| 摘要 |
A hot-formed metal body emerges from a hot-forming stage in a solid, relatively scale-free, and hot condition and passes immediately into a treatment chamber prior to any substantial scale formation thereon. In this chamber a powder is sprayed on the body which, on cooling, forms a glassy, enamel-like coating on the body. After thorough cooling of the body, the coating is stripped off in a straightening apparatus and the body is recoated with a protective, relatively-long-lived coating or retains a coating, e.g., of zinc, applied with the temporary enamel coating. |
