Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2023 Dec 8;4(1):67-84.
doi: 10.1021/acsphyschemau.3c00055. eCollection 2024 Jan 24.

Investigation of Corrosion Inhibition of Mild Steel in 0.5 M H2SO4 with Lachancea fermentati Inhibitor Extracted from Rotten Grapefruits (Vitis vinifera): Adsorption, Thermodynamic, Electrochemical, and Quantum Chemical Studies

Baluchamy Tamilselvi  1   2 , Durvas Seshian Bhuvaneshwari  1 , Periyakaruppan Karuppasamy  3 , Sethuramasamy Padmavathy  4 , Santhosh Nikhil  5 , Surendra Boppanahalli Siddegowda  3 , H C Ananda Murthy  6   7
Affiliations

Investigation of Corrosion Inhibition of Mild Steel in 0.5 M H2SO4 with Lachancea fermentati Inhibitor Extracted from Rotten Grapefruits (Vitis vinifera): Adsorption, Thermodynamic, Electrochemical, and Quantum Chemical Studies

Baluchamy Tamilselvi et al. ACS Phys Chem Au. .

Abstract

Corrosion inhibition of mild steel (MS) was studied using Lachancea fermentati isolate in 0.5 M H2SO4, which was isolated from rotten grapes (Vitis vinifera) via biofilm formation. Biofilm over the MS surface was asserted by employing FT-IR and FE-SEM with EDXS, electrochemical impedance spectroscopy (EIS), AFM, and DFT-ESP techniques. The weight loss experiments and temperature studies supported the physical adsorption behavior of the corrosion inhibitors. The maximum inhibition efficiency (IE) value (90%) was observed at 293 K for 9 × 106 cfu/mL of Lachancea fermentati isolate. The adsorption of Lachancea fermentati isolate on the surface of MS confirms Langmuir's adsorption isotherm model, and the -ΔG values indicate the spontaneous adsorption of inhibitor over the MS surface. Electrochemical studies, such as potentiodynamic polarization (PDP) and EIS were carried out to investigate the charge transfer (CT) reaction of the Lachancea fermentati isolate. Tafel polarization curves reveal that the Lachancea fermentati isolate acts as a mixed type of inhibitor. The Nyquist plots (EIS) indicate the increase in charge transfer resistance (Rct) and decrease of double-layer capacitance (Cdl) values when increasing the concentration of Lachancea fermentati isolate. The spectral studies, such as UV-vis and FT-IR, confirm the formation of a complex between MS and the Lachancea fermentati isolate inhibitor. The formation of biofilm on the MS surface was confirmed by FE-SEM, EDXS, and XPS analysis. The proposed bioinhibitor shows great potential for the corrosion inhibition of mild steel in acid media.

PubMed Disclaimer

Conflict of interest statement

The authors declare no competing financial interest.

