Data on corrosion inhibition effect of Stylosanthes gracilis extract on UNS S30403 austenitic stainless steel in dilute acid solution

Ofuyekpone, Okiemute Dickson; Utu, Ochuko Goodluck; Onyekpe, Basil O.; Adediran, Adeolu Adesoji; Oki, Makanjuola

doi:10.1016/j.cdc.2021.100763

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…There have been numerous reports on the use of plant extracts as green metal inhibitors in acid solutions [7][8][9][10][11][12]. Watermelon rind, seed, and peel [7], Curcuma longa extract [8], Aloe Vera leaf extract [9], Cucumis sativus peel extract [10], Salvia hispanica [11], Glycyrrhiza glabra leaf extract [12], Stylosanthes gracilis leaf extract [13][14][15] and Centrosema pubescens leaf extract [16] were investigated for their inhibition properties. Nonetheless, more research on other plants that can be used as corrosion inhibitors in industrial applications is required.…”

Section: Introductionmentioning

confidence: 99%

Non-toxic leguminous plant leaf extract as an effective corrosion inhibitor of UNS S30403 in 1 M HCl

Ofuyekpone

Adediran

Utu

et al. 2022

J. Electrochem. Sci. Eng.

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Weight loss, polarization, and open circuit potential methods were used to investigate the corrosion inhibitory impact of Centrosema pubescens leaf extract on 304L austenitic stainless steel UNS S30403 in 1 M hydrochloric acid. This non-toxic extract behaves as a mixed-type inhibitor according to the polarization curves, thermodynamics and activation parameters. Both the weight loss calculations and potentiodynamic polarization investigations showed that 1.2 g L-1 was the optimal concentration of the leaf extract. While the weight loss method gave inhibition efficiency of 86.84 and 75.00 % after 10 and 60 days of immersion at the optimum concentration, polarization studies revealed inhibition efficiencies of 93.08 and 98.66 % at 303 and 333 K, respectively. The extract molecules adhered to the UNS S30403 surface according to Langmuir adsorption isotherm. The presence of the protective film on the UNS S30403 surface was confirmed by SEM, EDX, and XRD measurements. The inhibition performance of the leaf extract was noted to be a function of the extract concentration, immersion time and temperature. The FTIR analysis indicated an interaction between austenitic stainless steel UNS S30403 and the molecules of Centrosema pubescens leaf extract.

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