▎ 摘　　要

NOVELTY - Manufacturing reduced graphene oxide from Kish graphite comprises provision of Kish graphite, intercalation of Kish graphite with a persulfate salt and an acid at room temperature to obtain intercalated of Kish graphite, and expansion of the intercalated Kish graphite at room temperature to obtain expanded Kish graphite, where the mixture of the expanded Kish graphite with at least an acid and an oxidizing agent while the gases generated during the expansion step are still at least partially present so that the expanded Kish graphite is simultaneously oxidized, exfoliated and reduced into reduced graphene oxide.). USE - The method is useful for manufacturing reduced graphene oxide from Kish graphite. ADVANTAGE - The method: utilizes flotation step is performed using a flotation device; improves degree of crystalline compared to conventional methods allowing higher thermal and electrical conductivities and therefore higher quality; utilizes Kish graphite has been provided and optionally pre-treated, it is intercalated with a persulfate salt and an acid at room temperature to obtain intercalated Kish graphite; and provides reduces graphene oxide that deposited on metallic substrates to improve some properties e.g. corrosion resistance of metallic substrates.