ANTI-CORROSION COATING OF MILD STEEL USING TERNARY Zn-ZnO-Y2O3 ELECTRO-DEPOSITON
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Mild steel has found many engineering applications due to its great formability, availability, low
cost and good mechanical properties among others. However its functionality and durability is
subject of concern due to corrosion deterioration. Based on these, Yttria is selected as reinforcing
particles using electroplating process to enhance the corrosion and wear behaviors. Bath
formulation of Zinc- Yttria was prepared at moderated temperature and pH, to coat the sample.
Corrosion and wear behaviour were analyzed using electrochemical potentiostat and abrasive test
rig. The composition and microstructure of coated samples were investigated using standard
method. The microstructure of the deposited sample obtained at 10 % Yttria, revealed fine-grains
deposit of the Yttria on the mild steel surface. The results showed that adding of Yttria particles,
improved wear behaviour and corrosion resistance in sodium chloride solution. Microhardness of
the coated samples showed increases hardness values before and after heat treatment. This work
established that elecrodeposition of mild steel with Yttria is promising in increasing the wear and
corrosion resistance
Keywords
T Technology (General), TJ Mechanical engineering and machinery