The corrosion behavior of the steel bar in specimens was monitored using electrochemical impedance spectroscopy (EIS), open circuit potential, linear polarization resistance (LPR) and corrosion currents.

The results indicate that at the range of 20 to 70 ℃,with increasing temperature the corrosion current density Icorr increases,and the linear polarization resistance Rp and the charge transfer resistance Rt depress.

The paper introuduces application parameters and foundamental characteristics of the newly developed high energry ZnO ceramics linear resistor,the results of study are also re- ported.

After a study of various existing de-excitation methods of generators, a new method of using the linear resistor and nonlinear resistor together as the de-excitation resistance is presented.

The author present a new developed neutral grounding resistor based on zinc oxide linear resistors which features high thermal capcity, low heating level, stable resistivity, safely and excellent service performance.

The microstructure of ZnO-Pr_6O_(11)-based varistors and ZnO-Bi_2O_3-based varistors were analysized by using X-ray diffraction (XRD),scanning electron microscope(SEM),energy-disperse X-ray spectroscope(EDX) etc technical ways.

As operation mode of the system is not changed, the computer control technique and the voltage limiting technique using nonlinear resistance of zinc oxide are used to monitor voltage of electric network continuously.