Work

A novel approach for estimating hydrogen uptake and diffusion coefficient

Year: 2025

Type: article

Abstract: Hydrogen diffusional parameters in metallic alloys were evaluated for API 5L-grade X65 steel by introducing a simplified approach using a single-compartment electrochemical cell. The experimental hydrogen flow from electrochemically pre-charged specimens is interpolated through a numerical approach, with a simulated target curve derived for a specific geometry. The diffusion coefficient and concentration of diffusible hydrogen were estimated after hydrogen charging in alkaline solutions at different levels of cathodic polarisation. The results show constant and reproducible values of diffusivity despite the level of polarisation, and the concentration of diffusible hydrogen increases with cathodic overpotential, depending on the composition of the solution. • Mono-electrochemical cell is used to determine hydrogen diffusional parameters. • Data-driven optimisation of hydrogen 3D-flow on electrochemically charged specimens. • Diffusion coefficient and hydrogen concentration estimated after alkaline charging. • Constant, reproducible apparent diffusion coefficients of hydrogen were obtained. • Hydrogen concentration increases with cathodic overpotential, based on solution.

Source: International Journal of Hydrogen Energy

DOI: 10.1016/j.ijhydene.2025.02.400

Authors: Luca Gritti, Denny Coffetti, Marina Cabrini, Tommaso Pastore

Institution: University of Bergamo

Language: English

Topic: Hydrogen embrittlement and corrosion behaviors in metals

Subfield: Metals and Alloys

Field: Materials Science

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,730