３１０不锈钢在０．４％Ｈ２Ｓ／Ｈ２／７％ＣＯ２的混合气氛中于６００℃发生硫化腐蚀。前５０ｈ的腐蚀遵从抛物线规律，延长至２５０ｈ的腐蚀其增重低于抛物线增长，这一转变对应于内层铬硫化物由分散的颗粒态生长成为连续层。腐蚀产物层可以分为三层：最外ＦｅＳ层，中间为尖晶石结构的ＦｅＣｒ２Ｓ４层和最内Ｃｒ３Ｓ４层
The corrosion of 3 10SS in gas mixture of 0.4H2S / H2 / 7%CO2 at 600℃was in the form of sulfidation. The mass gain due to corrosion obeyed parabolic rate law for the initial 50 h but subsequently lower rate was observed for long time exposure up to 250 h. Such change in kinetics corresponded to structure modification of the innermost layer of chromium sulfide from its particle distribution to a continuous layer. The scale consisted of the outermost layer of FeS, the middle layer of FeCr2S4 and the innermost layer of Cr3S4. Correspondent: LI Lingchuan, Department of Materials Science and Engineering, Tsinghua University, Beijing100084
参考文献
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