Zhang Fan, Yao Zhengjun, Zhang Shasha, Moliar Oleksandr, Zhang Zelei
College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics 29 Jiangjun Avenue Nanjing 211106 China.
Key Laboratory of Materials Preparation and Protection for Harsh Environment, Ministry of Industry and Information Technology Nanjing 210016 China.
RSC Adv. 2020 Jun 23;10(40):23842-23853. doi: 10.1039/d0ra03043k. eCollection 2020 Jun 19.
Nanocrystalline Co coatings were successfully prepared on the surface of a steel substrate by droplet contact electrodeposition. Area-selective electrodeposition is performed by electrolyte drops contacting the surface of the substrate. By analyzing the current-time curve during the preparation of the coating, the influence of the selected area deposition pattern on the current-time curve is summarized. Meanwhile, microscopic observation, phase composition analysis, and performance testing of the coating were performed. The results show that the control procedure and deposition method directly affect the organization, morphology, and quality of the coating. The limited electrodeposition area and its continuous movement increase the nucleation rate and limit the growth of crystal nuclei. Therefore, the area-selective electrodeposition method has great advantages in preparing nanocrystals. The nanocrystalline Co coating was prepared on the surface of a steel substrate, and the surface hardness and corrosion resistance were improved.
通过液滴接触电沉积法在钢基体表面成功制备了纳米晶钴涂层。区域选择性电沉积是通过电解液滴与基体表面接触来进行的。通过分析涂层制备过程中的电流-时间曲线，总结了选定区域沉积模式对电流-时间曲线的影响。同时，对涂层进行了微观观察、相组成分析和性能测试。结果表明，控制过程和沉积方法直接影响涂层的组织、形貌和质量。有限的电沉积区域及其连续移动提高了形核率并限制了晶核的生长。因此，区域选择性电沉积方法在制备纳米晶体方面具有很大优势。在钢基体表面制备了纳米晶钴涂层，提高了表面硬度和耐腐蚀性。
