Volume 15, Issue 2 (9-2025)
مهندسی خوردگی 2025, 15(2): 26-26 |
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Evaluation and Comparison of the Corrosion Inhibition Performance of Extracts from Date Fruit and Seeds as Green Corrosion Inhibitors for Carbon Steel in Saline Environment. مهندسی خوردگی 2025; 15 (2) :26-26
URL: http://journal.ica.ir/article-1-251-en.html
URL: http://journal.ica.ir/article-1-251-en.html
Abstract: (4 Views)
This research investigates the comparative corrosion inhibition effectiveness of aqueous extracts of date fruit and date seed on the corrosion of low-carbon steel St37 in a 3.5 wt.% sodium chloride solution at 25°C during a 120-hour immersion period. Corrosion inhibition studies were performed using electrochemical impedance spectroscopy (EIS). Ultraviolet-visible (UV-Vis) spectroscopy and Fourier-transform infrared (FTIR) spectroscopy analyses were carried out to evaluate the adsorption performance of the inhibitors and to identify the organic compounds and functional groups present in the extracts. Surface characterization was conducted using field emission scanning electron microscopy (FESEM) equipped with energy dispersive X-ray spectroscopy (EDS). The aqueous extracts at a concentration of 1000 ppm inhibited steel corrosion in the aggressive sodium chloride solution. Among them, the date seed extract exhibited enhanced inhibition over time, achieving a corrosion resistance of 1522.258 Ω·cm². In contrast, the date fruit extract could protect the steel against corrosion only during the first 5 hours, reaching a maximum corrosion resistance of 1053.95 Ω·cm². Surface analyses and EIS results indicated that the corrosion inhibition mechanism likely involves the formation of a surface film through the adsorption of inhibitor molecules on the steel surface, leading to the formation of a complex containing organic compounds from the extracts and iron cations generated from anodic reactions on the steel surface.
Keywords: Corrosion inhibition, Date fruit and seed extracts, Saline environment, Low-carbon steel ST37, EIS, FTIR
Type of Study: Research |
Subject:
General
Received: 2026/01/31 | Accepted: 2025/09/21 | Published: 2025/09/21
Received: 2026/01/31 | Accepted: 2025/09/21 | Published: 2025/09/21
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