Thus the paper gives the calculation model of the electric field generated by steady current in the sea based on point-electrode.

By applying the Hankel transform and the polynomial approximate expression of Kelvin functions,the analytical expressions of the electric fields are presented for a extremely low frequency(ELF),time-harmonic,point-electrode in the deep sea.

Optimization of process parameters of vibration electrospark deposition TiC on spot-welding electrode;

Functional TiC coating was deposited on the surface of Cr-Zr-Cu spot-welding electrode by vibrating electrospark deposition.

In order to improve the life of spot-welding electrode for zinc-coated steel,electrospark deposition(ESD) processes were studied taking TiC as fusing material and CrZrCu as spot-welding electrode.

Both sides electric currents,the voltage and the dynamic resistance were tested on continual spot welding process,the track test results under the different spot welding electrode active status were contrasted and analyzed,the best method of online detection of spot welding electrode active status was determined.

Formation mechanism of electrode pitting in resistance spot welding of aluminum alloys;

Study of electric field generated by point electrodes pair in sea;