Steel has a very important role in industries. Steel is used for machinery component production. This component should be strong, wear-resistant, and not easily undergoing corrosion. The objective of this research was to find study the influence of Zn-Mn electroplating current density to corrosion rate of AISI 1020 steel in NaCl 3% corrosive media. Samples were soaked into electrolyte solutions of ZnSO_4.7H_2O and MnSO_4.H_2O with current density variation of 60, 70, 80, 90, and 100 mA/cm~2 for 50 seconds. The result showed that the higher electroplating current density, then the more deposit would be in the steel that improved steel mass and steel element composing content. This decreased corrosion rates. The lowest corrosion rate of 0,29×10~4 mm/y was obtained in 100 mA/cm~2 current density
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