Ding Xuhai,Hou Jihao,Wei Qianzhu,et al.Biomimetic coating based on electrodeposited nanowall structure and its anti-corrosion and anti-biofouling in seawater[J].Plating & Finishing,2023,(7):33-42.[doi:10.3969/j.issn.1001-3849.2023.07.005]
电沉积纳米墙仿生结构涂层及其海水防腐防污研究
- Title:
- Biomimetic coating based on electrodeposited nanowall structure and its anti-corrosion and anti-biofouling in seawater
- Keywords:
- biomimetics ; copper ; superhydrophobic coating ; electrodeposition ; marine corrosion ; biofouling ; anti-icing
- 分类号:
- TG174
- 文献标志码:
- A
- 摘要:
- 针对铜的海水腐蚀和生物污损问题，采用一步电化学沉积法在紫铜表面制备了基于纳米墙形貌的超疏水涂层（ SHS ），通过将稳定的油相替代 SHS 涂层中不稳定的空气膜，得到超滑涂层（ SLIPS ）。所制备的 SHS 静态接触角为 165 o ，表现出优良的超疏水性能。在 3.5 wt.% NaCl 水溶液中，裸铜以及 SLIPS 的自腐蚀电流密度分别为 1.08×10 -6 mA/cm 2 和 2.98×10 -9 mA/cm 2 ，表明 SLIPS 具有耐海水腐蚀性能；经过 6 d 浸泡后， SLIPS 的阻抗模值仍比裸铜高，说明该涂层对紫铜具有长效防腐蚀作用。以硅藻作为目标污损生物，在硅藻悬浊液浸泡 3 d 后，裸铜、 SHS 、 SLIPS 表面生物附着密度分别为 4.56×10 5 cells/cm 2 、 4.13×10 4 cells/cm 2 、 3.59×10 3 cells/cm 2 ， SLIPS 表面附着的生物量较裸铜表面显著减少，表明 SLIPS 具有良好的防生物污损能力。在裸铜、 SHS 、 SLIPS 表面冰的黏附强度分别为 127 kPa 、 56 kPa 和 19 kPa ，超滑表面与冰的黏附力最小且远低于铜表面，说明超滑表面具有良好的防结冰性能。
- Abstract:
- ： Aiming at the problem of seawater corrosion and biofouling of copper ， a superhydrophobic coating （ SHS ） based on nanowall morphology was prepared on the surface of copper by one-step electrochemical deposition. By replacing the unstable air film in the SHS coating with a stable oil phase ， a slippery liquid-infused porous surface （ SLIPS ） was obtained. The prepared SHS has a static contact angle of 165 o ， showing excellent superhydrophobic properties. In 3.5 wt.% NaCl aqueous solution ， the self-corrosion current densities of bare copper and SLIPS are 1.08×10 -6 mA /cm 2 and 2.98×10 -9 mA /cm 2 ， respectively ， indicating that SLIPS has seawater corrosion resistance. After 6 days of immersion ， the impedance modulus of SLIPS is still higher than that of bare copper ， indicating that the coating has a long-term anti-corrosion effect on copper. The diatom was used as the target fouling organism. After soaking in diatom suspension for 3 days ， the bio-adhesion density on the surface of bare copper ， SHS and SLIPS was 4.56×10 5 cells/cm 2 ， 4.13×10 4 cells/cm 2 and 3.59×10 3 cells/cm 2 ， respectively. The biomass attached to the surface of SLIPS was significantly lower than that to the surface of bare copper ， indicating that SLIPS has good anti-biofouling ability. The adhesion strength of ice on bare copper ， SHS and SLIPS surfaces is 127 kPa ， 56 kPa and 19 kPa ， respectively. The adhesion force between SLIPS and ice is the smallest and much lower than that of copper surface ， indicating that SLIPS has good anti-icing performance.
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备注/Memo
收稿日期： 2023-01-16 修回日期： 2023-02-23 作者简介： 丁序海（ 1972 —）男，高级工程师，从事恶劣环境中材料的腐蚀防护研究工作， email ： 17150262@ceic.com * 通信作者： 于溢禛， email ： cyszyyz@163.com 基金项目： 国家自然科学基金资助项目（ 52074172 ）