The Ni- ZrO2 nanocomposite coatings were prepared by pulse electrodeposition with rotating cathode in an ultrasonic field, and the corrosion resistance of the coatings were studied in 5% H2SO4. The surface morphologies of composite coatings after corrosion were analyzed by scanning electron microscope (SEM). And corrosion rate was tested using an electronic balance. The results shows that, compared with pure Ni coating, pulse current composite coating and pulse current composite coating with ultrasound, the Ni-ZrO2 nanocomposite coating prepared by pulse electrodeposition with rotating cathode in an ultrasonic field has more uniform micro-structure, more compacted grain and lower corrosion rate. Peculiarly, it exhibits excellent corrosion resistance.
The H- infinity stability of Lurie switched systems is investigated. All the subsystems are Lurie systems. Lyapunov functions is used to derive the sufficient conditions for H- infinity stability of systems .
In this paper, we investigated the diffusion behaviour of in the mixture of ethylene carbonate (EC) and propylene carbonate (PC) electrolyte solidified by polyacrylonitrile ( PAN, molecular weight: 60,000). The effect of the ion diffusion process on the photoelectric properties was also studied. The ion diffusion process was found to be the main factor to the photoelectric properties in the quasi-solid state dye-sensitized solar cells. Some ideas, such as the optimization of the thickness and the concentration of in the electrolyte, were proposed to improve the transport velocity of.
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