In this study the effect of different concentration of two Ethylenediamine and Thiourea additives separately on the corrosion behavior of these coatings studied. In the first step, the effect of Ethylenediamine concentrations (0.1, 0.2, 0.3 and 0.4M) on the electroplating bath was investigated. First, the morphology of the sample was examined by SEM technique and it was observed that the coating became denser by increasing the concentration of this additive. Also the presence of nickel, tungsten, carbon and nitrogen elements and the formation of nickel-tungsten alloy in the coating was confirmed by the use of EDX and XRD technique respectively. By contact angle technique the hydrophilic and hydrophobic behavior of the coating containing 0.4 molar additive was investigated and this behavior was relatively dependent on the amont of roughness existing on the surface. cyclic voltammetry was used to study the electrochemical behavior of nickel-tungsten in the coatings. Also, tafel polarization and impedance (EIS) test were used to study the corrosion behavior of coatings and the results showed an increase in corrosion resistance and a decrease in corrosion density Proportional to the increase of Ethylenediamine concentration. In the second step, the effect of concentration (0.1, 0.2, 0.3 and 0.4M) Thiourea on the electroplating bath was investigated. The SEM for samples 0.1, 0.2 and 0.4 molar thiourea showed the cracks on the surface of the coating and only the sample with 0.3 molar thiourea were compact and whithout cracks can be seen. The presence of nickel, tungsten, carbon and sulfur elements and the formation of nickel-tungsten alloy in the coating were also confirmed by using EDX and XRD thechniques respectively. By contact angle technique the hydrophilic and hydrophobic behavior of the coating containing 0.3 molar additive was investigated and this behavior was relatively dependent on the amont of roughness existing on the surface. cyclic voltammetry was used to study the electrochemical behavior of nickel-tungsten in the coatings. Also, tafel polarization and impedance (EIS) test were used to study the corrosion behavior of coatings and the results showed an increase in corrosion resistance and a decrease in corrosion density Proportional to the increase of Thiourea concentration.