −1.2 V vs. SCE. Furthermore, the facilitation of hydrogen permeation into steel induced by the formation of calcareous deposits was verified using the Devanathan-Stachurski electrochemical test. The mechanism of calcareous deposits facilitates hydrogen permeation into steel is related to its inhibition on hydrogen recombination and escape processes.

Details

Title: Investigation of the calcareous deposits formation controlled by interfacial pH and its effect on the hydrogen entry into AISI 4135 steel in seawater
Authors: Yong Xu (Author) - Chinese Academy of Sciences
Yanliang Huang (Author) - Chinese Academy of Sciences
Dan Yang (Author) - Chinese Academy of Sciences
Hans-Jorg Kunte (Author) - Federal Institute For Materials Research and Testing
Roland De Marco (Author) - University of the Sunshine Coast, Queensland, Office of the Deputy Vice-Chancellor (Research and Innovation)
Xiutong Wang (Author) - Chinese Academy of Sciences
Publication details: International Journal of Hydrogen Energy, Vol.46(7), pp.5824-5841
Publisher: Elsevier Ltd
DOI: 10.1016/j.ijhydene.2020.11.040
ISSN: 1879-3487
Organisation Unit: Office of the Deputy Vice-Chancellor (Research and Innovation); University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99489207302621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Physical; Electrochemistry; Energy & Fuels

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