Anti-Corrosion and Tribo-Mechanical Properties of Co-deposited Zn–SnO2 Composite Coating
No Thumbnail Available
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
Zn–SnO2 composite coatings were prepared by direct potential using electrolytic co-deposition technique from
sulfate solution. The effect of Zn2? and SnO2 concentrations in deposited bath on the mechanical properties and morphological
characteristics of the composite coatings were examined. The characterizations of the sample were analyzed
using scanning electron microscopy couple with energy dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD) and
atomic force microscopy (AFM). The electrochemical degradation behavior of the samples in 3.65 wt.% NaCl solution was
studied using potentiodynamic polarization technique and characterized by high-resolution optical microscope. From all
the fabricated composite coatings, obvious diffraction peaks were observed with Zn-7Sn-S-0.3V film with Zn2Sn7, Sn,
Zn2Sn5 and Zn phases, confirming the presence and formation of Zn–SnO2 coating. The XRD pattern shows that the
presences of SnO2 particle remarkably play a major role in the precipitation and orientation of the alloy matrix. From the
SEM/EDS and AFM results, the deposits show that composite particle and proper bath composition have strong influence
on the microstructure. An enhanced corrosion resistance was attained as a result of the induced particles.
Keywords
T Technology (General), TJ Mechanical engineering and machinery