Mureşan Alina Crina, Buruiană Daniela Laura, Istrate Gina Genoveva, Pintilie Ştefan Cătălin
Interdisciplinary Research Center in the Field of Eco-Nano Technology and Advanced Materials (CC-ITI), Faculty of Engineering, Dunarea de Jos University of Galati, 47 Domneasca Street, 800008 Galati, Romania.
Cross-Border Faculty, Department of Applied Sciences, Dunarea de Jos University of Galati, 47 Domneasca Street, 800008 Galati, Romania.
Materials (Basel). 2021 Apr 15;14(8):1991. doi: 10.3390/ma14081991.
The paper presents the morphology, topography and corrosion behavior of epoxy resin/zinc hybrid coatings obtained by electrodeposition from zinc sulphate electrolyte. The effect of current density and mean diameter size of polymer particles used for electrodeposition of the epoxy resin/zinc coatings on the morphology, topography and roughness of the surfaces were investigated by Scanning Electron Microscopy and Atomic Force Microscopy. The corrosion behavior of the hybrid coatings in 0.5 M sodium chloride solution was evaluated using electrochemical methods. For microbiological corrosion, the effect of sulphate reducing bacteria (SRB) on the surfaces was evaluated using epifluorescence microscopy. The surface roughness before and after bacteria attachment was evaluated using Atomic force microscopy. Polymer particles provide an influence in restricting the growth of zinc crystals as well as a catalytic role in nucleation sites increase. The results of electrochemical tests indicate a very good corrosion resistance of hybrid coatings comparing with zinc coatings. Epifluorescence images demonstrate that hybrid coating surfaces are slightly attacked by sulphate reducing bacteria.
本文介绍了通过硫酸锌电解液电沉积获得的环氧树脂/锌复合涂层的形态、形貌和腐蚀行为。采用扫描电子显微镜和原子力显微镜研究了用于环氧树脂/锌涂层电沉积的电流密度和聚合物颗粒平均直径大小对表面形态、形貌和粗糙度的影响。使用电化学方法评估了复合涂层在0.5 M氯化钠溶液中的腐蚀行为。对于微生物腐蚀，使用落射荧光显微镜评估了硫酸盐还原菌（SRB）对表面的影响。使用原子力显微镜评估了细菌附着前后的表面粗糙度。聚合物颗粒在限制锌晶体生长方面具有影响，并且在增加成核位点方面具有催化作用。电化学测试结果表明，与锌涂层相比，复合涂层具有非常好的耐腐蚀性。落射荧光图像表明，复合涂层表面受到硫酸盐还原菌的轻微侵蚀。
