Effect of Sulphide Addition to Chloride Environment on Corrosion Behavior of SAF2507 Duplex Stainless Steel

摘要

The effect of sulphide addition to chloride environment on corrosion behavior of SAF2507 stainlesssteel at different temperatures was studied by slow strain rate test and electrochemical test, the tensilefracture morphology was observed by SEM. The results indicated that sulphide could enhance thestress corrosion susceptibility of SAF2507 duplex stainless steel. In addition sulphide made the generalcorrosion resistance of SAF2507 duplex stainless steel decrease. With the increase of temperature theeffect of sulphide on rising corrosion susceptibility of steel was more obvious. In addition, sulphidemade corrosion pits occured in ferrite-austenite phase boundaries become increasing.