压水堆核电厂一回路水化学条件下304L不锈钢表面钝化研究  

Study on Surface Passivation of 304L Stainless Steel under the Condition of Primary Water Chemistry in PWR Nuclear Power Plant

作　　者：程伟 金成毅 汲大朋 王磊 刘航 汪浩川 李华儒 Cheng Wei;Jin Chengyi;Ji Dapeng;Wang Lei;Liu Hang;Wang Haochuan;Li Huaru(State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment,Shenzhen,Guangdong,518172,China;China Nuclear Power Engineering Co.,Ltd.,Shenzhen,Guangdong,518026,China;China Nuclear Power Design Co.,Ltd.,(Shenzhen),Shenzhen,Guangdong,518124,China)

机构地区：[1]核电安全监控技术与装备国家重点实验室,广东深圳518172 [2]中广核工程有限公司,广东深圳518026 [3]深圳中广核工程设计有限公司,广东深圳518124

出　　处：《核动力工程》2023年第6期254-259,共6页Nuclear Power Engineering

摘　　要：通过实验模拟304L不锈钢(304L SS)在压水堆核电厂一回路B+Li水化学环境下的钝化反应过程,研究了时间和温度变化对于钝化反应过程的影响。结果表明,304L SS表面钝化生成的氧化膜呈双层膜结构,并且在300 h范围内,氧化膜处于一个不断生长的状态,膜厚度、抗腐蚀能力与钝化时间呈正相关关系。提高钝化温度可以让304L SS表面的氧化膜生长得更加均匀,从而提升表面氧化膜的整体抗腐蚀能力。基于实验结果,本文分析提出了一种氧化膜综合生长模型,并对相关结论应用于热态功能试验首次钝化试验的工程前景进行了讨论。The passivation reaction process of 304L stainless steel(304L SS)in the primary B+Li water chemistry environment of PWR nuclear power plant was simulated experimentally,and the effects of time and temperature changes on the passivation reaction process were studied.The results show that the oxide films grown formed by passivation on the surface of 304L SS has a double-layer structure,and the oxide films grown is in a state of continuous growth within 300 h,and the film thickness and corrosion resistance are positively correlated with passivation time.Increasing the passivation temperature can make the oxide films grown on the surface of 304L SS grow more evenly,thus improving the overall corrosion resistance of the oxide film on the surface.Based on the experimental results,this paper analyzes and puts forward a comprehensive growth model of oxide film,and discusses the engineering prospect of applying relevant conclusions to the first passivation test of hot functional testing.

关 键 词：304L不锈钢 钝化试验 氧化膜 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TL421.1[金属学及工艺—金属学]