由于氚有放射性且易沾污样品,利用氢模拟氚对样品退火处理,结合光谱测试技术,初步探讨了表面涂层的防氚渗透机理。氢在金属中进行间隙原子扩散。渗透时H2物理吸附于316L前表面并离解成原子,进入基体后存在于八面体间隙中,从一个间隙位置迁移到另一个间隙位置,最后在后表面解吸 Due to the radioactivity of tritium and the easy contamination of samples, the tritium hydrogen is used to anneal the sample with the tritium hydrogen, and the tritium permeation mechanism of the surface coating is preliminarily discussed in combination with the spectral test technology. Hydrogen interstitial atom diffusion in metals. H2 penetrates into the front surface of the physical adsorption of 316L and dissociated into atoms, into the matrix after octahedral interstitial exists in the migration from one gap position to another gap position, and finally in the back surface desorption