Cr对Zr-0.3Cu合金在360℃/18.6 MPa/0.01 mol/L LiOH水溶液中腐蚀行为的影响  

Effect of Cr on Corrosion Behavior of Zr-0.3Cu Alloy in 360℃/18.6 MPa/0.01 mol/L LiOH Aqueous Solution

作　　者：范周洋 林晓冬 张革 张弛 李毅丰[1,2] 梁雪 彭剑超[2] 李强[2] Fan Zhouyang;Lin Xiaodong;Zhang Ge;Zhang Chi;Li Yifeng;Liang Xue;Peng Jianchao;Li Qiang(Institute of Materials,Shanghai University,Shanghai 200072,China;Laboratory for Microstructures,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1期167-178,共12页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(52001192,51901123)。

摘　　要：通过制备Zr-0.3Cu-xCr(x=0.2,0.5,1.0,%,质量分数,下同)合金,并在360℃/18.6 MPa/0.01 mol/L LiOH水溶液中进行高压釜腐蚀实验,研究了Cr对Zr-0.3Cu合金腐蚀行为的影响。结果表明,随Cr含量增加,Zr-0.3Cu-xCr中的ZrCr2第二相数量增多,而Zr2Cu第二相数量无明显变化。在360℃/18.6 MPa/0.01 mol/L LiOH水溶液中,Zr-0.3Cu-0.2Cr合金的耐腐蚀性能较好,可能与氧化膜/基体界面较厚的ZrO过渡层和基体内较少的第二相有关。然而,当Cr含量超过0.5%时,由于合金中第二相数量增多,氧化时产生的缺陷较多,Zr-0.3Cu-xCr合金腐蚀加剧。Zr-0.3Cu-xCr(x=0.2,0.5,1.0,wt%,the same below)alloys were prepared to investigate the effect of Cr on the corrosion behavior of Zr-0.3Cu alloy in 360℃/18.6 MPa/0.01 mol/L LiOH aqueous solution.The results show that with the increase of Cr content,the number of ZrCr2 secondary phase particles(SPPs)increases,while the number of Zr2Cu SPPs is nearly unchanged.After exposure to the aqueous solution,the corrosion resistance of Zr-0.3Cu-0.2Cr alloy is relatively high compared to other alloys,which is probably due to the thick ZrO transition layer at the oxide/matrix interface and less second phase in the matrix.When the Cr content is higher than 0.5wt%,the number of SPPs increases,which can generate more defects like micropores and microcracks during oxidation,and consequently,accelerate the corrosion of Zr-0.3Cu-xCr alloys.

关 键 词：锆合金 Cr添加 显微组织 耐腐蚀性能 第二相 

分 类 号：TG146.414[一般工业技术—材料科学与工程]