Plant extracts as corrosion inhibitors for carbon steel in HCl media: A comprehensive review

• S. Bilgiç

Ankara University, Faculty of Science, Department of Physical Chemistry, 06100, Ankara, Turkey

Abstract: One of the methods for prevention of corrosion is the use of chemical compounds called inhibitors in corrosive mediums. Inhibitors can be organic or inorganic compounds depending on the medium and environment examined. Generally, synthetic organic compounds provide highly effective protection against corrosion of metals and alloys. However, the problem with the current corrosion inhibitors is generally produced using toxic and harmful chemicals that can be hazardous to human health and environment. It would be useful if the current corrosion inhibitors could be replaced by materials that require less chemicals for their production for their production, especially organic corrosion inhibitors, more natural and safe materials to reduce the harmful effects to the human health and environment. This situation has prompted the search for natural and green corrosion inhibitors. Especially in recent years, the use of plant extracts that have inhibitory effects in corrosive environment has been subject of many researches and publications. In this review study, plant extracts that have an inhibitory effect on the corrosion of carbon steel, which have an important place in industrial applications, strongly acidic environments are examined and summarized. For this purpose, the inhibition properties of several leaves, seeds, roots, wastes and essential oils of plant extracts as corrosion inhibitors in different HCl environments are compiled.

Keywords: carbon steel, corrosion, inhibitors, plant extracts

Int. J. Corros. Scale Inhib., 2025, 14, no. 2, 503-559
doi: 10.17675/2305-6894-2025-14-2-6

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