Structural and microstructural properties of electrodeposited Ni-P coatings

 

A. Boussaha1,*, S. Alleg1, W. Tebib1, S. Messaadi2 and J.J Suñol3

 

1Laboratoire de Magnétisme et de Spectroscopie des Solides (LM2S), Faculté des Sciences, Université de Annaba, B. P. 12, Annaba 23000, Algeria

2Laboratoire d’Études Physico-Chimiques des Matériaux , Département de Physique, Université Hadj Lakhdar, Batna 5000, Algeria

3Dep. de Fisica, Universitat de Girona, Campus Montilivi, Girona 17071, Spain

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Nano-structured Ni-P coating obtained by electrochemical technique have attracted a great interest due to their good physical and chemical properties, such as high corrosion resistance and good hardness that has been applied to various kinds of industries; such as those of electronics, computers, aircrafts and cars. Ni-P coatings were prepared by the electro- deposition method on copper substrates at various applied potential from electrolyte bath. Scanning   electron   microscopy   and   X-ray   diffraction   were   used   to   characterize   the morphology and structure of the coatings. The surface morphology shows spherical compact particles. Detailed analysis of the X-ray diffraction patterns reveal the formation of α-Ni(P) solid solution with two fcc structures having different lattice parameters and different average crystallite size, in addition to NiP, Ni2P, NiP2 and Ni8P3 phosphides.

 

Keywords: electrodeposition, Ni-P coating, scanning electron microscopy, X-ray diffraction