Yuan Li | Fengshan Du | Junkai Fan | Shiguang Huang | Binbin Hu
OPEN ACCESS
With medium carbon steel as the research object, this paper explores the regularities of hydrogen diffusion by electrochemical hydriding, establishes a macro-micro hydrogen diffusion simulation model, and obtains the regularities of hydrogen concentration distribution at different initial hydrogen concentrations and different hydriding times. Based on the test results, the authors get reasonable values of parameters that are difficult to measure, such as the initial concentration coefficient α. To disclose the formation mechanism of hydrogen-induced blisters, this paper analyzes the regularities of hydrogen concentration, diffusion and condensation in hydrogen traps from the micro perspective. The macro-micro hydrogen diffusion simulation model offers a simulation method to similar electrochemical experiments, helps predict hydrogen diffusion and condensation in cases that are difficult to measure, and provides clues to prevent “hydrogen embrittlement”.
Electrochemical hydriding, hydrogen diffusion model, hydrogen-induced blisters, hydrogen pressure
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