PENGARUH TEMPERATUR DAN WAKTU PELAPISAN NIKEL TERHADAP KETEBALAN DAN KEKERASAN PERMUKAAN PADA BAJA ASTM A36 MENGGUNAKAN PROSES ELEKTROPLATING

Ilyasa, Kefin Firas (2024) PENGARUH TEMPERATUR DAN WAKTU PELAPISAN NIKEL TERHADAP KETEBALAN DAN KEKERASAN PERMUKAAN PADA BAJA ASTM A36 MENGGUNAKAN PROSES ELEKTROPLATING. Sarjana (S1) thesis, Universitas Islam 45.

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Abstract

Electroplating is a coating group that relies on chemical solutions (electrolytes) in the transfer of metal ions to other metals with an electric current flowing. Electroplating is carried out in order to affect the characteristics, namely by providing the properties of coating thickness, hardness and surface structure to the workpiece which is expected to experience an influence in terms of surface structure and resistance to corrosion. The research using ASTM A36 steel material which will be carried out by nickel electroplating process aims to determine the influence of the length of time and temperarure of the solution on the yield of the thickness and hardness value of the steel. Using time variations of 45, 60, and 75 minutes as well as solution temperatures of 35OC and 50 OC, thickness testing will be carried out with a digital dial gauge and hardness testing with a Rockwell A (HRA) hardness measuring instrument. The results showed that the highest thickness value occurred in specimens with a duration of 75 minutes and in a solution temperature of 50 OC with a thickness value of 3,980 mm, and the lowest thickness value occurred in a duration of 45 minutes and in a solution temperature of 35 OC with a thickness value of 3,941 mm. Where the thickness value increases along with the increase in time and temperature of the solution. Meanwhile, the lowest hardness value occurred at a time of 45 minutes and a solution temperature of 35 OC with a hardness value of 47.5 HRA and the highest surface hardness result occurred in a specimen with a duration of 60 minutes and a solution temperature of 50 OC with a hardness value of 49.6 HRA. From this data, the higher the temperature and the length of time the thickness will increase, but the hardness will decrease due to the soft nickel layer. Keywords: Electroplating, ASTM A36, time, temperature, thickness and hardness

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