Investigation on microstructural, anti-corrosion and mechanical properties of doped Zn–Al–SnO2 metal matrix composite coating on mild steel
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Scopus Elsevier
Abstract
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In this study, the microstructural, mechanical and anti-corrosion properties of nanocomposite Zn–Al
coating containing SnO2 nanoparticles prepared from sulphates electrolyte by electrodeposition on mild
steel substrate was investigated. The morphologies of the coating were analysed using SEM/EDS, AFM
Raman and X-ray diffraction. The anticorrosion behaviour of the coating prepared with different concentrations
of SnO2 (7 and 13 g/L) and potential of (0.3 and 0.5 V) was examined in 3.65% NaCl solution by
using linear polarization techniques. The wear and hardness properties of the coatings were performed
under accelerated reciprocating dry sliding wear tests and diamond micro-hardness tester respectively.
The results obtained showed that the incorporation of SnO2 in the plating bath brings an increase in corrosion
resistance and mechanical properties of Zn–Al–SnO2 composite coatings. The SEM images showed
a homogeneous grain structure and finer morphology of the coatings. The hardness values was found to
improve with the amount of the SnO2 embedded into the Zn–Al metal deposit and effective deposition
parameters
Keywords
T Technology (General), TJ Mechanical engineering and machinery