한국표면공학회지 (Journal of the Korean institute of surface engineering)
- 제33권4호
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- Pages.233-240
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- 2000
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- 1225-8024(pISSN)
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- 2288-8403(eISSN)
정전 대전된 액적에 의한 용융 아연 도금층의 응고 방법
Solidification of Hot-Dip Galvanized Layer by Electrostatically Charged Aerosol Particles
초록
A novel electrostatic spraying method to solidify molten zinc coating layer was studied by SEM and measurement of sample's temperature. The sprayed droplets also served as nucleation sites in the solidification reaction of molten zinc but might leave the pitting mark by impinging on its surface especially at high spray pressure. Our experimental results showed that electric field could change the sprayed particle trajectories and assist the fine droplets to attach on the surface. Thus, by reducing the spray pressure and by applying the electric voltage higher than -20 KV to charge the droplets electrostatically, we could produce the spangle free galvanized coating layer without pitting.
키워드