ABSTRACT The influence of ultrasound agitation on the properties of electrodeposited Zn-Co coatings was analysed and compared with coatings deposited by using magnetic stirring. The morphology and chemical composition of the deposits were analysed by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy. X-ray diffraction was used in examining the crystallographic orientation and phase composition of the coatings. It was found that utilising ultrasound during deposition enhanced the compactness, homogeneity and corrosion resistance of the coatings compared to deposition with magnetic stirring of the plating solution. Magnetically stirred coatings were dendritic and porous, whereas coatings produced under ultrasound agitation were more homogeneous and dense. The higher the ultrasound intensity applied the higher the cobalt content in the coating. The corrosion resistance of Zn-Co coatings was improved by ultrasound agitation, with the best results obtained at 20 W cm−2 of ultrasound intensity.

中文翻译：

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超声波在电沉积过程中对锌钴合金涂层形貌和腐蚀稳定性的影响

摘要分析了超声搅拌对电沉积锌钴涂层性能的影响，并与使用磁力搅拌沉积的涂层进行了比较。通过扫描电子显微镜结合能量色散 X 射线光谱分析沉积物的形态和化学成分。X 射线衍射用于检查涂层的晶体取向和相组成。发现在沉积过程中使用超声波与用电镀溶液的磁力搅拌沉积相比提高了涂层的致密性、均匀性和耐腐蚀性。磁力搅拌涂层是树枝状和多孔的，而在超声搅拌下产生的涂层更均匀和致密。施加的超声波强度越高，涂层中的钴含量就越高。超声搅拌提高了 Zn-Co 涂层的耐腐蚀性能，在 20 W cm-2 的超声强度下获得最佳结果。