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Experimental investigation on corrosion resistant properties of copper based nanocomposite coatings

G.R.Raghav, A.N. Balaji, K.Murugan, B.HarishKumar

The corrosion resistant coatings used conventionally are having some limitations like degradation of the coatings and improper coatings which may lead to pitting corrosion. The nanocomposite corrosion resistant coating can overcome this problem. The SiO2 nanoparticles are synthesized by ball milling process. The nanoparticles are mixed micron sized copper powder and converted into a composite. The composite materials are made into pellets using UTM. The pellets are used as targets to coat the mild steel substrate using sputtering process. SEM analysis indicated that the elements in the copper based nanocomposites are homogeneously distributed and agglomeration was observed. The SiO2 and copper based nanocomposites are characterized using AFM, XRD and SEM. The corrosion resistance of nanocomposite coatings is tested using weight loss method and electrochemical method.