Cu对Zr-1Sn-0.35Fe-0.15Cr-0.10Nb合金在400℃含氧过热蒸气中耐腐蚀性能的影响  

Effect of Cu on Corrosion Resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb Alloy in 400℃ Oxygen-Contained Super-Heated Steam

作　　者：徐诗彤 白勇 姚美意[1] 黄建松 胡丽娟[1] 林晓冬 谢耀平[1] 梁雪[2] 彭剑超[2] 周邦新[1] Xu Shitong;Bai Yong;Yao Meiyi;Huang Jiansong;Hu Lijuan;Lin Xiaodong;Xie Yaoping;Liang Xue;Peng Jianchao;Zhou Bangxin(Institute of Materials,Shanghai University,Shanghai 200072,China;Laboratory for Microstructure,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学材料研究所,上海200072 [2]上海大学微结构重点实验室,上海200444

出　　处：《稀有金属材料与工程》2023年第6期2169-2175,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51871141)。

摘　　要：为了探究Cu对Zr-1Sn-0.35Fe-0.15Cr-0.10Nb(质量分数,%)合金在400℃/1×10^(-6)μL/L含氧过热蒸气中耐腐蚀性能的影响。将Zr-1Sn-0.35Fe-0.15Cr-0.10Nb和Zr-1Sn-0.35Fe-0.15Cr-0.10Nb-0.05Cu合金样品放入动态高压釜中进行400℃/10.3 MPa/1×10^(-6)μL/L含氧过热蒸气腐蚀试验。采用SEM、TEM和XPS等表征手段对氧化膜的显微组织以及氧化膜中各元素的价态进行分析。结果表明:微量Cu的添加改善了Zr-1Sn-0.35Fe-0.15Cr-0.10Nb合金的耐腐蚀性能;Cu在氧化膜中主要以Cu和Cu^(+)形式存在;Cu的添加会促进氧化膜中的Sn和Sn^(2+)向Sn4+和Fe^(2+)向Fe^(3+)的转化。从Cu的添加影响氧化膜中合金元素的氧化行为和抑制了氧化膜中孔隙和裂纹生成等角度探讨了Cu改善Zr-1Sn-0.35Fe-0.15Cr-0.10Nb合金耐腐蚀性能的原因。In order to explore the effect of Cu on the corrosion resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb(mass fraction,%)alloy in 400℃/1×10^(-6)μL/L oxygen-contained super-heated steam,Zr-1Sn-0.35Fe-0.15Cr-0.10Nb and Zr-1Sn-0.35Fe-0.15Cr-0.10Nb-0.05 alloy specimens were corroded in 400℃/10.3 MPa/1×10^(-6)μL/L oxygen-contained super-heated steam by a dynamic autoclave.The microstructure of the oxide films and the valence state of the alloying element were studied by SEM,TEM,and XPS.The results show that the addition of Cu can improve the corrosion resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb alloy;Cu mainly exists in the form of Cu and Cu^(+)in the oxide film;Cu can promote the transformation of Sn and Sn^(2+)into Sn4+and from Fe^(2+)into Fe^(3+)in the oxide film;The reasons of Cu improving the corrosion resistance of Zr-1Sn-0.35Fe-0.15Cr-0.10Nb alloy are discussed from the aspects that the addition of Cu affects the oxidation behavior of alloying elements and inhibits the formation of pores and cracks in the oxide film.

关 键 词：CU 锆合金 腐蚀行为 显微组织 

分 类 号：TG146.414[一般工业技术—材料科学与工程]