【摘要】 <正> 连多硫酸（H_zS_xO₆,x=2,3,4,5）容易引起敏化的奥氏体不锈钢发生应力腐蚀开裂。前人测定不锈钢在Samens溶液中的阳极极化曲线,或用U型试样进行应力蚀研究。本工作采用炼油厂的现场水样,测定敏化的1Cr18Ni9Ti不锈钢的电化学行为和应力腐蚀敏感性。更多还原

【Abstract】 Stress Corrosion Cracking（SCC）susceptibility of sensitized 1 Cr18Ni9Ti austenitic steel was investigated by measuring potgntiody- namie polarization curves（sean rates:10 mV/min and 20 mV/s）and using the slow strain rate test（SSRT）in the polythionic acid solution formed in the petroleum refinery. The results showed that there was a critical potential range between +60 and +1200 mV（SCE）in H₂S_xO₆ solution in refinery for stress corrosion cracking of sensitized 1 Cr18Ni9Ti stainless steel to occur. The metallographic studies of the fractured surface by SEM revealed intergranular and quasi-cleavage fracture in the critical potential zone.更多还原