Study on optimization of coating parameters on Adhesive strength, wear rate of nano coatings

DOI: https://doie.org/10.1223/Jbse.2024824173

ShiddalingayyaMathad, Raghavendra C R, Shivakumar G, Mallikarjuna K, Jhansilakshmi K P

Keywords:

Nano coating, Wear rate, Scratch test, Electro co-deposition, Ni-Al2O3 nano coatings, Taguchi, Optimization.

Abstract:

The present work is concentrated on the electro co-deposition of Ni particles with nano Al2O3 nano particles as secondary phase particles. The coating is carried out by considering bath temperature, current density and nano particle insertion in the bath are considered for optimization of coating parameters. The design of experiments are planned as per the response surface methodology technique by central composite design method. The adhesive strength of the coating with Al6061 substrate material is carried out by scratch test. The traction force obtained during the scratch test is considered as the adhesive strength of the coating. The wear rate is carried out on pin-on-disc test rig.  The temperature and current density these parameters has a good combination of adhesive strength for constant load value 32.33N and traction force value is 61N. The coating replicates the profile of the substrate very closely. Traction force is influenced by the hardness of the material. The interaction effect of particle loading with current density is more influencing on wear resistance. The optimized values are temperature of 30oC, current density of 1 A/dm2 and particle loading of 4.8 g/L.

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