IMPROVING THE PROPERTIES OF MILD STEEL BY TERNARY MULTILAYER COMPOSITE COATING VIA ELECTRODEPOSITION ROUTE
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Chemical Society of Ethiopia
Abstract
Description
A wide range of metal-oxides exhibit fascinating properties and multiple functionalities that could
address challenge of physical and mechanical deterioration of materials in service. In this study, Zn-ZrO2, Zn-SiC
and Zn-ZrO2-SiC composite coating was fabricated from zinc based sulphate electrolyte at constant current
density, depth of immersion, distance between anode and cathode with time of deposition. The effect of particle
on the physical behaviour of the coating was examined by coating gauge tester for the coating thickness and
coating texture. The mechanical properties in term of hardness and wear characteristics were examined using high
diamond micro-hardness tester and three body abrasive MTR-300 testers with dry sand rubber wheel apparatus
with 5 N and 15 N, respectively. The coating stability in harsh region was examined with isothermal furnace at
200 oC for 4 h. The structural behaviour was investigated using scanning electron microscope attached with
energy dispersion spectroscopy (SEM/EDS). The result shows that significant improvements in wear and hardness
properties are linked to the microstructural modification of the coating as a result of the embedded particulate. The
strengthening behaviour was improved with about 98% of coating efficiency. The progression of the coating
thickness and texture were in line with other results obtained.
Keywords
T Technology (General), TJ Mechanical engineering and machinery