Corrosion Reliability Assessment Method of Solid Hydrogen Storage Materials Based on Simulation Model
The work aims to model and evaluate the corrosion reliability of coating-containing metal hydride hydrogen storage structures to support the reliability design and preventive maintenance of solid-state hydrogen storage structures.A multi-physics simulation model of corrosion failure was established by analyzing the physicochemical process of corrosion of coating-containing metal hydride substrate structures and the affecting factors were analyzed.Based on the data generated by the simulation model,the deliquescent property degradation of the coating-containing metal hydride structure was discretized into several states,and a Markov model of multi-state degradation was established for corrosion reliability assessment.The results of the significance analysis of the effects of coating porosity,coating thickness,relative humidity,and ambient temperature on the corrosion reliability of solid-state hydrogen storage structures were obtained,and the corrosion reliability of organic coat-ing-containing hydride structures was evaluated at different temperature,humidity,and parameter of the protective materials by the proposed method.The change of coating porosity has the most critical effect on the corrosion reliability of solid-state hy-drogen storage materials,and the corrosion reliability assessment method of solid-state hydrogen storage materials established based on the failure physical model and multi-state reliability theory in this work can realize the assessment of long-term corro-sion reliability of hydrogen storage materials,and it has good applicability to the corrosion reliability of metal hydrides,etc.
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