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中国腐蚀与防护学报  2014, Vol. 34 Issue (3): 257-264    DOI: 10.11902/1005.4537.2013.146
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溶胶-凝胶法制备超疏水性纳米复合防腐涂层
尹成勇, 李澄(), 彭晓燕, 王加余, 王艳慧, 郑顺丽, 李敏, 胡玮
南京航空航天大学材料科学与技术学院 南京 210016
Performance of Superhydrophobic Nano Complex Anti-corrosion Coating Fabricated by Sol-gel Technique
YIN Chengyong, LI Cheng(), PENG Xiaoyan, WANG Jiayu, WANG Yanhui, ZHENG Shunli, LI Min, HU Wei
College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
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摘要: 

通过溶胶-凝胶旋涂法在不锈钢基底上制备了具有超疏水性能的介孔碳复合SiO2涂层。通过TEM,SEM及静态接触角、电化学测试技术 (Tafel和EIS) 等对其结构、疏水性能和耐蚀性等进行表征。结果表明:在不锈钢基底上形成了乳突状形貌,水在涂层表面静态接触角达到163°。该超疏水性SiO2/介孔碳复合涂层具有优良的防腐性能。

关键词 超疏水溶胶-凝胶复合涂层防腐蚀    
Abstract

Superhydrophobic complex coatings of mesoporous carbon/silica on stainless steel were prepared by a sol-gel spin cast method. The morphologies, anticorrosion property and hydrophobicity of the coatings were characterizd by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM), electrochemical test technique-Tafel curve and electrochemical impedance spectroscopy, as well as water contact angle measurement (CA) respectively. The coatings exhibited varied surface morphologies with bump-like and nipple-like protrusions on the stainless steel substrate. The coatings had a high water contact angle larger than 163°, indicating its strong hydrophobicity. The corrosion current density of the superhydrophobic complex coating coated steel was 8 order of magnitude lower than the bare steel, while its charge transfer resistance (Rct) was 6 order of magnitude higher as well, implying an excellent corrosion protectiveness. Besides, an electrochemical equivalent circuit was proposed to interpret the relevant anti-corrosion mechanism for the superhydrophobic coatings.

Key wordssuperhydrophobic    sol-gel    complex coating    anticorrosion
收稿日期: 2013-08-12     
ZTFLH:  TG174.4  
基金资助:南航-中联科技电子新材料联合实验室基金项目资助
作者简介: null

尹成勇,男,1987年生,硕士生,研究方向为金属电化学腐蚀与防护

引用本文:

尹成勇, 李澄, 彭晓燕, 王加余, 王艳慧, 郑顺丽, 李敏, 胡玮. 溶胶-凝胶法制备超疏水性纳米复合防腐涂层[J]. 中国腐蚀与防护学报, 2014, 34(3): 257-264.
Chengyong YIN, Cheng LI, Xiaoyan PENG, Jiayu WANG, Yanhui WANG, Shunli ZHENG, Min LI, Wei HU. Performance of Superhydrophobic Nano Complex Anti-corrosion Coating Fabricated by Sol-gel Technique. Journal of Chinese Society for Corrosion and protection, 2014, 34(3): 257-264.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2013.146      或      https://www.jcscp.org/CN/Y2014/V34/I3/257

图1  
图2  
图3  
图4  
图5  
图6  
Sample Ecorr(vs SCE)
V
Icorr
Acm-2
Rcorr
Ωcm2
Bare stainless
steel
-0.651 9.563×10-5 5.316×102
Mesoporous
carbon coating
-0.431 1.760×10-6 2.929×104
SiO2/mesoporous
complex coating
-0.158 6.622×10-8 5.407×105
表1  不同试样的腐蚀电流密度、极化电阻和腐蚀电位的拟合结果
图7  
图8  
Sample Rs
Ωcm2
Q-Y
10-6Ω-1sncm-2
Q-n R
Ωcm2
W
10-5Ω-1s5cm-2
Qdl-Y0
10-6Ω-1sncm-2
Qd1-nd1 Rct
kΩcm2
Bare stainless steel 28.79 38.39 0.164 222 29.4 49.87 0.487 10.3
Mesoporous carbon coating 30.55 3.97 0.901 2746 --- 1.169 0.906 2547
SiO2/mesoporous carbon coating 25.32 1.48 0.64 3598 --- 0.106 0.943 7222
表2  3种试样在模拟腐蚀环境中的电化学阻抗分析结果
图9  
图10  
图11  
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