铝合金超双疏表面的制备及其耐蚀性研究

doi:10.11902/1005.4537.2021.339

中国腐蚀与防护学报

2022, Vol. 42

Issue (6): 966-972 DOI: 10.11902/1005.4537.2021.339

研究报告

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铝合金超双疏表面的制备及其耐蚀性研究

李育桥, 司伟婷, 高荣杰(

)

中国海洋大学材料科学与工程学院青岛 266100

Preparation of Superamphiphobic Surface on Al-alloy and Its Corrosion Resistance

LI Yuqiao, SI Weiting, GAO Rongjie(

)

School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China

引用本文:

李育桥, 司伟婷, 高荣杰. 铝合金超双疏表面的制备及其耐蚀性研究[J]. 中国腐蚀与防护学报, 2022, 42(6): 966-972.
Yuqiao LI, Weiting SI, Rongjie GAO. Preparation of Superamphiphobic Surface on Al-alloy and Its Corrosion Resistance[J]. Journal of Chinese Society for Corrosion and protection, 2022, 42(6): 966-972.

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摘要:

采用盐溶液刻蚀和水浴处理的方法,结合氟硅烷的表面修饰,在5083铝合金基体上制备出了超双疏表面。采用场发射扫描电子显微镜 (FE-SEM)、X射线衍射 (XRD)、X射线光电子能谱 (XPS)、接触角测量和电化学测试等方法研究了超双疏铝合金表面的微观形貌、化学成分、疏水疏油性和耐蚀性。结果表明,水和乙二醇在该表面上的接触角分别为 158°和154.3°,展现出良好的超双疏性能；与基体相比,超双疏试样的腐蚀电位明显正移,腐蚀电流密度由4.016×10^-6 A·cm^-2下降至1.531×10^-7 A·cm^-2；在3.5% (质量分数) NaCl溶液中浸泡5 d后,超双疏试样的电荷转移电阻仍明显高于基体,提高了5083铝合金基体的耐蚀性。

关键词 ：铝合金, 刻蚀, 超双疏表面, 耐蚀性

Abstract：

Superamphiphobic surface film was prepared on 5083 Al-alloy substrate by using chemical etching and then finishing in an ethanol solution of perfluorodecyl triethoxysilane. Its microscopic morphology, chemical composition, superamphiphobicity and corrosion resistance were characterized by means of field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), contact angle measurements and electrochemical tests. The results showed that the contact angles of water and ethylene glycol on the surface were 158° and 154.3°, respectively, exhibiting good superamphiphobicity. In comparison with the bare alloy, the free corrosion potential of the 5083 Al-alloy with superamphiphobic surface film exhibited significantly positive shift, while the corrosion current decreased from 4.016×10^-6 A·cm^-2 to 1.531×10^-7 A·cm^-2; after immersing in 3.5% (mass fraction) NaCl solution for 5 d, the charge transfer resistance of the alloy with superamphiphobic surface film was still significantly higher than that of the bare alloy, it follows that the superamphiphobic surface finishing can enhance the corrosion resistance of 5083 Al-alloy substrate.

Key words： Al-alloy chemical etching superamphiphobic surface anti-corrosion

收稿日期: 2021-11-26

ZTFLH:

TG174.4

基金资助:国家自然科学基金山东省联合基金(U1706221)

作者简介: 李育桥,女,1996年生,硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2021.339 或 https://www.jcscp.org/CN/Y2022/V42/I6/966

图1 超双疏表面的制备流程

图2 不同处理方法下试样的表面形貌

图3 水滴和乙二醇在基体和超双疏表面的光学图像

图4 同处理方式后试样表面的 XRD 图谱

图5 硅烷修饰前试样的XPS谱图

图6 氟硅烷修饰后试样的XPS图谱

图7 基体和超双疏试样的动电位极化曲线

表1 动电位极化曲线拟合参数

图8 基体和不同浸泡时间下超双疏试样的Nyquist图

图9 基体和超双疏试样的等效电路图

表2 基体和不同浸泡时间下超双疏试样的电路拟合参数

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