模拟压水堆一回路水中预充氢对316L不锈钢氧化膜的影响  

Effect of Pre-charged Hydrogen on the Oxide Film of 316LStainless Steel in Simulated PWR Primary Water

作　　者：崔同明 蔡爽巍 宁飞 张锟 马佳荣 吕战鹏[1,2] 王东辉[3] 钟志民[3] CUI Tongming;CAI Shuangwei;NING Fei;ZHANG Kun;MA Jiarong;Lü Zhanpeng;WANG Donghui;ZHONG Zhimin(Institute of Materials,School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China;State Key Laboratory of Special Steel Metallurgy and Preparation,Shanghai University,Shanghai 200072,China;National Nuclear Power Plant Operation Service Technology Co.,Ltd.,Shanghai 201306,China)

机构地区：[1]上海大学材料科学与工程学院材料研究所,上海200072 [2]上海大学省部共建特殊钢冶金与制备国家重点实验室,上海200072 [3]国核电站运行服务技术有限公司,上海201306

出　　处：《腐蚀与防护》2021年第6期1-7,共7页Corrosion & Protection

基　　金：国家科技重大专项(2015ZX06002005);国家自然科学基金(51771107)。

摘　　要：采用扫描电镜和X射线光电子能谱仪,分析了有无充氢冷加工316L不锈钢在300℃除氧的模拟压水堆一回路水中浸泡168 h后,其表面氧化膜的厚度及成分。结果表明:有无充氢试样表面形成的氧化膜均为双层结构,外层氧化膜的氧化物颗粒富含Fe,内层氧化膜的氧化物颗粒富含Cr。与未充氢试样比,充氢试样氧化膜的厚度较厚,外层氧化膜的氧化物颗粒较大且Fe与Cr的质量分数比较大;充氢导致试样内层氧化膜Fe含量升高,OH-与O2-的原子分数比增大,抑制了Cr氧化物的形成,使氧化膜中Cr含量下降,从而降低了氧化膜的保护性,加速基体的氧化。Through scanning electron microscopy and X-ray photoelectron spectroscopy, the thickness and composition of the oxide films formed on the surfaces of cold-worked 316 L stainless steel with and without hydrogen-charging after immersion in deoxidized simulated PWR primary water at 300 ℃ for 168 h were analyzed. The results show that the oxide films of samples with and without hydrogen-charging were all double-layer structures. The oxide particles of the outer oxide film were rich in Fe, and the oxide particles of the inner oxide film were rich in Cr. The thickness of the hydrogen-charging sample oxide film increased, the oxide particles of the outer oxide film were larger and the ratio of Fe mass fraction to Cr mass fraction was greater, compared to the sample without hydrogen-charging. The hydrogen charging increased the Fe content of the inner oxide film of sample, increased the OH- and O2- atomic fraction ratio, inhibitted the formation of Cr oxide, and reduced the Cr content of oxide film, thereby reducing the protection of the oxide film and accelerating the oxidation of the substrate.

关 键 词：不锈钢 冷加工 充氢 压水堆一回路水 氧化膜 

分 类 号：TG172[金属学及工艺—金属表面处理]