Materials and Energy Research Center (MERC) Iranian Ceramic Society (ICERS) Advanced Ceramics Progress 2423-7477 7 1 2021 03 01 Heat Treatment of Pulsed Electroplated Nickel Deposited on AA2024 Aluminum 46 51 132766 10.30501/acp.2021.252211.1048 EN A. Khiabani Department of Metallurgy and Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Alborz, Iran 0000-0002-6177-7126 Z. S. Seyedraoufi Department of Metallurgy and Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Alborz, Iran 0000-0002-2240-4204 M. Heydarzadeh Sohi School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran, Tehran, Iran 0000-0001-5622-4482 Journal Article 2021 05 14 In this study, pure nickel was deposited on AA2024 aluminum via pulsed electrodeposition using two duty cycles (25 % and 50 %) at two different frequencies (50 and 100 Hz). The coated specimens were then heat-treated in an argon atmosphere at 500 °C for one hour. The treated specimens were characterized using Optical Microscope (OM), Scanning Electron Microscope (SEM) equipped with energy dispersive spectrometer (EDS), and X-Ray Diffraction (XRD) analysis. According to the results, the coatings were thickened upon increasing the duty cycle and frequency. Heat treatment of the nickel-coated specimen under the duty cycle of 25 % and frequency of 50 Hz experienced formation of Al₃Ni intermetallic compound at the interface of the nickel coating and aluminum-based substrate. Heat treatment adversely affected the corrosion resistance of the nickel-coated specimens. Nevertheless, the specimens with Al₃Ni intermetallic compound at their interface demonstrated better corrosion resistance among heat-treated materials. https://www.acerp.ir/article_132766_0721193038205f8bda87e34795d1e061.pdf