en Research Paper Research Paper Nickel phosphorus alloy coatings were prepared by electrodeposition route from sulfate electrolyte bath at various current densities. SEM studies reveal spherical grains covered the entire surface with uniform distribution. EDX results showed a linear increase of P content in the developed deposits with current density and therefore, enhancing the grains size and drop of the hardness values. XRD studies reveal monocrystalline orthorhombic alloys at a low amount of phosphorus (10.88 wt. %). Corrosion tests show that 1 A.dm-2 is the best applied current density giving the nobler Ecorr (-171.4 mV) and the lower icorr (4.64 µA/cm²). Ni–P alloy coatings,Crystal structure,P content,Hardness,Electrochemical properties. 1 7 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-3682-1&slc_lang=en&sid=1 Farid Lekmine faridtec@gmail.com 1800319475328460014735 1800319475328460014735 No Physics laboratory of Thin Layers and Applications, Biskra University, Hachemi Ben Temam ha_bentemam@yahoo.com 1800319475328460014736 1800319475328460014736 No Physics laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria Elhachmi Temam elhachemi.guettaf@univ-biskra.dz 1800319475328460014737 1800319475328460014737 Yes Physics laboratory of Thin Layers and Applications, Biskra University, BP 145 RP, Biskra 07000, Algeria