PLANT EXTRACTS AS CORROSION INHIBITORS FOR ALUMINUM ALLOY IN NaCL ENVIRONMENT - RECENT REVIEW

Abstract

In spite of the fact that aluminium and its combinations are regularly used like lightweight materials in a great deal of enterprises, they experience the ill effects of low erosion resistance. Corrosion is a natural phenomena that leads to the deterioration of the metal properties through its electrochemical interaction with the corrosive environment. The costs related to corrosion can be either direct (due to the replacement and maintenance) or indirect. A few strategies and methods have been utilized to mitigate corrosion in aluminium and its compounds under various conditions. Concerns raised over climate and human wellbeing have constrained industries to search for a more appropriate option for the protection of aluminium and its alloys from corrosion. This review emphasizes on the plant extracts applied for aluminium combination consumption restraint in NaCl medium. It summarizes the different techniques used for extraction. Additionally, an understanding to the adsorption isotherms has been discussed in brief.

Controlling Corrosion Using Non-Toxic Corrosion Inhibitors

“…The suitability of the extraction method depends on the polar or non-polar nature of the target compound, the size of the sample particles, and the presence of interfering materials. In addition, the selection of the solvent for extraction has to be rigorous and guarded as it should be based on the type of plant, part to be extracted, the availability of solvent, and the nature of the bioactive compounds [7]. Generally, extraction of polar compounds involves polar solvents, while nonpolar solvents are applied in extraction of nonpolar compounds.…”

“…Generally, extraction of polar compounds involves polar solvents, while nonpolar solvents are applied in extraction of nonpolar compounds. Several commonly used techniques [7,91] can be applied to separate and extract the required extract from the plants among them:…”

“…There are many mathematical equations called adsorption models that estimate the adsorbate amount in the absorbent at constant temperature. Most of the time, green inhibitors obey the Langmuir isotherm model, but some also adhere to the Freundlich and Frumkin isotherms [7].…”

“…It fights against corrosion without directly treating the metal, but intervenes through the medium. Its effectiveness depends on its ability to react with the surface of the metal to form a protective film, thereby reducing or providing protection against corrosion [7][8][9].…”

Corrosion Inhibition Efficiency of Steel by Mango Peel Extract in Hydrochloric Acid at Different Temperature

“…Plant extracts commonly contain a diverse range of bioactive constituents, including flavonoids, alkaloids, polyphenols, and organic acids which inherently exhibit antioxidative and anti-corrosive properties [11][12][13]. Besides that, the use of plant extracts is considered an environmentally friendly and sustainable alternative to traditional corrosion inhibitors.…”