The corrosion behavior of Mg-10Gd-2Y-0.4Zr (GW102K) alloy under thin electrolyte layer (TEL) with various thicknesses was investigated by means of cathodic polarization curve, electrochemical impedance spectroscopy (EIS), and electrochemical noise (EN). Based on shot noise theory and stochastic theory, the EN results were quantitatively analyzed by using the Weibull and Gumbel distribution function, respectively. The experimental results showed that the anodic and cathodic processes of the corrosion of GW102K alloy were both retained under thin electrolyte layers. Whether under TEL or not, the cathodic process was dominated by hydrogen evolution reaction. The corrosion was more localized under thin electrolyte layer than that in bulk solution. The results also demonstrated that there were two kinds of effects for thin electrolyte layer on the corrosion behavior of GW102K alloy: (i) the rate of pit initiation was evidently retarded compared to that in bulk solution; (ii) the probability of pit growth decreased, which should be the real reason why the corrosion rate of GW102K alloy decreased with the decrease in layer thickness.

The development of a novel amphibian walking robot prototype is proposed according to the need of duty under bad circumstance. It can be used as the carrier of the reconnaissance equipment, the weapon system and the communication system, and complete many kinds of missions in the place near the sea and tideland which a man can not complete. Some new dynamics questions is introduced because of multi-leg structure features and functionality of the amphibious. The integrated approach of series parallel is proposed to solve the characteristic that swing and supporting phase are appeared respectively during walking. Hydrodynamic effect is also considered in our dynamics equation. At last, the least distribution model of driving moment and driving energy of robot are set up in this paper. These conclusions have very important effects to the control of robots.