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논문 기본 정보

자료유형
학술저널
저자정보
Wang Da (a Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University) Leong Amanda (Nuclear Material and Fuel Cycle Center, Department of Mechanical Engineering, Virginia Polytechnic) Yang Qiufeng (Nuclear Material and Fuel Cycle Center Department of Mechanical Engineering Virginia Polytechnic In) Zhang Jinsuo (Nuclear Material and Fuel Cycle Center Department of Mechanical Engineering Virginia Polytechnic In)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제54권 제11호
발행연도
2022.11
수록면
4,062 - 4,071 (10page)
DOI
10.1016/j.net.2022.06.029

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Long-term aluminum (Al) corrosion tests were designed to investigate the condition that would generate severe Al corrosion and precipitation. Buffer agents of sodium tetraborate (NaTB), trisodium phosphate (TSP) and sodium hydroxide (NaOH) were adopted. The insulation materials, fiberglass and calcium silicate (Ca-sil), were examined to explore their effects on Al corrosion. The results show that significant precipitates were formed in both NaTB/TSP-buffered solutions at high pH. The precipitates formed in NaTB solution raise more concerns on chemical effects in GSI-191. A passivation layer formed on the surfaces of coupon in solution with the presence of insulations could effectively mitigate Al corrosion. The Fe-enriched intermetallic particles (IPs) embedded in coupon appeared to serve as seeds to readily induce precipitation via providing extra area for heterogeneous Al hydroxide precipitation. X-ray spectroscopy (EDS) and X-ray diffraction (XRD) analyses indicate that the precipitates are mainly boehmite (g-AlOOH) and no direct evidence confirms the presence of sodium aluminum silicate or calcium phosphate

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