REDUCED GRAPHENE OXIDE (AIRGO) AS CORROSION RESISTANT MATERIAL FOR MILD STEEL SUBSTRATES.

Reduced Graphene Oxide (AIRGO) can be used to coat mild steel and achieve corrosion resistance. The coating is resistant to dilute hydrochloric acid, 3.5 % saltwater solution as well as alkaline solutions above pH 9. The AIRGO is made using modified Hummers method which is well documented in the literature.

A 3 to 6-layer deposition of AIRGO on mild steel substrates is necessary to achieve excellent corrosion resistance.

To achieve this 3 to 6-layer deposition of AIRGO one must ultrasonically disperse AIRGO into solvents like 1-propanol or a mixture of propanols. The mild steel substrates are then dipped into the AIRGO solution and carefully removed after dipping. (Dip coating method). The wet substrate is dried completely & preferably at 75⁰C for about 2-3 hours to achieve a 1^st coat.

In a similar manner 3 coatings are made on the mild steel substrate.