Analysis of the Effect of Time on Tensile Strength and Hardness of Electroplating Method Using Nickel on Aluminum 7075

Abstract

The purpose of this research of aluminum electroplating with nickel is to improve the value of its tensile strength and hardness. This test was conducted to determine the effect of time towards the tensile strength and hardness of nickel on aluminum 7075 electroplating and the time required to achieve optimum conditions. The materials used in this study are aluminum 7075 and nickel plating. The finishing treatment process used was electroplating method. Fixed variables utilized in this study comprised the voltage (25 V), gap between electrodes (15 cm), amount of water (2400 ml), salt (four spoons), vinegar (1600 ml), aluminum, and nickel for plating. The variations used in immersion time were 30, 40, and 60 minutes for further tensile test and hardness test. The result of this research shows that the highest tensile strength value obtained was 546,155 MPa with 60 minutes coating time. While the value of hardness from time to time varied with the highest rate in of 30-minute coating time was 188.266 kgf/mm. According to the test results, it can be inferred that the longer coating time it takes, the higher the tensile strength rate the material obtains.