超疏水涂层表面黏附性能对海洋防腐和抑制海洋微生物附着行为的影响

目前关于超疏水涂层表面黏附性能对其腐蚀性能和表面细菌行为的影响不甚清楚.该文通过调控聚脲醛纳米颗粒比例,采用喷涂法在Q235钢表面制备了具有不同黏附性能的超疏水涂层,并研究了表面黏附性能对其防腐、抑菌行为的影响.电化学测试结果表明,滚动角<10°的低黏附超疏水涂层具有较大的电荷转移电阻和较低的腐蚀电流密度,其防腐能力显...

Effect of Water Adhesion of Superhydrophobic Coatings on Their Corrosion Resistance and Antibacterial Behaviors in the Simulated Marine Environments

Up till now, the effects of the water adhesion of superhydrophobic coating on its corrosion resistance and antibacterial behaviors are not clear. In this study, superhydrophobic coatings with different water adhesion were successfully fabricated by spraying paints with different percentages of poly (ureaformaldehyde) nanoparticles (PUF NPs) on the Q235 substrate. The electrochemical results showed the lowadhesion superhydrophobic coating with the sliding angle less than 10° exhibited higher charge transfer resistance and lower corrosion current density than the high-adhesion superhydrophobic coating with the sliding angle of 175°. It suggested that the low-adhesion superhydrophobic coatinghad better corrosion resistance compared to the high-adhesion superhydrophobic coating. The crystal violet staining result revealed that the superhydrophobic coatings with high-adhesion and low-adhesion both could significantly restrain the adhesion of P. aeruginosa compared to Q235 substrate, and the superhydrophobic coating with low-adhesion exhibits a more excellent antibacterial capability at the antibacterial rate of 70.3%.