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A new thin organic composite coated Zn-Ni alloy electroplated steel sheet has been developed by applying the techniques of silica-added chromating and electrostatic organic dispersed coating. This coated steel sheet has better corrosion resistance and weldability than the conventional thin organic composite coated Zn-Ni steel sheet prepared by the roll coating method .

Zinc-iron alloy coated steel sheet for automotive body panel has been developed. This newly developed sine-iron alloy coated steel sheet is produced in a continuous vapor zinc depositing, galvannealing and ferrous alloy electro-plating (plating of 4 g/m2 as an upper layer only for outer panel) process at the Hanshin Works of Nisshin Steel Co., Ltd., Japan. This paper introduces the performances of this steel sheet; that is to say, the finishing quality of painting including cation type electro-coating, the corrosion resistance with and without paint coating, the weldability and the press formability. Through the tests, it was confirmed that this product possesses advantages of both conventional hot-dip galvannealed steel and zinc-iron alloy electro-plated steel and fully meets higher performance requirements for inner and outer panels of automotive bodies.

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.

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.