Details

Autor(en) / Beteiligte

• Yasakau, K.A.
• Maltseva, A.
• Lamaka, S.V.
• Mei, Di
• Orvi, H.
• Volovitch, P.
• Ferreira, M.G.S.
• Zheludkevich, M.L.

Titel

The effect of carboxylate compounds on Volta potential and corrosion inhibition of Mg containing different levels of iron

Ist Teil von

• Corrosion science, 2022-01, Vol.194, p.109937, Article 109937

Ort / Verlag

Amsterdam: Elsevier Ltd

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Corrosion protection and surface properties of Magnesium (Mg) containing 51 ppm Fe (HP-Mg) and 341 ppm Fe (CP-Mg) were assessed by EIS, AFM/SKPFM, and photoluminescence spectroscopy in NaCl solutions with/without fumarate (Fum), 2,5-pyridinedicarboxylate (PDCA) and salicylate (Sal) carboxylates. The PDCA was effective in corrosion inhibition of HP-Mg and CP-Mg, while the Sal was efficient in inhibition of CP-Mg only. Volta potential (VPD) changes on Mg were evaluated considering the contribution of molecular dipoles and chemical dipoles due to interaction of carboxylate groups present in carboxylates with Mg. VPD of CP-Mg increased due to adsorption of Fe(III)-salicylate complexes and salicylate molecules. [Display omitted] •2,5-pyridinedicarboxylate inhibits corrosion of Mg with high and low iron levels.•Salicylate is an efficient corrosion inhibitor for Mg with high iron levels only.•Adsorption of salicylate (Sal) and FeIII-Sal complexes increase Volta potential of Mg.•Volta potential of pure Mg decreases after immersion in NaCl solution.