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A new type of zinc coating line in which a zinc vapor is continuously deposited on to a steel strip in a vacuum has been installed at the Hanshin Works of Nisshin Steel Co., Ltd. in 1985. This is the first time that a zinc coating line of this type is being used in a commercial production line. With a maximum line speed of 200m/min., the high production capability is obtained by a high rate of zinc evaporation and deposition. This type of production of zinc coated steel strip in Japan costs less than that of the electrolytic galvanizing process because of a lower variable cost, lower electric cost, higher productivity and is a fully continuous process. This unit can be attached to an existing In Line Annealing type hot dip galvanizing line.

A new type of a zinc coating line in which a zinc vapor is continuously deposited on to a steel strip in a vacuum has been installed at the Hanshin Works of Nisshin Steel Co., Ltd., Japan. The quality of the product made by the Z.V.D. (Zinc Vapor Deposition) method compares favorably to the E.G. (Electrolytically Galvanized) method and has the added features of: 1. For heavily coated products the production cost is less. 2. Products can be easily manufactured having the zinc coating on one side, both sides, and as well as being differentially coated. This paper introduces the characteristics of the Z.V.D. steel sheet product and compares it to products made by the E.G. and the H.D.G. (Hot Dip Galvanized) methods.