Influence of the Presence of Silver Nanowires on the hardness, tribological behavior and Corrosion Properties of Aluminum Anodizing coating

Document Type : Research Article

Authors

1 Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran

2 Professor of Materials Engineering, Isfahan University of Technology, Iran

3 Department of Materials Engineering, Isfahan University of Technolog, Isfahan, Iran

/amnc.2019.8.30.2

Abstract

anodizing due to the significant increase in the surface performance of aluminum and its alloys is an appropriate method in the field of surface engineering. But for the application of this method as much as possible, filling the porosity of this coating is a very effective selection. On the other hand, due to the unique structure of the oxide layer, this layer can also be used to grow a variety of nanowires. In this study, 1070 aluminum anodizing was performed in oxalic acid-sulfuric acid solution. Microstructure of the coating was studied by means of field emmision scanning electron microscopy (FESEM) images. Subsequently, silver nanowires were grown in the oxid layer by electrochemical deposition method. The result of X-ray diffraction(XRD) test showed that the oxide layer has a non-crystalline structure and silver nanowires has a very high purity. . The growth of silver in the oxid coating resulted in a 55% increase in the wear resistance. The scanning electron microscopy (SEM) images of the wear surfaces showed that this increase is related to silver lubrication nature that have reduced the coefficient of friction of the coating in the presence of these fillers. The effect of these nanowires on the corrosion resistance of anodized aluminum was studied by using electrochemical impedance and TOEFL polarization tests

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References

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