INFLUENCE OF WATER EXTRACTIONS FROM PLANT RAW MATERIALS ON THE CORROSION RESISTANCE OF METALS IN ACIDIC ENVIRONMENTS
DOI:
https://doi.org/10.32782/naturaljournal.12.2025.14Keywords:
metal corrosion, “green inhibitors”, acid corrosion, corrosion resistanceAbstract
The work is devoted to the study of the corrosion resistance of metals in an acidic environment with the addition of aqueous extracts from plants that are widely distributed in the Zaporizhia region: dandelion (Taraxacum officinale), sunflower (Helianthus annuus) and ragweed (Ambrosia artemisiifolia).The effect of water extracts was studied on rectangular samples of steel St1ps (carbon structural) and 30KhGSA (structural alloy), which are widely used for the manufacture of metal structures and parts in various industries. The research was conducted in a corrosive-aggressive environment – a 10% solution of sulfuric acid. The rate of corrosion of steel samples in an acidic environment was estimated by the gravimetric method using standard indicators. The results obtained showed a positive effect of all aqueous extracts from plant raw materials on St1ps steel. Also, a positive effect of sunflower extract, a mixture of ragweed extracts and other two plants on 30KhGSA steel in a sulfuric acid environment was revealed. The influence of surface treatment of samples on the intensity of the corrosion process was determined. The ends and holes of the steel plates showed lower corrosion resistance than the areas that were processed on a grinding and carousel machine and polished using a polishing head. Probably, one of the possible mechanisms of action of the studied aqueous plant extracts is the reduction of the corrosion rate by adsorption, i.e. the formation of a protective barrier on the metal surface. Based on the conducted studies, it is possible to recommend extracts from dandelion, sunflower and ragweed as promising substances for increasing the corrosion resistance of metals and creating new “green” inhibitors of acid corrosion.
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