Minimizing of Hydrogen Diffusion in Steel by through Electro-Polishing of Stainless Steel 316L

초록

Hydrogen embrittlement is the absorption of hydrogen in steel, deteriorating ductility and toughness, and tends to be destroyed without plastic deformation, and destruction occurs. To be destroyed, brittle destruction occurs by hydrogen remaining inside the steel and hydrogen introduced from the outside. This hydrogen embrittlement can become more sensitive as the strength of the river increases, and the amount of hydrogen remaining in the material is inevitably important to prevent hydrogen embrittlement in high-strength steel. In fact, the high-pressure hydrogen transfer tube of a hydrogen fuel cell vehicle is made of a SUS316L seamless tube with high hydrogen penetration and hydrogen embrittlement resistance. In this study, the internal electropolishing of the seamless tube is performed, and accordingly, the temperature is raised to 400°C and the diffusion of hydrogen is measured. Before actual destruction, it is necessary to measure residual hydrogen and charge electrochemical hydrogen, and to study whether hydrogen is charged through surface treatment.