Xu Yiku, Ma Shuang, Fan Mingyuan, Zheng Hongbang, Chen Yongnan, Song Xuding, Hao Jianmin
School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China.
Key Laboratory of Road Construction Technology and Equipment, MOE, Chang'an University, Xi'an 710064, China.
Materials (Basel). 2019 Sep 29;12(19):3197. doi: 10.3390/ma12193197.
This work aims to improve the properties of aluminum foams including the mechanical properties and corrosion resistance by electrodepositing a SiC/TiN nanoparticles reinforced Ni-Mo coating on the substrate. The coatings were electrodeposited at different voltages, and the morphologies of the coating were detected by SEM (scanning electron microscope) to determine the most suitable voltage. We used XRD (x-ray diffraction) and TEM (transmission electron microscope) to analyze the structure of the coatings. The aluminum foams and the substrates on which the coatings were electrodeposited at a voltage of 6.0 V for different electrodeposition times were compressed on an MTS (an Electro-mechanical Universal Testing Machine) to detect the mechanical properties. The corrosion resistance before and after the electrodeposition experiment was also examined. The results showed that the coating effectively improved the mechanical properties. When the electrodeposition time was changed from 10 min to 40 min, the W of the aluminum foams increased from 0.852 J to 2.520 J and the increased from 1.06 MPa to 2.99 MPa. The corrosion resistance of the aluminum foams was significantly improved after being coated with the Ni-Mo-SiC-TiN nanocomposite coating. The self-corrosion potential, pitting potential, and potential for primary passivation were positively shifted by 294 mV, 99 mV, and 301 mV, respectively. The effect of nanoparticles on the corrosion resistance of the coatings is significant.
这项工作旨在通过在基体上电沉积SiC/TiN纳米颗粒增强的Ni-Mo涂层来改善泡沫铝的性能，包括力学性能和耐腐蚀性。在不同电压下电沉积涂层，并通过扫描电子显微镜（SEM）检测涂层的形貌，以确定最合适的电压。我们使用X射线衍射仪（XRD）和透射电子显微镜（TEM）分析涂层的结构。将在6.0 V电压下不同电沉积时间电沉积有涂层的泡沫铝及其基体在一台机电式万能试验机（MTS）上进行压缩，以检测力学性能。还考察了电沉积实验前后的耐腐蚀性。结果表明，该涂层有效地改善了力学性能。当电沉积时间从10分钟变为40分钟时，泡沫铝的W从0.852 J增加到2.520 J，并且从1.06 MPa增加到2.99 MPa。用Ni-Mo-SiC-TiN纳米复合涂层涂覆后，泡沫铝的耐腐蚀性显著提高。自腐蚀电位、点蚀电位和初次钝化电位分别正向移动了294 mV、99 mV和301 mV。纳米颗粒对涂层耐腐蚀性的影响显著。
