Redkina Galina V, Sergienko Alexandra S, Kuznetsov Yurii I, Grafov Oleg Yu
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospect 31-4, 119071 Moscow, Russia.
Materials (Basel). 2022 Aug 4;15(15):5360. doi: 10.3390/ma15155360.
The composition, structure, and protective and hydrophobic properties of nanoscale films formed layer-by-layer in solutions of sodium dodecylphosphonate (SDDP) and vinyltrimethoxysilane or -octyltriethoxysilane (OTES) on the zinc surface with different morphologies were studied by SEM, XPS, water contact angle measurements, and electrochemical and corrosion tests. The protective, hydrophobic properties of phosphonate-siloxane films on zinc and their stability in a corrosive media are determined both by the initial surface morphology and composition of the surface oxide layer, and by the nature of inhibitors. It was shown that preliminary laser texturing of the zinc surface is preferable than chemical etching to enhance the anticorrosive properties of the resulting thin films. The most stable films with excellent superhydrophobic and protective properties in atmospheres of high humidity and salt spray are formed on the zinc surface with fractal morphology during layer-by-layer passivation with SDDP and OTES.
通过扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、水接触角测量以及电化学和腐蚀测试，研究了在具有不同形貌的锌表面上，由十二烷基膦酸钠（SDDP）与乙烯基三甲氧基硅烷或辛基三乙氧基硅烷（OTES）在溶液中逐层形成的纳米级薄膜的组成、结构、保护和疏水性能。锌表面上膦酸酯-硅氧烷薄膜的保护、疏水性能及其在腐蚀介质中的稳定性，既取决于初始表面形貌和表面氧化层的组成，也取决于抑制剂的性质。结果表明，为增强所得薄膜的防腐性能，锌表面的预激光纹理化比化学蚀刻更可取。在用SDDP和OTES逐层钝化过程中，在具有分形形貌的锌表面上形成了在高湿度和盐雾气氛中具有优异超疏水和保护性能的最稳定薄膜。
