304L在模拟压水堆一回路条件下长期均匀腐蚀性能的研究

中国腐蚀与防护学报

2013, Vol. 33

Issue (4): 288-292

研究报告

本期目录 | 过刊浏览

304L在模拟压水堆一回路条件下长期均匀腐蚀性能的研究

彭德全胡石林张平柱王辉

中国原子能科学研究院北京 102413

Research on General Corrosion Property of 304L Stainless Steel in Simulated PWR Primary Water

PENG Dequan, HU Shilin, ZHANG Pingzhu, WANG Hui

China Institute of Atomic Energy, Bejing 102413, China

全文: PDF(3127 KB)

摘要: 在模拟压水堆一回路水条件下，用静态高压釜对304L不锈钢进行了1680 h腐蚀实验，对氧化膜进行了宏观和微观分析，对均匀腐蚀和均匀腐蚀速率进行了定量评估。结果表明：304L不锈钢在很短的时间内（336 h）就形成了氧化物层。氧化物分为两层，最靠近基体的氧化物颗粒直径为50~100 nm，在细小致密的氧化物颗粒表面均匀分布着0.5~1.6 μm的多边形大颗粒。经过1680 h高温高压腐蚀实验，最靠近基体的氧化物颗粒直径增大为80~250 nm，致密细小氧化物颗粒表面分布的多边形颗粒直径增大为0.8~2.5 μm。致密细小氧化物膜具有很强的耐蚀性，腐蚀增重速率先是大幅降低，然后逐渐平缓。经过1680 h后，其均匀腐蚀速率降为2.85×10^-3 mg/(dm²h)。

关键词 ：均匀腐蚀, 304L不锈钢, 氧化物颗粒

Abstract：The general corrosion behavior of 304L grade stainless steel in simulated pressurized water reactor (PWR) primary loop was studied using still autoclave, the corrosion test lasted for 1680 h. The corrosion oxide films were analyzed macroscopically and microscopically. The general corrosion and general corrosion rate of 304L stainless steel was quantitatively valued. Results showed that the oxide film was formed on the surface of 304L in 336 h. Oxide films were two sub-layers structure, the diameter of oxide particles near the metal substrate ranged from 50 to 100 nm, polygonal bigger oxide particles with diameter ranging from 0.5 to 1.6 μm were distributed on the small particles. After 1680 h experiment of high temperature and high pressure, the diameter of small particles near the metal substrate grew up to 80 to 250 nm, the bigger oxide particles grew up to 0.8~2.5 μm. The compact and small particle oxide film was very corrosion resistant. The weight gain rate of samples declined very much firstly, and then changed little. After 1680 h corrosion test, the general corrosion rate declined to only 2.85×10^-3 mg/(dm²h).

Key words： general corrosion 304L stainless steel oxide particle

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彭德全, 胡石林, 张平柱, 王辉. 304L在模拟压水堆一回路条件下长期均匀腐蚀性能的研究[J]. 中国腐蚀与防护学报, 2013, 33(4): 288-292.
PENG Dequan, HU Shilin, ZHANG Pingzhu, WANG Hui. Research on General Corrosion Property of 304L Stainless Steel in Simulated PWR Primary Water. Journal of Chinese Society for Corrosion and protection, 2013, 33(4): 288-292.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I4/288

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