ANALISIS VARIASI WAKTU DAN TEMPERATUR PELAPISAN NIKEL – TEMBAGA TERHADAP KETEBALAN LAPISAN DAN LAJU KOROSI BAJA AISI 1020

Abstract

Steam boiler economizer pipes (boilers) in hydroelectric power plants (PLTA) are easily corroded caused by the fluid and surrounding environmental factors, as well as thinning of the pipe thickness caused by corrosive elements in water. The purpose of this study was to study the effect of temperature and time of nickel-copper electroplating on the results of thickness and corrosion rate on the surface of AISI 1020 steel. Electroplating is an electrolysis, in which metal deposition occurs on the surface of the metal to be coated. The coated metal is AISI 1020 which is a material for making boiler tubes. This coating uses a Nickel solution as a base layer, followed by a layer of Copper. The specimens in this study were 55x30x5 (mm). Nickel and copper plating have variations in immersion time of 5, 8, 10 (minutes) and variations in solution temperature of 55, 60, 65 (°C). The results of this electroplating will be tested for the thickness of the resulting coating and its corrosion resistance. The results of this study show that the greater the electroplating temperature and the time used, the greater the thickness value and the smaller the corrosion rate value to damage AISI 1020 steel. In the 5th minute with a temperature of 55 °c in both solutions, the thickness value is 22.46 μm and the rate value is corrosion 0.00864 mm/year. Whereas in the 10th minute with a temperature of 65 °c in both solutions, the thickness value was 25.72 μm and the corrosion rate value was 0.00470 mm/year