선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
최소 단어 이상 선택하여야 합니다.
선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
가설 설정
- 4 is a photograph of a magnesium alloy PEO taken before and after surface treatment with a metallurgical microscope (500 X). As shown in the figure, the surface of the magnesium surface is markedly treated before (a), but after the PEO surface treatment (b), the oxide film is formed on the surface and the roughness of the surface state is much improved. (C) is a photograph of a PEO surface treated and then a burning surface treated again.
- 1. The shape of the reflection spectrum is complex and appears to overlap with several signals, because the surface state is uneven due to the natural oxide film, so that the spectrum becomes a complicated signal shape divided into regions 1 and 2 by the influence of diffuse reflection. On the other hand, it is seen that the reflection spectrum after PEO surface treatment is overlapped with several signals.
- 2. The thickness of the oxide film was increased as the DC voltage was increased by the thin film thickness gauge (QuaNix; 7500 M) after PEO surface treatment by voltage. This is because the higher the DC voltage, the easier the binding of the OH- ions in the solution solution and the Mg + ions of the magnesium alloy.
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