Y.-J. Wang’s scientific contributions

Spinel structure of (Mg, La) substituted spinel Ni-Zn ferrite has been synthesized by sol–gel auto combustion method. The ferrite exhibits a single-spinel structure. The ferrite is studied as a microwave absorbing material. The microwave measurements are carried out by a vector network analyzer. The reflection loss of the ferrite is calculated as a single-layer absorber. The results indicate that the ferrite annealed at 850°C has great potential for application in electromagnetic wave attenuation.

The splash zone is the most severe corrosion environment for marine steel structures, which seriously threatens the security of service for steel structures, tt is particularly necessary to develop long lasting technology for steel structures in splash zone, This paper introduces recent advances in the development of the corrosion control techaiques for steel structures in splash zone at home and abroad, In addition, thermal spray anti-corrosion technique and its engineering application are summarized, the characteristics and future research directions of thermal spray corrosion protection technique are also presented.

The corrosion processes of Zn-Al coating in copper accelerated acetic acid salt spray test(CASS) was studied with electrochemical impedance spectroscopy(EIS), and equivalent circuits were proposed, which was based on the physicochemical process of the corrosion. The evolution features of the corresponding electrochemical parameters were analyzed. Scanning electron microscope and electron spectrometer were used to analyze the microstructure and compositions of Zn-Al coating after corrosion, which was used to explain the evolution features of the corresponding electrochemical parameters. The results revealed that corrosion process of Zn-Al coating changed from charge transfer control to diffusion control and finally got into matrix corrosion period in CASS.

In this paper, Zn-Al and Zn-Al-Mg-RE coating were prepared by automatic high velocity arc spray. Corrosion resistance property was studied by immersion experiment in 3.5%NaCl aqueous solution. The microstructure and phase compositions of these coatings were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results revealed that automatic high velocity arc spray coatings were homogeneous and well connection with the substrate. Red rust was not seen on the surface of the two coatings in immersion experiment; which provide sufficient protection to steel structure against corrosion.