<strong>Ce</strong>添加对<strong>Zn-0.6Cu-0.3Ti</strong>合金组织与耐蚀性能的影响

doi:10.11902/1005.4537.2023.149

中国腐蚀与防护学报

2023, Vol. 43

Issue (4): 803-811 CSTR: 32134.14.1005.4537.2023.149 DOI: 10.11902/1005.4537.2023.149

中国腐蚀与防护学会杰出青年成就奖论文专栏

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Ce添加对Zn-0.6Cu-0.3Ti合金组织与耐蚀性能的影响

倪雅¹, 施方长¹(

), 戚继球²

^1.江苏中矿大正表面工程技术有限公司徐州 221000
^2.中国矿业大学材料与物理学院徐州 221116

Effect of Ce on Microstructure and Corrosion Resistance of Zn-0.6Cu-0.3Ti Alloy

NI Ya¹, SHI Fangchang¹(

), QI Jiqiu²

^1.Jiangsu CUMT Dazheng Surface Engineering Technology CO., Ltd., Xuzhou 221000, China
^2.School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116, China

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摘要:

将稀土Ce添加到Zn-0.6Cu-0.3Ti合金中，设计熔炼Zn-0.6Cu-0.3Ti-(0.3~0.6)Ce系列合金，采用X射线衍射仪 (XRD)、扫描电镜 (SEM)、电化学腐蚀测试等研究了Ce添加对Zn-0.6Cu-0.3Ti合金组织与耐蚀性能的影响。结果表明，添加稀土Ce后，Zn-0.6Cu-0.3Ti合金中析出CeZn₅微米颗粒，其分布于Zn基体内部或者相界面处，促进Zn基体以枝晶方式生长，并细化Zn枝晶和二次枝晶。Ce的添加在整体上提高了Zn-Cu-Ti合金的自腐蚀电位，降低合金的自腐蚀电流密度，添加0.3% Ce后，Zn-0.6Cu-0.3Ti合金的自腐蚀电流从2.76×10^-3 A/cm²快速降低到5.85×10^-4 A/cm²，腐蚀时间越长，Ce含量对Zn-Cu-Ti-Ce合金腐蚀性能的影响越弱。含Ce合金阻抗谱只有一个容抗弧，在腐蚀初期，Ce含量对容抗弧半径影响较小，随着腐蚀时间的延长，Ce的影响越来越明显，总体呈增大趋势。

关键词 ： Zn-Cu-Ti合金和涂层, Ce添加, 组织特征, 腐蚀性能

Abstract：

A series of cast Ce-containing Zn-alloys Zn-0.6Cu-0.3Ti-(0.3-0.6)Ce was prepared, and the effect of Ce addition on the microstructure and corrosion resistance of Zn-0.6Cu-0.3Ti alloy were investigated by means of X-ray diffractometer, scanning electron microscope and electrochemical corrosion test. The results showed that due to the addition of the rare earth Ce, CeZn₅ micron particles emerged in the alloys, which were distributed inside the Zn matrix or at phase boundaries, promoting the growth of the Zn matrix as dendrites and refining the Zn dendrites and secondary dendrites. Correspondingly, the free-corrosion current density of Zn-0.6Cu-0.3Ti alloy decreased rapidly from 2.76×10^-3 A/cm² to 5.85×10^-4 A/cm² after the doping of 0.3% Ce. The effect of Ce content on the corrosion properties of Zn-Cu-Ti-Ce alloy becomes weaker as the corrosion time increases. The impedance spectra of the alloy containing Ce has only one capacitive arc, in the early stage of corrosion, the influence of Ce content on the radius of the capacitive arc is small, with the extension of corrosion time, the influence of Ce becomes more and more obvious, and the overall trend is increasing.

Key words： Zn-Cu-Ti alloys and coating element Ce doping metallographic characteristic corrosion resistance

收稿日期: 2023-05-08 32134.14.1005.4537.2023.149

ZTFLH:

TG174

通讯作者: 施方长，E-mail: 843337412@qq.com，研究方向为金属材料、新能源材料及防火材料等 E-mail: 843337412@qq.com

Corresponding author: SHI Fangchang, E-mail: 843337412@qq.com E-mail: 843337412@qq.com

作者简介: 倪雅，男，1984年生，博士，高级工程师，2021 年毕业于中国矿业大学，获博士学位。现就职于江苏中矿大正表面工程技术有限公司，高级工程师，副总经理。倪雅博士主要研究方向为复杂环境下特大桥梁腐蚀控制技术。以提升国家重大桥梁工程耐久性为导向，开发了适用于海洋湿热环境下Zn 基热喷涂金属涂层及智能涂装技术，解决了深中通道、舟岱跨海通道等国家工程的钢结构耐久性问题。通过改性硅基纳米密封材料、干燥空气除湿、低氧腐蚀抑制、腐蚀监测及全寿命预测技术的研发，在国内首次构建了成套大跨径悬索桥缆索智能腐蚀控制技术，相关成果在南沙大桥桥、五峰山长江大桥、虎门大桥等国家重大工程中获得应用。先后主持或参与国家铁路局、江苏省重点研发计划等多个省部级课题项目。现任全国金属与非金属覆盖层标准化委员会委员，累计审查国家、行业标准近20 项，以第一作者或通讯作者发表论文20 余篇，授权发明专利16 件，主持或参与编制国家标准6 项。入选江苏省333 高层次人才、江苏省产业教授、徐州市优秀人才等人才培养计划。获江苏省科学技术一等奖1 项、中国腐蚀与防护学会科学技术二等奖1项。2023 年获得中国腐蚀与防护学会杰出青年成就奖。

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引用本文:

倪雅, 施方长, 戚继球. Ce添加对Zn-0.6Cu-0.3Ti合金组织与耐蚀性能的影响[J]. 中国腐蚀与防护学报, 2023, 43(4): 803-811.
NI Ya, SHI Fangchang, QI Jiqiu. Effect of Ce on Microstructure and Corrosion Resistance of Zn-0.6Cu-0.3Ti Alloy. Journal of Chinese Society for Corrosion and protection, 2023, 43(4): 803-811.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2023.149 或 https://www.jcscp.org/CN/Y2023/V43/I4/803

表1 试样化学成分 (mass fraction / %)

图1 Zn-0.6Cu-0.3Ti-Ce合金的XRD谱

图2 Zn-0.6Cu-0.3Ti-Ce合金的金相显微组织

图3 Zn-0.6Cu-0.3Ti-0.3Ce合金组织和成分的SEM和EPMA分析

图4 Zn-0.6Cu-0.3Ti-0.3Ce合金的透射组织形貌与能谱分析

图5 Zn-0.6Cu-0.3Ti-Ce合金的极化曲线

图6 Zn-0.6Cu-0.3Ti-Ce合金腐蚀不同时间后的极化曲线的拟合值

图7 Zn-0.6Cu-0.3Ti-Ce合金腐蚀不同时间后的极化曲线

图8 Zn-0.6Cu-0.3Ti-Ce合金腐蚀不同时间后的电化学阻抗谱

表2 Zn-0.6Cu-0.3Ti-Ce合金腐蚀不同时间后的阻抗曲线的拟合值

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