关键词: H₂S, MnS夹杂, 带状组织, 正火处理

Abstract: Based on the analysis of the key influencing factors of H2S corrosion resistant steel plate ( wass fraction/% ：0.16C,0.32Si,1.25Mn,0.018Al,0.0007S,0.007P) in failure process,the mechanism of H₂S corrosion failure and the method of improving the corrosion resistance of H₂S are illustrated by comparing the influence of inclusion and banded structure on H₂S corrosion performance. The results show that MnS inclusion and continuous banded structure are the key factors that lead to the corrosion cracking of H₂S, and the HIC corrosion performance can be obviously improved as the banded structure is changed by continuous-intermittent twice 880 ℃ as 60 min normalized treatment and the Length crack sensitivity is 0.