Papers by Author: Rong Guang Wang

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Authors: Rong Guang Wang, Hiroki Sawada, Mitsuo Kido
Abstract: The electroless plating composite film Ni-P-Al2O3 was prepared on a mild steel of SS400 with stirring of the plating solution. The composite film became thinner and rougher when Al2O3 particles were blended into the plating solution. The corrosion resistance and the wear resistance of the composite film were largely enhanced in comparision to the Ni-P film.
Authors: Tarou Tokuda, Mitsuo Kido, Rong Guang Wang, Gonojo Katayama, Fumihiro Suzumura
Authors: Rong Guang Wang, Mitsuo Kido, Yoshiko Shinhara
Abstract: An electronic speckle pattern interferometry (ESPI) method was applied to nondestructive detection of cracks and delaminations of ceramics coating (Al2O3/NiCr) on SUS304 stainless steel. A drop of surface strain on the coating was found when cracks in the coating or delaminations from the coating/substrate interface occurred.
Authors: Yoshiko Shinhara, Tarou Tokuda, Fumihiro Suzumura, K. Ohtani, Rong Guang Wang, Mitsuo Kido
Abstract: Detection of delamination of a thermally sprayed coating on an SUS304 substrate was carried out nondestructively using electronic speckle pattern interferometry (ESPI) method in both static and cyclic tests at T=298 K and 873 K. Results showed that the surface strain of the coating becomes smaller than that of the substrate when delamination occurs from the interface of the substrate. Two parameters of critical strain of ε c and ε f, which correspond respectively for the static test and the cyclic test, are introduced to evaluate the existence of delamination according to the ε- σ s and ε-N curve. It is considered possible to evaluate the occurrence of delamination in cyclic tests using the static critical strain of ε c, instead of ε f.
Authors: Rong Guang Wang, Mitsuo Kido, Koji Mukai
Abstract: The corrosion behavior of pure titanium and Ti-6Al-4V alloy in NaF solutions and the wettability of pure water on the specimens after corrosion were investigated. The relation between the change of surface chemistry and roughness of specimens after corrosion and the wettability of pure water droplets on such surfaces were discussed.
Authors: Rong Guang Wang, Hiroki Sawada, Nan Wang, Jian Nie
Abstract: The Ni-P-Al2O3 composite film was coated on mild steel of SS400 with electroless plating method. In this process, different sizes of Al2O3 particles and different blended amounts of Al2O3 particles into the plating solution were applied. From the surface and cross section observation, it is known that the Al2O3 particles were uniformly dispersed in the Ni-P alloy. The highest corrosion resistance and the highest wear resistance of the Ni-P-Al2O3 composite film were obtained when adding Al2O3 particles with the mean diameter of 0.05μm into the plating solution at the blended amount of 1.0g/L.
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