Praseodymium-decorated graphene oxide as a corrosion inhibitor in acidic media for the magnesium AZ31 alloy

Abstract

The Mg alloys 111 surface is covered by the praseodymium decorated graphene oxide sheet, and (A) & (B) indicates ions diffusion control (C) indicates epoxy coating failure.

Experimental and computational studies of graphene oxide covalently functionalized by octylamine: electrochemical stability, hydrogen evolution, and corrosion inhibition of the AZ13 Mg alloy in 3.5% NaCl

“…1 The nanoparticle-incorporated graphene oxide behaved as a corrosion inhibition barrier on the mild steel alloy surface in an acidic medium. 2,3 Furthermore, phenylenediaminefunctionalized graphene oxide acted as a corrosion barrier layer on the copper surface. 4 Virtanen discussed the biological importance of the Mg alloy and its interaction with the body and its uids.…”

Neodymium-decorated graphene oxide as a corrosion barrier layer on Ti6Al4V alloy in acidic medium

“…The GO synthesis was carried out by the modied Hummers method. According to our previous work, 32 1 g of natural graphite powder, 50 mL of H 2 SO 4 , and 40 mL of H 3 PO 4 were added into a 250 mL round bottom ask and the ask was kept in an ice container, followed by the slow addition of 3 g of the oxidation agent KMnO 4 to the mixture. The mixture temperature was increased and kept at 60 C during 12 h of reux.…”

“…[24][25][26][27][28][29][30][31] Recently, we investigated the praseodymium-decorated graphene oxide as an inhibition barrier layer on magnesium AZ13 alloy in strong acidic environments, and showed that GO-Pr improved the inhibition efficiency because the corrosive species could not interact with the alloy surface. 32 Even though the corrosion inhibition activity of the neodymium-decorated graphene oxide has not been studied to the best of our knowledge, their slightly minor ionic ratio (Nd 3+ 112 pm, Pr 3+ 112 pm) and the presence of the 2 + and 3 + states in comparison with Pr that preferentially displays the 3 + state could be benecial for the redox-aided inhibition as mentioned above. Thus, in the present work, we investigated the effect of a neodymium-decorated graphene oxide layer to assess its corrosion inhibition activity in acidic environments in the Ti6Al4V alloy.…”

Experimental and DFT studies of porous carbon covalently functionalized by polyaniline as a corrosion inhibition barrier on nickel-based alloys in acidic media

“…The polyaniline benzenoid diamines, quinoid diamine, pyridine, and tertiary nitrogen non-bonding electrons lead to the chemisorption on the alloy surface. 56,57 Hence, the polyaniline fragment DE 1.0445 eV values are decreased and electrostatic potential 9743.6185 a.u values is increased indicates that polyaniline adsorbed on nickel alloy surface. In addition, positive charge of polyaniline nitrogen atom can improve the physisorption on the alloy surface to control the hydrogen evolution.…”