A focused review of the hydrogen storage tank embrittlement mechanism process

Paul C. Okonkwo*, El Manaa Barhoumi, Ikram Ben Belgacem, Ibrahim B. Mansir, Mansur Aliyu, Wilfred Emori, Paul C. Uzoma, Wesam H. Beitelmal, Ersin Akyüz, Ahmed Bahgat Radwan, R. A. Shakoor

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

18 Scopus citations


Hydrogen embrittlement is a widely known phenomenon in high-strength and storage materials. Hydrogen embrittlement is responsible for subcritical crack growth in material, fracture initiation, subsequent loss in mechanical properties, and catastrophic failure. Hydrogen is induced in the material during an electrochemical reaction between the hydrogen, storage materials, and high-pressure gaseous hydrogen environment. Various mechanisms which are responsible for crack development, growth, and fracture have been deliberated and reported. However, the fundamental mechanism of hydrogen embrittlement remains unclear. Several techniques such as linearly increasing stress test techniques (LIST), constant extension rate test (CERT) and slow strain rate testing (SSRT), thermal desorption spectroscopy (TDS), permeation testing (PT), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) have been utilized to determine the amount of hydrogen diffused and available in the hydrogen storage material. The review intends to categorize and provide a clear understanding of the degradation mechanism that occurs during hydrogen embrittlement. The improvement in mitigating the hydrogen embrittlement degradation as a function of modifying the structure and surfaces of the material is established. Prospects for addressing hydrogen embrittlement degradation through further experimental and numerical research are suggested. Lastly, this paper through recommendation endeavors to prevent hydrogen storage tank degradation and reduces high costs associated with the replacement of the component in renewable energy applications.

Original languageEnglish
Pages (from-to)12935-12948
Number of pages14
JournalInternational Journal of Hydrogen Energy
Issue number35
StatePublished - 26 Apr 2023

Bibliographical note

Funding Information:
This study is supported via funding from Prince Sattam bin Abdulaziz University project number ( PSAU/2023/R/1444 ).

Publisher Copyright:
© 2022 Hydrogen Energy Publications LLC


  • Degradation
  • Hydrogen diffusion
  • Hydrogen embrittlement
  • Materials
  • Storage tank

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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