模拟盐碱土渗入地下海水对纯锌腐蚀行为影响的研究

doi:10.11902/1005.4537.2025.250

中国腐蚀与防护学报

2026, Vol. 46

Issue (3): 864-874 CSTR: 32134.14.1005.4537.2025.250 DOI: 10.11902/1005.4537.2025.250

研究报告

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模拟盐碱土渗入地下海水对纯锌腐蚀行为影响的研究

刘晨辉¹, 刘光明¹(

), 朱炎彬¹, 卢壹梁², 张玲玲¹, 黄泽邦¹

^1.南昌航空大学材料科学与工程学院轻量化复合材料江西省重点实验室南昌 330063
^2.中国电力科学研究院有限公司北京 100192

Corrosion Behavior of Pure Zinc in Simulated Underground Seawater Infiltrated Saline-alkali Soils

LIU Chenhui¹, LIU Guangming¹(

), ZHU Yanbin¹, LU Yiliang², ZHANG Lingling¹, HUANG Zebang¹

^1.Jiangxi Provincial Key Laboratory of Lightweight Composite Materials, School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
^2.China Electric Power Research Institute, Beijing 100192, China

引用本文:

刘晨辉, 刘光明, 朱炎彬, 卢壹梁, 张玲玲, 黄泽邦. 模拟盐碱土渗入地下海水对纯锌腐蚀行为影响的研究[J]. 中国腐蚀与防护学报, 2026, 46(3): 864-874.
Chenhui LIU, Guangming LIU, Yanbin ZHU, Yiliang LU, Lingling ZHANG, Zebang HUANG. Corrosion Behavior of Pure Zinc in Simulated Underground Seawater Infiltrated Saline-alkali Soils[J]. Journal of Chinese Society for Corrosion and protection, 2026, 46(3): 864-874.

全文: PDF(23825 KB) HTML

摘要:

通过室内埋片腐蚀实验研究了Zn在不同模拟地下海水含量土壤中的腐蚀行为。采用SEM和XRD分析了腐蚀产物形貌和物相组成，基于灰色关联度和相关性分析探究了Zn在添加3.5%NaCl溶液的土壤中与天然海水的土壤中腐蚀数据的关联性。结果表明，盐碱土中在含去离子水、3.5%NaCl溶液以及天然海水量均低于20%时Zn的腐蚀速率随土壤中溶液含量增加而增加，在含去离子水、3.5%NaCl溶液以及天然海水量均为20%时达到峰值分别为0.121，1.094和1.152 g·cm^-2·a^-1，在含去离子水、3.5%NaCl溶液以及天然海水量均高于20%时随各自溶液含量增加而减小；Zn在3.5%NaCl溶液与天然海水含量均为10%~50%的土壤中的腐蚀产物疏松，保护性差，其腐蚀产物主要为ZnO、Zn(OH)₂和Zn₅(OH)₈Cl₂·H₂O，在添加天然海水的土壤中腐蚀产物还有少量ZnS。Zn在上述两种土壤中随着NaCl溶液与海水含量增加，腐蚀形态均由局部腐蚀转变为全面腐蚀。Zn在上述两种土壤中腐蚀数据之间具有较高灰色关联度γ (0.683~0.869)和较强相关性(R² = 0.989)，实验室采用3.5%NaCl溶液模拟海水加入土壤中可预测沿海地区金属土壤腐蚀行为。

关键词 ：纯锌, 盐碱土, 土壤腐蚀, 地下海水, 灰色关联度, 相关性

Abstract：

In the article, the corrosion behavior of Zn-plate in saline-alkali soils with different underground seawater contents was assessed via a laboratory simulation where Zn-plates were buried in the designed soils. Then the morphology and phase composition of the corrosion products were characterized by means of SEM + EDS and XRD. Meanwhile the correlation between the acquired corrosion data of Zn in soils with 3.5%NaCl solution and with natural seawater soil was explored by using gray correlation and correlation analysis. The results indicate that when the salt-alkali soil contains various aqueous solutions such as deionized water, 3.5%NaCl solution, and natural seawater respectively while their contents all being less than 20%, the corrosion rate of Zn in the saline-alkali soils increases as the contents of each solution in the soil increase; when their contents are exactly 20%, the corrosion rate of Zn reaches its peak: i.e. 0.121, 1.094 and 1.152 g·cm^-2·a^-1, respectively; when the contents of all the three solutions are higher than 20%, the corrosion rate of Zn decreases as the content of each solution increases. When in soils with contents of 3.5%NaCl solution and natural seawater content ranging respectively from 10% to 50% the generated corrosion products on Zn surface are mainly ZnO, Zn(OH)₂, and Zn₅(OH)₈Cl₂·H₂O, which are loose with poor protectiveness. Besides, in soils with natural seawater, there was also a small amount of ZnS in the corrosion products. In soils contents both NaCl solution and natural seawater, the corrosion morphology of Zn transitions from localized corrosion to general corrosion with the increasing content of the two waters. The corrosion data for Zn in the above two types of soil exhibit high gray correlation coefficients (γ = 0.683-0.869) and strong correlations (R² = 0.989). Therefore, using 3.5%NaCl solution instead of seawater for the infiltration of saline-alkali soil may be a very effective method to simulate and predict the soil induced corrosion behavior of metals in coastal areas.

Key words： pure zinc saline-alkali soil soil corrosion underground seawater grey correlation correlation

收稿日期: 2025-08-05 32134.14.1005.4537.2025.250

ZTFLH:

TG172.4

基金资助:国家自然科学基金(51961028)

通讯作者: 刘光明，E-mail：gemliu@126.com，研究方向为材料的腐蚀与防护

Corresponding author: LIU Guangming, E-mail: gemliu@126.com

作者简介: 刘晨辉，男，1999年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2025.250 或 https://www.jcscp.org/CN/Y2026/V46/I3/864

图1 截面样品示意图

图2 土壤中含不同量去离子水、L溶液、H溶液时Zn试片埋置在土壤中20 d的腐蚀速率

图3 土壤中含不同量L溶液、H溶液时Zn试片埋置在土壤中20 d的失重动力学曲线

图4 土壤中含不同量L溶液、H溶液时Zn试片埋置在土壤中20 d的腐蚀产物XRD图谱

图5 土壤中含不同量L溶液、H溶液时Zn试片埋置在土壤中20 d后表面宏观形貌

图6 土壤中含不同量L溶液、H溶液时Zn试片埋置在土壤中20 d后的表面微观形貌

图7 土壤中L溶液和H溶液含量均为20%时Zn试片埋设在土壤中20 d的截面形貌及EDS能谱图

表1 Zn在不同L溶液、H溶液含量的土壤中失重动力学灰色关联度计算结果

图8 Zn在不同L溶液含量与不同H溶液含量的土壤中腐蚀20 d的腐蚀速率相关性比较图

图9 Zn在不同L溶液含量与不同H溶液含量的土壤中腐蚀机理模型

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