具有改进耐腐蚀性能的新锆合金制备和验证  

Preparation and Verification on New Zirconium Alloys with Improved Corrosion Resistance

作　　者：曾奇锋[1] 陈磊[1] 卢俊强[1] 刘家正[1] 

机构地区：[1]上海核工程研究设计院,上海200233

出　　处：《动力工程学报》2016年第4期320-325,共6页Journal of Chinese Society of Power Engineering

基　　金：CAP1400燃料组件关键技术研究资助项目(ZB01K02B)

摘　　要：为了改进锆合金的耐腐蚀性能，提出了基于氧化膜自由能理论的设计理念，对其腐蚀规律进行系统研究．设计了7种新锆合金成分方案，并针对不同成分系统设计了具有代表性的加工工艺，最后通过高压釜试验验证设计理念，获得耐腐蚀性能优良的2种新锆合金．将试样在360℃／18．6MPa的纯水和含锂水中腐蚀200d后对比分析其腐蚀性能．结果表明：添加Cu和si的2种锆合金的耐腐蚀性能明显优于其他锆合金；对于含质量分数0．8％～1．2％Nb的锆合金，使用传统的低温退火工艺，有利于提高耐腐蚀性能；对于含质量分数0．2％～0．5％Nb的锆合金，使用8水淬来替代常规中间退火的工艺，可明显改善合金的耐腐蚀性能．To improve the corrosion resistance of zirconium alloys, a systematic study was carried out on the corrosion mechanism, and based on the free energy theory of surface oxide, a design idea was proposed subsequently. Referring to available test results, seven new zirconium alloys were designed, and for each alloy system, representative manufacturing process was worked out and validated by autoclave corrosion tests, after which two new zirconium alloys with improved corrosion resistance were obtained. The sam ples were corroded in pure water and lithiated water at 360 ~C/18.6 MPa for 200 days to make comparative analysis on the corrosion resistance. Results show that two zirconium alloys with additions of copper and silicon are found to be better than other five zirconium alloys. For zirconium alloys with 0.8-1.2 % Nb, conventional low temperature annealing process would be beneficial to the improvement of corrosion resistance, whereas for zirconium alloys with 0.2%-0.5% Nb, 13 water quenching process would be beneficial to the improvement of corrosion resistance instead of intermediate annealing.

关 键 词：锆合金 合金元素 加工工艺 耐腐蚀性能 

分 类 号：TL341[核科学技术—核技术及应用]