AM60镁合金超疏水表面制备及防腐蚀性能的研究

doi:10.11902/1005.4537.2021.088

中国腐蚀与防护学报

2022, Vol. 42

Issue (2): 301-308 DOI: 10.11902/1005.4537.2021.088

研究报告

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AM60镁合金超疏水表面制备及防腐蚀性能的研究

代卫丽¹^,²(

), 王景行¹, 罗帅¹, 杜宁¹, 刘凡¹, 胥立栋¹, 张俊¹, 宋月红¹^,², 刘彦峰¹^,²^,³

^1.商洛学院陕西省尾矿资源综合利用重点实验室商洛 726000
^2.商洛学院陕西省矿产资源清洁高效转化与新材料工程研究中心商洛 726000
^3.西安理工大学材料科学与工程学院西安 710048

Fabrication of Super-hydrophobic Surface on AM60 Mg-alloy and Its Corrosion Resistance

DAI Weili¹^,²(

), WANG Jinghang¹, LUO Shuai¹, DU Ning¹, LIU Fan¹, XU Lidong¹, ZHANG Jun¹, SONG Yuehong¹^,², LIU Yanfeng¹^,²^,³

^1.Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo University, Shangluo 726000, China
^2.Shaanxi Engineering Research Center for Mineral Resources Clean & Efficient Conversion and New Materials, Shangluo University, Shangluo 726000, China
^3.School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China

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摘要:

通过化学刻蚀，以硬脂酸为修饰剂，成功实现AM60镁合金表面的超疏水改性，并采用扫描电镜、接触角仪、电化学工作站等对处理前后的AM60镁合金表面的微观形貌、疏水性能和耐腐蚀性能进行分析。结果表明：AM60镁合金仅经盐酸刻蚀处理后，表现为超亲水性，再经硬脂酸浸泡后才达到疏水的效果；随着硬脂酸浸泡时间的增加，该合金的表面接触角呈现先增加后减小的趋势，在浸泡12 h时，接触角最大为150.18°，滚动角小于10°，此时合金表面具有超疏水性能；同时，相比于未处理的AM60镁合金而言，超疏水改性后样品的腐蚀电流密度降低了88.19%，腐蚀电压提高了19.72%，耐腐蚀性能得到明显改善；而且，超疏水改性还可提高合金对粉尘和水溶液的自清洁性能。

关键词 ： AM60镁合金, 化学刻蚀, 疏水性, 耐蚀性, 自清洁

Abstract：

The hydrophobic surface film on AM60 Mg-alloy was prepared by chemical etching, and then soaking in stearic acid ethanol solution. The microstructure, hydrophobic properties and corrosion resistance of hydrophobic surface were characterized by means of scanning electron microscope, contact angle tester and electrochemical workstation. The results showed that the AM60 Mg-alloy was super hydrophilic after etching with hydrochloric acid. When the etching time was 25 min, the contact angle reached a maximum value, which was 125% higher than that of the untreated surface. With the increase of soaking time in the stearic acid ethanol solution, the contact angle increases first and then decreases. When soaked for 12 h, the contact angle reaches the maximum of 150.18° and the rolling angle is less than 10°. At this time, the hydrophobic film presents a micro/nano rough surface with low-surface energy, which have superior hydrophobic properties. The hydrophobic AM60 Mg-alloy has good corrosion resistance, and its corrosion current density is 88.19% lower than that of untreated matrix material, and the corresponding corrosion voltage is 19.72% higher, which significantly improves the corrosion resistance of the AM60 Mg-alloy. At the same time, the treated AM60 Mg-alloy has also good self-cleaning performance to dust and aqueous solution.

Key words： AM60 Mg-alloy chemical etching super-hydrophobic corrosion resistance self-cleaning

收稿日期: 2021-04-20

ZTFLH:

TG17

基金资助:陕西省自然科学基础研究计划(2019JQ-156);陕西省教育厅重点科研计划(19JS026);商洛市高性能有色金属制备与;加工技术创新团队(SK2019-75);商洛学院博士科研项目(17SKY019)

通讯作者: 代卫丽 E-mail: dweili@126.com

Corresponding author: DAI Weili E-mail: dweili@126.com

作者简介: 代卫丽，女，1981年生，博士，讲师

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引用本文:

代卫丽, 王景行, 罗帅, 杜宁, 刘凡, 胥立栋, 张俊, 宋月红, 刘彦峰. AM60镁合金超疏水表面制备及防腐蚀性能的研究[J]. 中国腐蚀与防护学报, 2022, 42(2): 301-308.
Weili DAI, Jinghang WANG, Shuai LUO, Ning DU, Fan LIU, Lidong XU, Jun ZHANG, Yuehong SONG, Yanfeng LIU. Fabrication of Super-hydrophobic Surface on AM60 Mg-alloy and Its Corrosion Resistance. Journal of Chinese Society for Corrosion and protection, 2022, 42(2): 301-308.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.088 或 https://www.jcscp.org/CN/Y2022/V42/I2/301

图1 AM60表面改性前后的XRD谱

图2 不同处理状态的AM60镁合金的Raman光谱分析

图3 经不同方法表面处理后的AM60镁合金SEM形貌及对应的接触角

图4 硬脂酸浸泡时间对表面接触角的影响

图5 盐酸刻蚀25 min然后硬脂酸浸泡不同时间的试样表面SEM形貌及对应接触角

图6 不同表面的液滴接触角的Cassie模型示意图

图7 未经和经过疏水处理、盐酸刻蚀的AM60镁合金试样在3.5%NaCl溶液中的电化学极化曲线

表1 未经和经过超疏水处理、盐酸刻蚀的AM60镁合金试样的腐蚀电流密度和腐蚀电位

图8 经3.5%NaCl浸泡之后的AM60镁合金的SEM像

图9 具有疏水表面AM60镁合金对粉尘和溶液的自清洁效果照片

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