review · RSC Advances
Corrosion causes severe degradation of materials, prompting the continuous development of protective measures such as chemical inhibitors. A comprehensive analysis examines inorganic, organic, and eco-friendly formulations, detailing how their molecular mechanisms prevent material degradation. Organic compounds display notable protective efficiency due to the presence of heteroatoms and conjugated pi-electron systems. In response to environmental concerns, sustainable alternatives such as naturally derived biopolymers are emerging as viable candidates. Combining different compounds, particularly organic with organic systems, generates synergistic effects that provide superior protection in aggressive processing conditions. The performance of these inhibitors is typically evaluated using weight loss testing, electrochemical analysis, surface characterisation, quantum mechanical calculations, and thermodynamic isotherm models. These compiled insights help clarify the functional behaviour of inhibitors to support the design of durable and environmentally sound protection strategies.
Corrosion degrades vital equipment and infrastructure, resulting in costly maintenance, downtime, and material waste. Understanding how traditional and bio-based inhibitors function allows engineers to select effective, non-toxic alternatives. Shifting towards sustainable inhibitors, such as natural biopolymers, helps protect industrial metals while reducing the environmental impact of hazardous chemical treatments.
This work informs engineers, chemical manufacturers, and maintenance professionals seeking protective treatments for demanding processing environments. The commercial focus centres on developing eco-friendly inhibitors from natural biopolymers and formulating synergistic organic mixtures. Because the underlying research synthesises experimental case studies, testing methods, and theoretical models, the technologies discussed range from early-stage formulation research to laboratory-tested candidates that require further field testing for commercial deployment.
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Effective corrosion control strategies are highly desired to reduce the fate of corrosion. One widely adopted approach is the use of corrosion inhibitors, which can significantly mitigate the detrimental effects of corrosion. This systematic review provides a thorough analysis of corrosion inhibitors, including both inorganic and organic compounds. It explores the inhibition mechanisms, highlighting the remarkable inhibitive efficiency of organic compounds attributed to the presence of heteroatoms and conjugated π-electron systems. The review presents case studies and investigations of corrosion inhibitors, shedding light on their performance and application potential. Moreover, it compares the efficacy, compatibility, and sustainability of emerging environmentally friendly corrosion inhibitors, including biopolymers from natural resources as promising candidates. The review also highlights the potential of synergistic impacts between mixed corrosion inhibitors, particularly organic/organic systems, as a viable and advantageous choice for applications in challenging processing environments. The evaluation of inhibitors is discussed, encompassing weight loss (WL) analysis, electrochemical analysis, surface analysis, and quantum mechanical calculations. The review also discusses the thermodynamics and isotherms related to corrosion inhibition, further improving the understanding of inhibitor's behavior and mechanisms. This review serves as a valuable resource for researchers, engineers, and practitioners involved in corrosion control, offering insights and future directions for effective and environmentally friendly corrosion inhibition strategies.
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DOI: 10.1039/d4ra05662k
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