Nickel deposits obtained by continuous and pulsed electrodeposition processes

Metallic coatings are used for protection against corrosion of metal structures. the protection provided depends on the physico-chemical coatings. three factors are crucial to have good resistance to corrosion morphology,crystallographic orientation and composition of layers. these can be modified in view of improving the corrosion resistance [1] by using appropriate organic additives. a promising alternative is also possible by the dedicated implementation of the electrodeposition technique in pulsed mode [2]. this technique allows an improvement of the characteristics of metals and alloys deposited compared to coatings obtained by conventional routes. this work is part of that objective. thus we propose to optimize the parameters of development,pulsed coatings of nickel. morphology of coatings was characterized by observations in scanning electron microscopy (sem-feg). the x-ray diffraction in symmetric mode was used to evaluate the structure and the main crystallographic orientations of the deposits. the results obtained,showed that the development in pulsed induced a marked improvement in the morphology and grain refinement.