Abstract
This paper analyzed the HSLA pipeline steel’s stress corrosion behavior and mechanism which tested in the saturated solution of H2S. The steel’s SSCC susceptibility was determined by constant load tensile according to NACE TM-0177 standard. Used SEM observed the fracture, and then the steel’s corrosion rate and short-term corrosion behavior were analyzed by electrochemical polarization curves in saturated solution of H2S in the environment A. The results show that the steel has a large SSCC susceptibility and a high corrosion rate. What’s more, corrosion rate increases with the increase of immersion time. The results also show that the crack fracture of the steel is caused by anodic dissolution and the hydrogen which penetrates into the steel can increase the anodic dissolution.
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