| 摘要 |
PCT No. PCT/SE89/00406 Sec. 371 Date May 8, 1990 Sec. 102(e) Date May 8, 1990 PCT Filed Jul. 11, 1989 PCT Pub. No. WO90/00631 PCT Pub. Date Jan. 25, 1990.A method and apparatus for avoiding the formation of impurities in a coating produced by hot-dip galvanizing of an object in a zinc bath. One or more flows of molten and pure zinc are, in a container, provided which are directed towards a surface region (4), i.e. the working surface (4), where the object passes on being immersed in and raised from the bath, respectively. As a rule, a surface flow is caused to pass from the one edge region (27) of the container, to its other edge region (29), any possible impurities (6) located on the surface of the bath being displaced from the working surface. The apparatus according to the disclosure includes a pump (25a) which, via a discharge pipe (33) supplies molten zinc to a gutter (26) in the upper region of a container (10). Opposing the gutter, the container is provided with a channel (31). The gutter and channel, respectively, have opposing walls with respective edges (27) and (29) over which molten zinc passes. The upper edge of the gutter is, as a rule, located higher than the edge of the channel.
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