Abstract
This work point to a wide potentially on performance improvement of transition metal-based coating system especially Ni-TiN-AlN and Ni-TiN-AlN/Si3N4 composite coatings by using electrodeposition process. Electrodeposition is widely used in metal matrix composite for many industrial applications due to a relatively cheap solution to enhance the composite performance. The aim of this work is to study the influence of various current density and nitride particles concentration on corrosion behaviour of composite coatings. The corrosion test was performed by immersing the deposited composite samples into acid solution for 2 hours. The results showed that the corrosion rate of Ni-TiN-AlN and Ni-TiN-AlN/Si3N4 composite coatings tend to increase as the current density was increased. While, the corrosion rate of Ni-TiN-AlN composite coatings at various nitride (TiN, AlN) particles concentration tend to decrease as the nitride (TiN, AlN) particles concentration was increased. It was shown that corrosion resistance of Ni-TiN-AlN/Si3N4 composite coatings at various Si3N4 was excellent due to the effectively incorporation of the Si3N4 particles as the corrosion barrier.
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