Peridynamic modeling of crack propagation driven by hydrogen embrittlement

Performance Evaluation of an Anode-Supported SOFC Short-Stack Operating with Different Fuel Blends as Stationary-CHP System

“…The cheapest and z E-mail: francescomarino005@studenti.uniparthenope.it quickest solution would be using (and, in case, retrofitting) the existent gas grid to transport hydrogen even across different countries. 13 Given the different physical and chemical characteristics of hydrogen compared to the natural gas, with the current gas grid this condition is all but guaranteed: the high permeability of the hydrogen molecule makes it prone to diffuse into the metallic lattice, 14 causing embrittlement and pipeline corrosion. 15 Embrittlement is the permeation of the molecules through the steel structure, whose consequences are loss in material ductility and strength, as well as material failure; the fracture toughness of the metal can be reduced to one tenth of its original value.…”

“…15 Embrittlement is the permeation of the molecules through the steel structure, whose consequences are loss in material ductility and strength, as well as material failure; the fracture toughness of the metal can be reduced to one tenth of its original value. 14 Corrosion is electrochemical material deterioration, 16 a phenomenon exacerbated by the presence of impurities such as sulphur, chloride, CO 2 in the gas mixture. 15 The issue can be tackled by using coatings (organic, inorganic or metallic layers 17 ) that work as barriers to prevent excessive exposure of metal materials to hydrogen and impurities.…”