电极材料在铁磷酸盐玻璃熔体内腐蚀现象的研究

Study on the Corrosion of Electrode Materials in Iron Phosphate Glass Melts

选用合金Inconel690和693作为研究对象,着重研究了它们在铁磷酸盐玻璃熔体中的腐蚀行为。分别计算了不同电极材料的尺寸损失和质量损失,以及相应的损失速率,采用SEM,EDS和XRD等手段对材料表面的腐蚀层进行了分析,确定了腐蚀层的成分,主要相组成及其晶粒形态,讨论了材料腐蚀发生的可能机理。结果表明,在玻璃熔体内,合金Inconel693比Inconel690更耐腐蚀。随着腐蚀时间的延长,合金的腐蚀速率都逐渐降低。合金试样表面的腐蚀层主要由固熔体(Fe,Cr)2O3组成。

Inconel alloy 690 and Inconel alloy 693 were chosen as the electrode materials in this study and their corrosion behaviors in iron phosphate glass melt containing low activity （LAW） nuclear waste was explored. The corrosion losses in size and weight of different materials in glass melt were calculated. The corrosion layer formed on the surface of the alloys was analyzed by Scanning Electron Microscope （SEM）, Energy Dispersive X-Ray analysis （EDS） and X-ray diffraction （XRD）, and the corrosion mechanism was discussed. Results show that the Inconel alloy 693 is more stable than the Inconel alloy 690 in the （Fe,Cr）2O3, was believed to be the main crystalline phase in the corrosion layer on the surface of alloy glass melt. A kind of solid solution, samples.