海洋环境下单组分碱激发涂层防腐性能的研究

孙雅茹; SUN Yaru; 杨世界; YANG Shijie; 孔令旭; KONG Lingxu; 李晓易; LI Xiaoyi; 孔丽娟; KONG Lijuan

doi:10.48014/ems.20251225001

海洋环境下单组分碱激发涂层防腐性能的研究

Study on the Anti-Corrosion Performance of a Single-Component Alkali-Activated Coating in Marine Environments

工程材料与结构 2026年第5卷第1期页码[5-15] 下载全文[5.9MB] [HTML]

摘要

涂层防护是提升海洋工程结构耐久性最有效的手段之一。为了解决海洋环境中钢筋混凝土结构的腐蚀问题, 特别是在飞溅区, 本研究开发了一种新型的单组分碱活化防腐涂料。该涂料以粒状高炉渣、粉煤灰、偏高岭土、赤泥为前驱体, 配以固体碱活化剂。为克服传统碱活化材料脆性高、亲水性强、使用不便等缺点, 采用苯乙烯-丙烯酸乳液、聚二甲基硅氧烷、聚乙烯醇纤维和海泡石对涂层进行协同改性。通过对疏水性、硬度、结合强度的测试, 选择最佳配比。随后, 通过模拟海洋环境的加速腐蚀试验评估了该涂层的防腐性能, 并将开发的涂层与环氧涂层、水泥基涂层和双组分碱活化涂层进行了比较。并采用扫描电镜和能谱分析腐蚀前后的组分变化。结果表明, 优化后的涂层具有优异的综合性能, 达到超疏水状态, 水接触角达到160°, 结合强度提高到2. 65MPa。在经历45个干湿循环后, 涂覆在混凝土及钢筋表面的单组分碱激发涂层均未出现明显的剥落和锈蚀, 形态完整, 且氯离子渗透深度仅为4. 2mm, 低于环氧树脂涂层 (5. 1mm) 和水泥基涂层 (6. 7mm) , 但高于双组分碱激发涂层 (3. 5mm) 。微观结构分析显示, 双组分碱激发涂层和单组分碱激发涂层界面致密、缺陷少, 表现出优异的抗氯离子侵入能力与耐干湿循环腐蚀性能。尽管后者的耐腐蚀性能在一定程度上低于前者, 但其施工简便、成本低、工期短, 应用潜力巨大。总的来说, 单组分碱激发涂层可为海洋工程防护的绿色和功能化提供新的技术路径, 具有良好的工程应用前景。

Abstract

Coating protection is one of the most effective approaches to enhance the durability of marine engineering structures. To address the corrosion of reinforced concrete structures in marine environments, particularly in the splash zone, this study developed a novel single-component alkali-activated anti-corrosion coating. The coating was formulated using granulated blast furnace slag, fly ash, metakaolin, and red mud as precursors, along with a solid alkali activator. To overcome the drawbacks of traditional alkali-activated materials—such as high brittleness, strong hydrophilicity, and inconvenient application—the coating was synergistically modified with styrene-acrylic emulsion, polydimethylsiloxane, polyvinyl alcohol fibers, and sepiolite. The optimal formulation was determined through testing of hydrophobicity, hardness, and bond strength. Subsequently, the anti-corrosion performance of the coating was assessed through accelerated corrosion tests simulating marine environments, and the developed coating was further compared with epoxy coatings, cement-based coatings, and two-component alkali-activated coatings. Scanning electron microscopy and energy-dispersive spectroscopy was employed to analyze compositional changes before and after corrosion. The results indicate that the optimized coating exhibits excellent comprehensive performance, achieving a superhydrophobic state with a water contact angle of up to 160° and a bond strength of 2. 65MPa. After 45 dry-wet cycles, the single-component alkali-activated coating applied to both concrete and reinforcing steel surfaces showed no significant peeling or corrosion, maintaining its integrity. The chloride ion penetration depth was only 4. 2mm, which is lower than that of epoxy coatings (5. 1mm) and cement-based coatings (6. 7mm) , but higher than that of two-component alkali-activated coatings (3. 5 mm) . Microstructural analyses reveal that both single-component and two-component alkali-activated coatings possess dense interfaces with few defects, resulting in superior resistance to chloride ingress and dry-wet cyclic corrosion. Although the corrosion resistance of the single-component coating is somewhat lower than that of the two-component coating, its advantages in terms of simple application, low cost, and short construction period highlight its significant application potential. Overall, the single-component alkali-activated coating provides a new technical pathway for the green and functional protection of marine engineering and demonstrates considerable prospects for engineering applications.

DOI

10.48014/ems.20251225001

文章类型

研究性论文

收稿日期

2025-12-25

接收日期

2025-12-30

出版日期

2026-03-28

关键词

海洋工程, 干湿循环, 单组分碱激发剂, 涂层, 改性, 防腐性

Keywords

Marine engineering, dry-wet cycle, single-component alkali activator, coating, modification, anticorrosion performance

作者

孙雅茹¹, 杨世界², 孔令旭¹, 李晓易¹, 孔丽娟^1,*

Author

SUN Yaru¹, YANG Shijie², KONG Lingxu¹, LI Xiaoyi¹, KONG Lijuan^1,*

所在单位

1. 石家庄铁道大学材料科学与工程学院, 石家庄 050043
2. 石家庄铁道大学土木工程学院, 石家庄 050043

Company

1. School of Materials Science and Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
2. School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China

浏览量

164

下载量

265

基金项目

本研究得到了河北省自然科学基金(资助号E2025210180)的资助。

参考文献

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引用本文

孙雅茹, 杨世界, 孔令旭, 等. 海洋环境下单组分碱激发涂层防腐性能的研究[J]. 工程材料与结构, 2026, 5(1): 5-15.

Citation

SUN Yaru, YANG Shijie, KONG Lingxu, et al. Study on the anti-corrosion performance of a single- component alkali-activated coating in marine environments[J]. Engineering Materials and Structures 2026, 5(1): 5-15.