The influence of process parameters on the MoS2 content of Ni-MoS2 composite coating by the robust design method

The influence of process parameters on the content of molybdenum disulfide (MoS2) in nickel (Ni)-MoS2 composite coating was analyzed by Robust Design method. According to the experimental results, the MoS2 concentration in bath is the most significant influence on the MOS2 content of Ni-MoS2 composite coating, followed by other parameters such as the relative concentration of surfactant, bath temperature, and current density. No significant effect on the interactions was found between the factors, except for the interaction between the MoS2 concentration and the relative concentration of surfactant. A second-order model of regression has also been developed to predict the content of MoS2 in the Ni-MoS2 composite coating. The optimum conditions, within the range of parameters and levels tested, for obtaining the maximum MoS2 content in Ni-MoS2 coating are MoS2 concentration in bath: 30g/L, relative concentration of surfactant: 20mg/cMoS(2). current density: 4A/dm(2), pH value: 3, and temperature of bath: 50degreesC.