Date Palm Seed Extract as a Green Corrosion Inhibitor in 0.5 M HCl Medium for Carbon Steel: Electrochemical Measurement and Weight Loss Studies

Abstract

In this work, the corrosion inhibiting properties of date palm seed extract (DSE) for carbon steel in 0.5 M hydrochloric acid (HCl) solution has been investigated using several techniques, including weight loss measurement, potentiodynamic polarisation (PDP), and electrochemical impedance spectroscopy (EIS). By adding the DSE concentrations in 0.5M HCI solution from 800 ppm to 2000 ppm, the inhibition efficiency (IE%) was improved with DSE concentration up to 1400 ppm. Highest IE% of 94 in weight loss, 92 in PDP, and 97 in EIS were all attained at an optimum DSE concentration of 1400 ppm. Further increasing the DSE concentration to 2000 ppm, IE% was shown to be decreased. Moreover, the PDP measurement indicated that DSE is a mixed-type inhibitor, affecting both cathodic and anodic partial reactions. From the Gas Chromatography and Mass Spectrometry (GC-MS) analysis, it was revealed that DSE is mainly composed of (wt.%) 36.0 lauric acid, 12.0 caprylic acid, and 10.7 myristic acid. This study revealed that DSE has it could serve as a green corrosion inhibitor for carbon steel in HCl medium.

Experimental and Theoretical Studies on Extract of Date Palm Seed as a Green Anti-Corrosion Agent in Hydrochloric Acid Solution

“…Besides, they are readily available and more environmentally friendly. Gas chromatography-mass spectrometry (GC-MS) results reportted by our research group show that DPS contains high levels of different acids, which formulas are indicated in Table 1 [16]. The importance of this class of acids is due to their molecular features.…”

“…In our previous study, an extract of date palm seed gave an inhibition of carbon steel corrosion ranging from 94% to 97% using electrochemical impedance spectroscopy and potentiodynamic polarization measurments, respectively [16]. Fatty acids are attractive candidates as corrosion inhibitors because they contain absorbable carboxyl functional groups for attachment to metal surfaces.…”

“…DFT methods were also used to compute the Fukui indices, Highest Occupied Molecular Orbital (E HOMO ) and Lowest Unoccupied Molecular Orbital (E LUMO ) energies. potentiodynamic polarization measurments, respectively [16]. Fatty acids are attractive candidates as corrosion inhibitors because they contain absorbable carboxyl functional groups for attachment to metal surfaces.…”

“…The active group of fatty acid molecules may interact with the metal protecting it from corrosion. potentiodynamic polarization measurments, respectively [16]. Fatty acids are attractive candidates as corrosion inhibitors because they contain absorbable carboxyl functional groups for attachment to metal surfaces.…”

Inhibitive impact of Terfeziaceae plant extract on nitric acid decomposition of copper

“…Meanwhile, Figure 12b displayed three distinct peaks in the C1s spectrum at 285.15, 285.57, and 288.71 eV. “The peak at 285.15 eV indicates C–C and C–H bonds of organic compounds, while the peak at 285.57 eV is attributed to C–OH and C–O–C bonds [59]. ” Furthermore, the presence of a peak at 288.71 eV suggests the adsorption of Terfeziaceae parts on the outer face, indicating the presence of C=O bonds [60].…”