article · ACS Omega
Industrial operations frequently encounter severe corrosion issues, prompting ongoing efforts to create effective protective compounds. Three novel, environmentally friendly Schiff base inhibitors derived from amino acids and 4-aminoacetophenone were evaluated for their ability to prevent Q235 carbon steel corrosion in hydrochloric acid solutions. Using potentiodynamic polarization and electrochemical impedance spectroscopy, the compounds were identified as mixed-type inhibitors that form a robust protective film on the metal surface, significantly reducing steel dissolution. At a concentration of 10 mM, the top performing compound achieved a protection efficiency of 96.01 percent, while the other two reached 93.15 percent and 77.03 percent. Advanced surface analysis techniques confirmed the direct adsorption of the inhibitor molecules onto the steel. Complementary computational simulations, including density functional theory and Monte Carlo calculations, detailed the electronic structures and adsorption geometries, aligning closely with the experimental results.
Metal corrosion causes substantial material degradation and financial loss across many industries that rely on acidic solutions. Developing ecofriendly inhibitors from amino acids offers a sustainable alternative to conventional, potentially hazardous chemical treatments. Understanding how these molecules bind to metal surfaces aids the design of non-toxic, high-performance protective solutions that prolong the lifespan of essential steel infrastructure.
This work could enable the development of greener chemical additives for industries managing steel equipment in acidic environments, such as chemical processing and manufacturing. The findings represent early-stage laboratory research, relying on electrochemical tests and computational modelling. Substantial scale-up, formulation development, and field testing in operational industrial conditions would be needed before these inhibitors reach commercial use.
AI-generated from the published abstract. Always read the original work before citing.
Corrosion poses a significant problem for several industrial sectors, inducing continuous research and development of corrosion inhibitors for use across a wide range of industrial applications. Here, we report the effectiveness of three newly developed Schiff bases derived from amino acids and 4-aminoacetophenone, namely, <b>AIP</b>, <b>AMB</b>, and <b>AImP</b>, as environmentally friendly corrosion inhibitors for Q235 steel in hydrochloric acid using electrochemical and surface analyses, in addition to theoretical techniques. The electrochemical findings of potentiodynamic polarization (PDP) demonstrated that the explored compounds serve as mixed-type inhibitors and can effectively suppress steel corrosion, with maximal protection efficiencies of 93.15, 96.01, and 77.03% in the presence of <b>AIP</b>, <b>AMB</b>, and <b>AImP</b>, respectively, at a concentration of 10 mM. The electrochemical impedance spectroscopy (EIS) and polarization results confirmed the growth of a durable protective barrier on the steel surface in the existence of the inhibitors, which is responsible for decreasing the metallic dissolution. Results were further supported by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), UV-vis, and Fourier transform infrared (FTIR), which ascribed the development of inhibitor-adsorption films on the steel surface. The results of EDS and XPS analyses demonstrated the existence of the distinctive elements of the inhibitors on the metallic surface. Furthermore, density functional theory (DFT) calculations and Monte Carlo (MC) simulations showed the electronic structure of the examined inhibitors and their optimized adsorption configurations on the steel surface, which helped in explaining the anticorrosion mechanism. Finally, the theoretical and experimental findings exhibit a high degree of consistency.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1021/acsomega.3c09688
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
