Qu Zuopeng, Wang Lei, Tang Hongyu, Ye Huaiyu, Li Meicheng
National Engineering Laboratory for Biomass Power Generation Equipment, School of Renewable Energy, North China Electric Power University, Beijing 102206, China.
Delft Institute of Microsystems and Nanoelectronics, Delft University of Technology, 2628 CD Delft, The Netherlands.
Nanomaterials (Basel). 2019 Jun 30;9(7):956. doi: 10.3390/nano9070956.
In this paper, four composite coatings of nano-SnS/polyvinylbutyral (PVB), nano-MoS/PVB, nano-SnS-Zn/PVB, and nano-MoS-Zn/PVB were prepared, and their anti-corrosion mechanism was analyzed by experimental and theoretical calculations. The results of the electrochemical experiments show that the effect of nano-MoS on the corrosion protection performance of PVB coating is better than that of nano-SnS in 3% NaCl solution, and that the addition of Zn further enhances this effect, which is consistent with the results of weight loss measurements. Furthermore, the observation of the corrosion matrix by the field emission scanning electron microscope (FESEM) further confirmed the above conclusion. At last, the molecular dynamics (MD) simulation were carried out to investigate the anti-corrosion mechanism of the nanofillers/PVB composites for the copper surface. The results show that both nano-SnS and nano-MoS are adsorbed strongly on the copper surface, and the binding energy of nano-MoS is larger than that of nano-SnS.
本文制备了纳米SnS/聚乙烯醇缩丁醛（PVB）、纳米MoS/PVB、纳米SnS-Zn/PVB和纳米MoS-Zn/PVB四种复合涂层，并通过实验和理论计算分析了它们的防腐机理。电化学实验结果表明，在3% NaCl溶液中，纳米MoS对PVB涂层防腐性能的影响优于纳米SnS，且Zn的加入进一步增强了这种效果，这与失重测量结果一致。此外，用场发射扫描电子显微镜（FESEM）对腐蚀基体的观察进一步证实了上述结论。最后，进行了分子动力学（MD）模拟以研究纳米填料/PVB复合材料对铜表面的防腐机理。结果表明，纳米SnS和纳米MoS均强烈吸附在铜表面，且纳米MoS的结合能大于纳米SnS。
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