轧制对<strong>ZM5</strong>镁合金腐蚀性能的影响

doi:10.11902/1005.4537.2023.029

中国腐蚀与防护学报

2024, Vol. 44

Issue (1): 213-220 CSTR: 32134.14.1005.4537.2023.029 DOI: 10.11902/1005.4537.2023.029

研究报告

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轧制对ZM5镁合金腐蚀性能的影响

宋东东¹, 万红霞²(

), 徐栋¹, 周倩¹

^1.华北电力大学电站能量传递转化与系统教育部重点实验室北京 102206
^2.中国石油大学(北京)新能源与材料学院北京 102249

Influence of Rolling on Corrosion Behavior of ZM5 Mg-alloy

SONG Dongdong¹, WAN Hongxia²(

), XU Dong¹, ZHOU Qian¹

^1.Key Laboratory of Power Station Energy Transfer Conversion and System, Ministry of Education, North China Electric Power University, Beijing 102206, China
^2.School of New Energy and Materials, China University of Petroleum, Beijing 102249, China

引用本文:

宋东东, 万红霞, 徐栋, 周倩. 轧制对ZM5镁合金腐蚀性能的影响[J]. 中国腐蚀与防护学报, 2024, 44(1): 213-220.
Dongdong SONG, Hongxia WAN, Dong XU, Qian ZHOU. Influence of Rolling on Corrosion Behavior of ZM5 Mg-alloy[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(1): 213-220.

全文: PDF(7504 KB) HTML

摘要:

采用析氢、失重、电化学阻抗谱(EIS)、动态电位极化测试、XRD和SEM等方法对比研究了轧制前后ZM5镁合金腐蚀性能和微观组织的变化，并通过第一性原理分析研究了合金不同微观组织的电子功函数，探究轧制对ZM5镁合金腐蚀性能的影响。结果表明，轧制使ZM5发生明显的择优取向，轧制后ZM5的腐蚀失重、析氢量都显著下降，而极化电阻明显上升，表明轧制态镁合金的耐蚀性优于铸造镁合金。模拟计算结果表明α相的重排提高了轧制合金的电子功函数。

关键词 ：镁合金, 轧制态, 腐蚀行为, 第一性原理, 电子功函数

Abstract：

The corrosion performance and microstructure of ZM5 Mg-alloy before and after rolling were comparatively studied by hydrogen evolution measurement, mass loss method, electrochemical impedance spectroscopy (EIS), dynamic potential polarization measurement, XRD and SEM. The electron work function of different microstructures was numerically simulated through first principle analysis. The results show that rolling causes an obvious preferred orientation for ZM5 Mg-alloy. The corrosion mass loss and hydrogen evolution of ZM5 Mg-alloy decrease significantly after rolling, while the polarization resistance increases obviously. These all indicated that the corrosion resistance of the rolled ZM5 Mg-alloy is better than that of the cast one. The simulation results show that the rearrangement of α-phase enhances the electronic work function of the Mg-alloy.

Key words： Mg-alloy rolling corrosion behavior first-principles electron work function

收稿日期: 2023-02-10 32134.14.1005.4537.2023.029

ZTFLH:

TG147

基金资助:国家自然科学基金(51701055);国家自然科学基金(52101112);中央高校基本科研业务费专项(2023MS011)

通讯作者: 万红霞，E-mail：wanhongxia88@163.com，研究方向为油气装备材料腐蚀与防护

Corresponding author: WAN Hongxia, E-mail: wanhongxia88@163.com

作者简介: 宋东东，男，1987年生，博士，副教授

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图1 ZM5镁合金轧制前后的形貌

图2 铸态和轧制态ZM5镁合金的XRD谱图

图3 铸态和轧制态ZM5镁合金在3.5%NaCl浸泡过程中的失重和析氢体积的变化

图4 ZM5镁合金轧制前后在3.5%NaCl中的极化曲线

表1 极化曲线拟合数据

图5 铸轧ZM5镁合金在3.5%NaCl溶液中浸泡不同时间的EIS图

图6 铸轧合金不同浸泡时间的EIS等效电路

图7 ZM5镁合金轧制前后在3.5%NaCl溶液中浸泡不同时间的Rp值

图8 ZM5镁合金轧制前后的静电势能曲线和计算模型

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