Development of prevention technology of hydrogen absorption for steels by improving electrochemical property of non-metallic inclusions

研制了一种用于研究金属小面积吸氢行为的微渗透池。在接近中性的环境中，碳钢表面的氢吸收优先位点是MnS夹杂体。结果表明，MnS包体的溶解极大地增加了氢的渗透电流。硫化物溶解释放的HS-离子促进了钢表面的吸氢反应。Ti（C，N）包裹体在近中性环境中不溶解，不促进氢的吸收。

A micro permeation cell for studying hydrogen absorption behavior in a small area on metals was developed. The preferential sites of hydrogen absorption of carbon steel surfaces were found to be MnS inclusions in near-neutral environments. It was demonstrated that the hydrogen permeation currents were extremely increased by the dissolution of MnS inclusions. HS- ions released from the sulfide dissolution promote the hydrogen absorption reaction on steel surfaces. Ti(C,N) inclusions do not dissolve and do not promote the hydrogen absorption in near-neutral environments.