The Preparation Of Ni-Mo-P Alloy On The Surface Of Aluminium And Its Electrocatalytic Performance Study

In this paper, the preparation process of chemical depositing Ni-Mo-P alloy layers on the surface of aluminum and the obtained layer's performance were studied. By orthogonal experiment, the optimum chemical plating process conditions were determined. The phase structure, surface morphology, corrosion resistance and electro-catalytic activity of the alloy layers were analyzed by XRD, SEM, anodic polarization, cyclic voltammetry and other testing methods.1. The optimum chemical plating process conditions of the chemical plating Ni-Mo-P alloys were determined by orthogonal experiments. XRD and SEM testing methods were used to test the phase structure and surface morphology of the coatings.2. The corrosion resistance of crystalline Ni-P alloy layer, amorphous Ni-P alloy layer and amorphous Ni-Mo-P alloy layer were studied by acid/alkali corrosion and anodic polarization methods.3. In optimum conditions, the Ni-Mo-P alloy layers was improved by adding rare earth element cerium, precious metal platinum and nano-particles TiO2 in the plating solution.4. The electro-catalytic activity of Ni-Mo-P alloy plating, rare earth cerium-modified Ni-Mo-P alloy plating, precious metal platinum-modified Ni-Mo-P alloy plating and TiO2-modified Ni-Mo-P alloy plating were determined by cyclic voltammetry and AC impedance method.5. Main factors which affect the electro-catalytic properties of Ni-Mo-P alloy layers, were also discussed and analysed.The results showed that the Ni-Mo-P alloy layer was amorphous, it not only had good corrosion resistance and surface morphology, but also had good electro-catalytic activity for the anodic oxidation of methanol. By doping modified method, the electro-catalytic activity of Ni-Mo-P alloy layer can be further improved. Both the nature of the alloy and the testing parameters in electrochemical process affect the electrocatalytic activity of Ni-Mo-P alloy layer.