热镀锌层合金相的耐蚀性差异研究

doi:10.11902/1005.4537.2025.126

中国腐蚀与防护学报

2026, Vol. 46

Issue (2): 558-566 CSTR: 32134.14.1005.4537.2025.126 DOI: 10.11902/1005.4537.2025.126

研究报告

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热镀锌层合金相的耐蚀性差异研究

韩宇¹, 徐松¹, 华思然¹, 赵鹏², 王晓杰³, 夏晓健³, 张俊喜¹(

)

^1.上海电力大学上海市电力材料防护与新材料重点实验室上海 200090
^2.国网天津市电力公司电力科学研究院天津 300384
^3.国网福建省电力公司电力科学研究院福州 350007

Corrosion Behavior in 3.5%NaCl Solution of Constituent Phases of Hot-dip Galvanized Coating

HAN Yu¹, XU Song¹, HUA Siran¹, ZHAO Peng², WANG Xiaojie³, XIA Xiaojian³, ZHANG Junxi¹(

)

^1.Shanghai Key Laboratory of Material Protection and Advanced Material in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China
^2.State Grid Tianjin Electric Power Research Institute, Tianjin 300384, China
^3.State Grid Fujian Electric Power Research Institute, Fuzhou 350007, China

引用本文:

韩宇, 徐松, 华思然, 赵鹏, 王晓杰, 夏晓健, 张俊喜. 热镀锌层合金相的耐蚀性差异研究[J]. 中国腐蚀与防护学报, 2026, 46(2): 558-566.
Yu HAN, Song XU, Siran HUA, Peng ZHAO, Xiaojie WANG, Xiaojian XIA, Junxi ZHANG. Corrosion Behavior in 3.5%NaCl Solution of Constituent Phases of Hot-dip Galvanized Coating[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(2): 558-566.

全文: PDF(6575 KB) HTML

摘要:

在电力生产中，输电铁塔的安全可靠运行对于保障电力输送至关重要。本文对输电铁塔热镀锌中出现的3种相组织δ、ζ与η相耐蚀性的差异开展研究，通过熔炼合成模拟3 种相组织的手段，采用电化学测量、中性盐雾实验等方法研究了3种相组织的腐蚀行为，采用X射线衍射、扫描电子显微镜、密度泛函理论计算等方法分析了3种相组织的腐蚀特征。研究表明，3种相组织的腐蚀速率随着时间的增加呈现出先增大后减小的趋势，腐蚀速率：δ相< η相< ζ相，δ相的耐蚀性最好，ζ相的耐蚀性最差，η相的耐蚀性介于二者之间。通过研究3种相组织耐蚀性的差异，为电网输电铁塔的腐蚀防护技术提供理论支持。

关键词 ：热镀锌, 相组织, 电化学, 大气腐蚀

Abstract：

In the domain of electric power generation, the safe and reliable operation of transmission towers is paramount to ensuring the stable delivery of electricity. In order to better understand the corrosion behavior of hot dip galvanizing coatings for tower steels, herein, the corrosion behavior of the three constituent phases, of galvanized coating was comparatively assessed in 3.5%NaCl solution. They are δ-phase, ζ-phase, and η-phases, known as the typical constituent phases of the hot-dip galvanized coatings for the present transmission towers. Hence, regarding to the alloy element ratios of the three phases involved, the cast ingots of δ (FeZn7), ζ (FeZn13) and η (Zn) phases were made. Then their corrosion behavior was comparatively assessed by means of electrochemical measurements in NaCl solution and neutral salt spray test as well as X-ray diffraction (XRD), scanning electron microscopy (SEM), and density functional theory (DFT) calculations. The findings reveal that the corrosion rates of all three phases initially increase and subsequently decrease over time. Among others, the δ phase exhibits the highest corrosion resistance, followed by the η phase, whereas, the ζ phase showing the poorest resistance. These findings may be a good reference provide a for the design-making of corrosion protection strategies of power grid transmission towers, and help clarify the role of every individual constituent phase in the overall corrosion performance of galvanizing coatings for power grid transmission towers as well.

Key words： hot-dip galvanizing constituent phase electrochemistry atmospheric corrosion

收稿日期: 2025-04-23 32134.14.1005.4537.2025.126

ZTFLH:

TG172

通讯作者: 张俊喜，E-mail：zhangjunxi@shiep.edu.cn，研究方向为输变电工况下的金属腐蚀与防护

作者简介: 韩宇，男，1998年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.126 或 https://www.jcscp.org/CN/Y2026/V46/I2/558

图1 3种相的XRD谱

图2 3种相试样在3.5%NaCl溶液中浸渍14 d的EIS图

图3 拟合EIS数据的等效电路模型

图4 3种相试样在3.5%NaCl溶液中浸渍的EIS拟合参数

图5 3种相试样在3.5%NaCl溶液中浸渍14 d的极化曲线图

表1 3种相试样在3.5%NaCl溶液中浸渍14 d的腐蚀电流密度拟合值

图6 3种相试样盐雾后的腐蚀速率图

图7 3种相试样盐雾实验后腐蚀产物的XRD图

图8 3种相试样盐雾实验后腐蚀产物的SEM图

图9 3种相的结构模型与吸附氧的PDOS图

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