Effect of electroplating process time on medal antique gold colour of zinc alloy material

Effect electroplating process time on medal antique gold colour of zinc alloy material has been investigated. Keys with length of 50 mm is made of zinc alloy material were used as specimens to experiment. Gold electroplating was used to experiment. Experiment condition was conducted at 12 volt with current of 3 ampere, and at 24 volt with 5 ampere. In experiment, the variable of time is 3, 5, 8, 10 and 15 minute, respectively. The experiments of electroplating on medal antique gold colour of zinc alloy material were conducted at 13 times under controlling voltages, currents and duration of test so that it would get antique gold colour. Drying process was carried out at temperature between 100 ˚ and 150 ˚ C using a heating machine. The experiment was based on value diagram of RGB, CMYK, HSV, HSL, CIE*L*ab, CIE*L*ch, CIE*L*uv, Xyz coordinate, Yxy coordinate, and RYB. The result obtained that the colour was almost the same as antique gold colour significantly, when specimen 5 was tested at rectifier of 24 volt with current of 5 ampere in 4 minute of electroplating process and in 1.5 minute for oxidation process.