Schematic of the galvanic corrosion evolution on η-phase (MgZn₂), β-phase (Al₃Mg₂), Q-phase (Al₄Cu₂Mg₈Si₇), and π-phase (Al₈Mg₃FeSi₆) coupled to aluminum at different pH values using the SVET current density map.

Electrodeposition of chromium (Cr) and nickel (Ni) and their alloys have been subjects of interest for a long time. Owing to their special features such as high corrosion resistance, good wear resistance, lustrous nature etc., Cr and Ni electrodeposit continue to be the subject of investigation and further development, and improvements in their qualities and application remain one of the aims. This paper reviews the advances made so far in Cr and Ni electrodeposited coatings, with special emphasis on showing the potential of the process for achieving high-quality coatings. Furthermore, this review focuses on the mechanisms involved in Cr and Ni electrodepositions, with the aim of understanding the basis and manipulating the processes to produce coatings with excellent features and high-end usage. The issues encountered in the electrodeposition processes and products, as well as proffered solutions via research and development, were also addressed. Finally, long-term prospects and applications of these coatings were discussed to provide powerful and complementary toolkits for engineering applications while enabling future advances in critical aspects identified.