CeVO4改性硅烷膜的耐蚀性能研究
Study on corrosion resistance of CeVO4 modified silane film
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- 引用格式:
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赵世雄,孙翠玲,卢涛,潘吉林,窦宝捷,林修洲.CeVO4改性硅烷膜的耐蚀性能研究[J].天然气与石油,2021,39(1):101-108.doi:10.3969/j.issn.1006-5539.2021.01.016
ZHAO Shixiong, SUN Cuiling, LU Tao, PAN Jilin, DOU Baojie, LIN Xiuzhou.Study on corrosion resistance of CeVO4 modified silane film[J].Natural Gas and Oil,2021,39(1):101-108.doi:10.3969/j.issn.1006-5539.2021.01.016
- DOI:
- 10.3969/j.issn.1006-5539.2021.01.016
- 作者:
- 赵世雄1，孙翠玲1，卢涛1，潘吉林2，窦宝捷1,3，林修洲1,3
ZHAO Shixiong1, SUN Cuiling1, LU Tao1, PAN Jilin2, DOU Baojie1,3, LIN Xiuzhou1,3
- 作者单位:
- 1. 四川轻化工大学材料科学与工程学院, 2. 四川成都土壤环境材料腐蚀国家野外科学观测研究站,3. 四川轻化工大学材料腐蚀与防护四川省重点实验室
1. College of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, China; 2. Sichuan Chengdu Soil Environment Material Corrosion National Observation and Research Station, Chengdu, Sichuan, 610062, China; 3. Material Corrosion and Protection Key Laboratory of Sichuan Province, Sichuan University of Science and Engineering, Zigong, Sichuan, 643000, China
- 关键词:
- 铝合金;硅烷;CeVO4;耐蚀性
Aluminum alloys; Silane; CeVO4; Corrosion resistance
- 摘要:
- 为了探究钒酸铈(CeVO4)在硅烷膜改性方面的可行性,并拓展其在腐蚀防护领域的应用，采用水热合成法制备不同结构的CeVO4,并将其添加至KH560硅烷溶液中,通过浸渍法在铝合金表面制备CeVO4改性硅烷膜。利用X射线衍射仪(XRD)、红外光谱(FT IR)技术、扫描电子显微镜(SEM)对CeVO4结构进行表征,采用电化学阻抗谱和极化曲线对硅烷膜的耐蚀性能进行研究,分别讨论不同添加量的CeVO4和不同含量乙二胺四乙酸二钠盐(EDTA)制备CeVO4对硅烷膜层耐蚀性能的影响。结果表明：不同含量的EDTA制备CeVO4具有不同的形貌结构与结晶度,当EDTA含量为 2.5 mmol 时,制备得到CeVO4结晶度最好,微观结构为纳米哑铃状,长度大约2 μm;不同结构的CeVO4能够提高硅烷膜层的耐蚀性能,其中,当EDTA含量为2.5 mmol,CeVO4添加量为100 mg/L时,改性硅烷膜层耐蚀性最好,其膜层低频阻抗模值高达4.181×106 Ω·cm2,腐蚀电流密度降至2.254×10-8 A·cm-2。研究结果对CeVO4在硅烷膜改性及腐蚀防护领域的研究具有一定的指导意义。
In order to study the feasibility of using CeVO4 in the modification of silane film, and to expand its application in the field of corrosion protection, cerium vanadate (CeVO4) with different structures were prepared by hydrothermal synthesis, and added to KH560 silane solution. CeVO4 modified silane film was prepared on the surface of aluminum alloy by dipping method. The structure of CeVO4 was characterized by X ray diffractometer (XRD), infrared spectroscopy (FT IR) technology, and scanning electron microscope (SEM). The corrosion resistance of the silane film was studied by electrochemical impedance spectroscopy and polarization curve. The effects of adding different amounts of CeVO4 and different contents of Ethylene Diamine Tetraacetic Acid (EDTA) in the preparation of CeVO4 on the corrosion resistance of silane films are discussed. The results show that CeVO4 prepared with different content of EDTA has different morphology and crystallinity. When the content of EDTA is 2.5 mmol, the prepared CeVO4 has the best crystallinity. The microstructure is nano dumbbell shaped and the length is about 2 μm. CeVO4 with different structure can improve the corrosion resistance of silane film. When the content of EDTA is 2.5 mmol and the added quantity of CeVO4 is 100 mg/L, the corrosion resistance of 100 mg/L CeVO4 2.5 modified silane film is the best. The low frequency impedance modulus of that film is up to 4.181×106 Ω·cm2, and the corrosion current density reduces to 2.254×10-8 A·cm-2. The result of the study provides valuable reference for the research of CeVO4 in the field of silane modification and corrosion protection.
