PENGARUH KERAPATAN ARUS DALAM PROSES ELECTROPLATING STOD TERHADAP AREA HIGH CURRENT DAN LOW CURRENT
Abstract
Electroplating is the process of coating metal using the help of an electric
current through an electrolyte solution. The coating material is called the anode and
the coated material is called the cathode. Electroplating itself aims to make a metal
rust resistant, wear resistant, and decorative. The purposes of this study are to
determine the effect of the electric current density on the thickness of the nickel
chrome layer on the stod and to determine the effect of the electric current density
on the corrosion resistance of the nickel chrome layer on the stod.
In this study, stod specimens are made from cast iron coated with nickel
chrome. The electric current densitiy variations are used at 7 A / dm2 and 9 A / dm2.
The first coating process is carried out for 40 minutes in the nickel solution and the
second coating is carried out for 30 seconds in the chrome solution. Layer thickness
measurements are carried out using an Olympus BX53M series microscope.
Whereas corrosion resistance testing refers to the ASTM B117 standard with a
testing time of 12 hours.
The results showed the highest layer thickness for the variation of current
density of 7 A / dm2 is in the 8th segment with a value of 57 μm and the highest
layer thickness for the variation of the current density of 9 A / dm2 is in the 8th
segment with a value of 83 μm. While the percentage of rust that occurs in the two
variations in current density of 2%. Rust in the current density variation of 7 A /
dm2 occurs in the low current area and in the current density variation 9 A / dm2
occurs in the high current area.
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