The process of ion nitriding by pulsed plasma for obtaining diffusion barrier for the hydrogen for the steel API 5L X - 65

摘要

"Diffusion barrier for hydrogen in steel using pulsed plasma ion nitriding process.The present invention relates to a process of ion nitriding by pulsed plasma for the formation of diffusion barrier for hydrogen in steels, here exemplified for steel API 5L X - 65.A steel of high mechanical strength and low alloy.The pulsed plasma ion nitriding for consisted of lead ions and active species of atomic and molecular nitrogen to the surface of the material by applying a potential difference between the twoThe electrodes interrupted periodically with a predetermined frequency, where the cathode is the material itself (or part) to be treated.In a previously evacuated chamber in which the gas in a gas mixture containing nitrogen gas is introduced.