摘要
研究了12Cr13钢在450℃静态饱和氧液态铅铋合金中6000h长时间腐蚀行为,分析了腐蚀过程中氧化膜的形貌、组成及腐蚀动力学行为。结果表明,12Cr13钢氧化膜的生长速率缓慢,氧化膜厚度符合抛物线规律,腐蚀3000h后形成典型的双层结构氧化膜,内层为Fe-Cr尖晶石,外层为Fe_(3)O_(4)。Cr在微米尺度的扩散对表面氧化膜的形成和内氧化层的向内稳步推进至关重要。同时,腐蚀3000h后存在氧化膜的剥离现象,此现象可能与腐蚀试样原始表面存在的凹凸面有关。基于实验结果提出了12Cr13钢的液态铅铋腐蚀模型。
The long-term corrosion behavior of 12Cr13 steel was investigated in a static oxygen saturated liquid lead-bismuth alloy at 450℃for 6000h.The morphology,composition,and corrosion kinetics of the oxide film during the corrosion process were analyzed.The results indicate that the growth rate of the oxide film on 12Cr13 steel is slow,and the thickness of the oxide film follows a parabolic law.After 3000h of corrosion,a typical double-layer structure oxide film forms with an inner layer of Fe-Cr spinel and an outer layer of Fe_(3)O_(4).The diffusion of Cr at the micron scale plays a crucial role in forming the surface oxide film and inward steady progression of the inner oxide layer.Additionally,there is an evidence of peeling-off phenomenon in the oxide film after 3000h,which may be associated with unevenness on original corroded sample surfaces.Based on these experimental findings,a corrosion model for 12Cr13 steel in liquid lead-bismuth was proposed.
作者
唐正焮
张文宁
马国宝
何西扣
TANG Zhengxin;ZHANG Wenning;MA Guobao;HE Xikou(Institute for Special Steels,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;NCS Testing Technology Co.,Ltd.,Beijing 100094,China)
出处
《钢铁研究学报》
北大核心
2025年第5期660-669,共10页
Journal of Iron and Steel Research
关键词
12Cr13钢
铅铋合金
铅铋腐蚀
氧化膜
腐蚀机制
12Cr13 steel
lead-bismuth eutectic alloy
lead-bismuth corrosion
oxide film
corrosion mechanism
作者简介
唐正焮(1993-),男,博士,高级工程师,E-mail:tangzhengxin@nercast.com。
