Engineering corrosion protection: the critical link between MgO nanoparticles synthesis and inhibition mechanism

Document Type : Research Article

Authors

Division for Material Science, School of Advanced Manufacturing Technologies, Tomsk Polytechnic University, Lenina Avenue 30, 634050 Tomsk, Russia

10.24200/sci.2026.68195.11025

Abstract

This study investigates the influence of synthesis methodology on the structural characteristics and corrosion inhibition performance of MgO nanoparticles for carbon steel 65 Mn. Nanopowders were synthesized via two contrasting routes: rapid microwave-assisted synthesis (MAS) and protracted sol-gel synthesis (S-GS). Comprehensive characterization revealed that MAS produced smaller, defect-rich nanoparticles with a higher impurity content, whereas S-GS yielded larger, more stoichiometric particles with superior phase purity. Corrosion inhibition efficiency was evaluated in 0.1 M HCl and 0.1 M NaCl environments using gravimetric and electrochemical techniques. Electrochemical impedance spectroscopy confirmed the formation of a more protective surface layer by the purer S-GS-MgO. The results establish a critical structure-property-performance triad, demonstrating that the synthesis pathway is a primary design parameter dictating phase purity and particle architecture, which in turn govern the dominant inhibition mechanism – from barrier formation in acid to interfacial pH modification in neutral media. The work validates a critical structure-property-performance triad, providing a foundational framework for the rational design of nano-inhibitors targeted for specific corrosive threats.

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Articles in Press, Accepted Manuscript
Available Online from 27 June 2026
  • Receive Date: 09 November 2025
  • Revise Date: 14 February 2026
  • Accept Date: 30 May 2026