Abstract: An automatic machine for hot dipping galvanization has lower and upper frames to support a slide, an elevator and a control device. The slide consists of two sets of sprocket wheels, each having two sprocket wheels installed at respective ends of each frame controlling a plurality of guide rails via link belts to slide along two slideways. The elevator consists of an elongated elevator hanging on top of the lower frame by means of four guide supports which each have one end connected to the elevator and the other end to a U-shaped rod. Two arcuate plates extending outwards from respective ends of the elevator carry articles to be galvanized into the zinc bath and galvanized articles out of the zinc bath. The control device consists of a central processing unit which controls the entire movement, a motor which controls the slide, and a cylinder which controls the elevator.

Abstract: A method of adhering a colored electroplating layer on zinc-electroplated steel articles that utilizes an alternating current power supply which supplies electricity of frequency of 10-20 Hz, voltage of 60-120 V, and current density of 20-80 Amp/dM.sup.2 ; and an aqueous electroplating solution which contains 150-200 g/l of silicate, 15-20 g/l of sodium hydroxide and 5-50 g/l of cobalt salt. The electroplating liquid is kept at a constant temperature of 20.degree. C.-30.degree. C. In this method, two stages are utilized to perform the electroplating and adhere a colored electroplated layer so that the surface of the zinc-electroplated layer can adhere a blue electroplated layer. Thus the aesthetics and the corrosion-resistant capability of the zinc-electroplated layer can be enhanced because of the colored electroplated layer adhered to the surface of the zinc-electroplated layer.