王九华,郑大江,宋光铃.钢铁表面超疏水复合涂层的制备及其耐蚀性能研究[J].表面技术,2018,47(10):165-171.
WANG Jiu-hua,ZHENG Da-jiang,SONG Guang-Ling.Preparation and Corrosion Resistance of Superhydrophobic Composite Coating on Steel Surface[J].Surface Technology,2018,47(10):165-171
钢铁表面超疏水复合涂层的制备及其耐蚀性能研究
Preparation and Corrosion Resistance of Superhydrophobic Composite Coating on Steel Surface
投稿时间:2018-07-08  修订日期:2018-10-20
DOI:10.16490/j.cnki.issn.1001-3660.2018.10.022
中文关键词:  超疏水  微纳结构  两步法  电沉积  牺牲阳极  腐蚀
英文关键词:superhydrophobicity  micro/nanostructure  two-step method  electrodeposition  sacrificial anode  corrosion
基金项目:国家重点研发计划(2017YFB0702100)
作者单位
王九华 厦门大学 材料学院,厦门 361005 
郑大江 厦门大学 材料学院,厦门 361005 
宋光铃 厦门大学 材料学院,厦门 361005 
AuthorInstitution
WANG Jiu-hua College of Materials, Xiamen University, Xiamen 361005, China 
ZHENG Da-jiang College of Materials, Xiamen University, Xiamen 361005, China 
SONG Guang-Ling College of Materials, Xiamen University, Xiamen 361005, China 
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中文摘要:
      目的 在钢铁表面制备超疏水复合涂层,提高其耐蚀性能。方法 利用两步法,将45#钢片放在简单的镀锌溶液中(40 g/L ZnCl2,200 g/L KCl,20 g/L HBO3)进行直流电沉积,调节电沉积时间和电流密度,在钢片表面获得具有一定结构差异的镀锌层,然后使用0.05 mol/L的硬脂酸改性得到复合涂层。测试该涂层与水的接触角,使用SEM、XRD和FT-IR等技术对它们的形貌和化学组成进行表征和分析,通过测试极化曲线评价涂层的耐蚀性能。结果 随电沉积时间的延长和电流密度的增大,45#钢表面水的接触角先升高后降低。当电流密度为6 A/dm2,电沉积时间为20 min时,在钢片表面成功获得团簇颗粒状的微纳结构镀锌层,平均颗粒大小<20 μm,镀层厚度为40~50 μm。改性之后得到具有超疏水性能的复合涂层,水的接触角达155.4?,复合涂层的自腐蚀电流密度降低了一个数量级。结论 通过调节电沉积时间和电流密度可以在简单的镀锌溶液中制备得到具有微纳粗糙结构的锌镀层,经改性后获得具有超疏水性能的复合涂层。该复合涂层兼具牺牲阳极和超疏水性能,耐蚀性得到有效提高,可保护钢铁基体。
英文摘要:
      The work aims topreparesuperhydrophobic composite coating on steel surface andimprove its corrosion resistance. The two-step method was used to put the 45# steel sheet in a simple galvanized solution (40 g/L ZnCl2, 200 g/L KCl and 20 g/L HBO3) for direct current electrodeposition. The electrodeposition time and current density were adjusted to obtain zinc coatings with certain structural difference on the surface of the steel sheet. Then the composite coating was obtained by the stearic acid of 0.05 mol/L through modification. The water contact angle of the coating was tested. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) were employed to investigate the morphology and chemical composition of the coating. The corrosion resistance of the coating was evaluated by testing the polarization curve. The water contact angle of the surface of 45# steel increased first and then decreasedwith the extension of electrodeposition time and increase of current density. When the current density was 6 A/dm2 and the electrodeposition time was 20 min, the micro/nano structure galvanized layer on the steel sheet was successfully obtained. The average particle size was < 20 μm, the thickness of the coating was 40~50 μm. The hydrophobic coating obtained after modification hadthe water contact angle of 155.4 degrees, and the self-corrosion current density of the composite coating wasreduced by an order of magnitude. The zinc coating with micro/nano roughness structure can be prepared in a simple galvanized solution by adjusting the electrodeposition time and current density. The composite coating with super hydrophobic properties is obtained after modification. The composite coating has both sacrificial anode and superhydrophobic properties and can effectively improve the corrosion resistance of the coating and protect the steel.
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