物理学报2024，Vol.73Issue(2)：206-219,14.DOI:10.7498/aps.73.20231103
含铝强化奥氏体钢在550℃液态铅铋中的腐蚀行为
Corrosion behavior of aluminum reinforced austenitic steel in liquid lead bismuth at 550℃
摘要
Abstract
The key material issue for the commercialization of advanced lead cooled fast reactors and accelerator driven subcritical systems is the compatibility between structural materials and lead based coolants.Structural steel materials require excellent corrosion resistance in high-temperature liquid lead bismuth eutectic(LBE)alloy.Aluminum forming austenitic steel(AFA steel)has excellent corrosion resistance in extreme environments due to its ability to form an Al2O3 film on its surface.However,excessively high Ni elements are more easily dissolved or oxidized in LBE than Fe and Cr elements.Therefore,this work investigates the effect of reducing Ni element composition(25-Ni steel and 18-Ni steel)on the corrosion resistance of steel in LBE.Surface treatment can protect the substrate from corrosion to some extent,so herein we explore whether it has a protective effect on AFA steel in LBE by generating Al2O3 through high-temperature pre oxidation.The morphology and structure of the oxide layer of AFA steel corroded for 600 h in LBE with saturated dissolved oxygen at 550℃are characterized by scanning electron microscope(SEM),energy dispersive spectrometer(EDS),X-ray diffraction(XRD),and other technologies.The results indicate that the oxide film formed after corrosion of 18-Ni steel is thinner than that after corrosion of 25-Ni steel.Performing high-temperature pre oxidation is beneficial to forming a protective Al2O3 oxide film on the surface of the sample,thereby reducing the thickness of the oxide layer and improving the material's LBE corrosion resistance.The reduction in thickness of the oxide layer generated after pre oxidation of 18-Ni steel is greater than that of 25-Ni steel,so the anti-corrosion effect of 18-Ni steel after pre oxidation is better than that of 25-Ni steel.关键词
铝强化奥氏体钢/氧化层/铅铋共晶/高温预氧化Key words
aluminum forming austenitic steel/oxide layer/lead bismuth eutectic/high temperature pre oxidation引用本文复制引用
甘舒匀,李佳奇,伍忠政,徐帅,李炳生,柴林江,陈黎明,何晓珣,汪利,刘思捷,文春梅..含铝强化奥氏体钢在550℃液态铅铋中的腐蚀行为[J].物理学报,2024,73(2):206-219,14.基金项目
高等学校博士学科点专项科研基金(批准号:20zx7104)资助的课题. Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China(Grant No.20zx7104). （批准号:20zx7104）
