Corrosion is a major issue affecting metals, leading to economic loss and structural damage. Traditional corrosion inhibitors such as hexamethylene diamine (HMDA) are effective but pose environmental and health risks due to their toxicity and non-biodegradability. This study explores the use of orange peel powder and other natural substances as eco-friendly corrosion inhibitors. Orange peel contains bioactive compounds such as flavonoids, polyphenols, and ascorbic acid, which form a protective layer on metal surfaces and reduce corrosion rates. The results suggest that natural inhibitors are cost-effective, biodegradable, and sustainable alternatives to synthetic chemicals.
Reddy et al. (2026) studied this question.