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模拟高放玻璃固化体在多重介质下的腐蚀行为

华小辉, 游新锋, 李腾, 张振涛

华小辉, 游新锋, 李腾, 张振涛. 模拟高放玻璃固化体在多重介质下的腐蚀行为[J]. 核化学与放射化学, 2019, 41(5): 484-491. DOI: 10.7538/hhx.2019.YX.2018043
引用本文: 华小辉, 游新锋, 李腾, 张振涛. 模拟高放玻璃固化体在多重介质下的腐蚀行为[J]. 核化学与放射化学, 2019, 41(5): 484-491. DOI: 10.7538/hhx.2019.YX.2018043
HUA Xiao-hui, YOU Xin-feng, LI Teng, ZHANG Zhen-tao. Corrosion Behavior of Simulated HLW Glass in Multimedia Environment[J]. Journal of Nuclear and Radiochemistry, 2019, 41(5): 484-491. DOI: 10.7538/hhx.2019.YX.2018043
Citation: HUA Xiao-hui, YOU Xin-feng, LI Teng, ZHANG Zhen-tao. Corrosion Behavior of Simulated HLW Glass in Multimedia Environment[J]. Journal of Nuclear and Radiochemistry, 2019, 41(5): 484-491. DOI: 10.7538/hhx.2019.YX.2018043

模拟高放玻璃固化体在多重介质下的腐蚀行为

Corrosion Behavior of Simulated HLW Glass in Multimedia Environment

  • 摘要: 考察了模拟高放玻璃固化体在多重介质下关键元素的浸出和玻璃表面的腐蚀行为。在90 ℃下,北山二长花岗岩、高庙子膨润土和北山地下水按一定质量比加入微型反应釜中,将玻璃片放入膨润土中,反应从7 d持续至720 d。利用电感耦合等离子体质谱(ICP-MS)/电感耦合等离子体原子发射光谱(ICP-AES)分析溶液中元素的浸出浓度。采用扫描电子显微镜和电子能谱分析玻璃断面的形貌和腐蚀界面的元素分布。结果表明,玻璃体腐蚀实验180 d后,各元素的浸出浓度趋近饱和。玻璃的腐蚀在初期较为缓慢,90 d后在玻璃表面有明显的腐蚀层形成。实验360 d后,玻璃表面发生非均匀腐蚀,在断面形成楔形的腐蚀区域。在多重介质下,玻璃体的平均腐蚀速率为0.4 μm/d。
    Abstract: The release of key elements and corrosion behavior of simulated HLW glass were investigated in multimedia environment. Beishan monzonitic granite, Gaomiaozi bentonite and simulated Beishan underground water were added to the micro-reactor at a certain mass ratio, while the glass piece was placed in bentonite at 90 ℃. The reaction lasted from 7 days to 720 days. The leaching concentration of the elements in solution was analyzed using ICP-MS/AES. Scanning electron microscopy and energy dispersive spectrometer were utilized to determine the cross-section morphology of the glass and the elemental distribution of the corrosion interface. The results show that the leaching concentrations of the elements approach saturation after 180 days’ experiment. The initial corrosion of glass is not obvious, while there exists a clear corrosion layer after 90 days. After 360 days’ experiment, heterogeneous corrosion occurrs on the glass surface and wedge-shaped corrosion area forms on the corrosion interface. The average corrosion rate of the glass is 0.4 μm/d in multimedia environment.
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  • 刊出日期:  2019-10-19

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