Hydrogen Embrittlement Suppression Based on Protective Film-Oriented Compositional Design

在文献调研的基础上，对氢的溶解度极低的氧化物物种进行了研究。从抑制氢渗透的角度出发，认为Cr2O_3具有良好的阻氢性能。用电化学氢渗透技术评价了430不锈钢在不同表面处理和氧化处理条件下形成的氧化层的透氢性能。即使是纳米级的富铬氧化物也会显著降低氢的允许电流。不同类型的表面光洁度表现出不同的放氢电流行为，这可能是由于氧化层的保护性不同所致。

Oxide species of which solubility of hydrogen is extremely low has been investigated based on literature survey. It has been considered that Cr2O3 shows excellent performance from the suppression of hydrogen permeation point of view.Hydrogen permeability of the oxide layer which formed on type 430 stainless steel with different condition of surface finish and oxidation treatment has been evaluated by electrochemical hydrogen permeation technique. Even a nanometer-scaled Cr rich oxide decrease the hydrogen permission current significantly. Different hydrogen permission current behaviors have been found for different type of surface finish and it may be due to the difference in protectiveness of oxide layer.