Figures

Scheme 1
Scheme 1. Yeast Isolation Method from Black Grapes
Figure 1
Figure 1
(a) Effect of different concentrations of Lachancea fermentati isolate (106 cfu/mL) on corrosion rate (mpy), (b) inhibition efficiency (%) at different temperatures from 293 to 313 K, and (c) effect of time (h) on inhibition efficiency (%) in different concentrations of Lachancea fermentati isolate in 0.5 M H2SO4 at 293 K.
Figure 2
Figure 2
Adsorption isotherm: (a) Langmuir adsorption isotherm plot of different concentrations of Lachancea fermentati isolate (106 cfu/mL) in 0.5 M H2SO4 at 293 K and (b) adsorption isotherm plot of lnkads vs 1000/T (K–1) for the adsorption of Lachancea fermentati isolate (106 cfu/mL) on the surface of MS at 293 K.
Figure 3
Figure 3
(a) Arrhenius plot [log(CR) vs 1000/T] and (b) Transition state plot [log(CR/T) vs 1000/T] for the adsorption of Lachancea fermentati isolate (106 cfu/mL) on the surface of MS at 293 K.
Figure 4
Figure 4
Open circuit potential. Potentiodynamic polarization curves for MS with and without Lachancea fermentati isolate (106 cfu/mL) at 293 K: in (a) 0.5 M H2SO4, (b) 6 mL of Lachancea fermentati isolate (−508 mV), (c) 7 mL of Lachancea fermentati isolate (−485 mV), (d) 8 mL of Lachancea fermentati isolate (−494 mV), (e) 9 mL of Lachancea fermentati isolate (−496 mV), and (f) 10 mL of Lachancea fermentati isolate (∼494 mV).
Figure 5
Figure 5
Stimulation of Nyquist (a) and Bode (b,c) plots with equivalent circuit of Lachancea fermentati isolate (106 cfu/mL) on the mild steel in 0.5 M H2SO4 solution.
Figure 6
Figure 6
(a) Nyquist, (b) Bode total impedance, and (c) phase angle plots against frequency (Hz) for MS immersed in 0.5 M H2SO4 in the presence and absence of Lachancea fermentati isolate (106 cfu/mL) at 293 K.
Figure 7
Figure 7
Tafel plot for MS immersed in 0.5 M H2SO4 in the presence and absence of Lachancea fermentati isolate (106 cfu/mL) at 293 K.
Figure 8
Figure 8
UV–visible spectrum of solution containing 0.5 M H2SO4 before (a) and after (b) the MS immersed in 9 × 106 cfu/mL of Lachancea fermentati isolate.
Figure 9
Figure 9
FT-IR spectrum of (a) 9 × 106 cfu/mL of Lachancea fermentati isolate and (b) Lachancea fermentati isolate scratched from MS surface after immersion in 0.5 M H2SO4 with 9 × 106 cfu/mL of Lachancea fermentati isolate.
Figure 10
Figure 10
(a) FE-SEM of polished MS; (a1) overall mapping elements on the same spot corresponding to (a2) EDXS micrograph and (a3) carbon, (a4) oxygen, and (a5) Fe mapping analysis of polished MS. (b) FE-SEM of corroded MS; (b1) overall mapping elements on the same spot corresponding to (b2) EDXS micrograph and (b3) carbon, (b4) oxygen, (b5) Fe, and (b6) sulfur mapping analysis of MS immersed in 0.5 M H2SO4. (c) FE-SEM of mild steel; (c1) overall mapping elements on the same spot corresponding to (c2) EDXS micrograph and (c3) carbon, (c4) oxygen, (c5) Fe, and (c6) sulfur mapping analysis of mild steel immersed in 0.5 M H2SO4 containing (9 × 106 cfu/mL) Lachancea fermentati isolate.
Figure 11
Figure 11
XPS spectra of (a) C 1s, (b) N 1s, (c) O 1s, and (d) Fe 2p3/2. (e) XPS survey scan spectrum of Lachancea fermentati isolate biofilm adhesion on MS surface at an exposure time of 3 h in 0.5 M H2SO4 and 9 × 106 cfu/mL of Lachancea fermentati isolate.
Figure 12
Figure 12
AFM images of (a,a1) polished MS surface, (b,b1) MS immersed in 0.5 M H2SO4, and (c,c1) MS immersed in 0.5 M H2SO4 containing 9 × 106 cfu/mL of Lachancea fermentati isolate.
Figure 13
Figure 13
Optimized structures of HOMO an LUMO with ESP for Lachancea fermentati isolate.
Figure 14
Figure 14
Short explanation of optimized structures of HOMO and LUMO with ESP for Lachancea fermentati isolate.
Scheme 2
Scheme 2. Suitable Corrosion Inhibition Mechanism for MS in the Presence of Lachancea fermentati Inhibitor in 0.5 M H2SO4
See this image and copyright information in PMC

References

    1. Fiori-Bimbi M. V.; Alvarez P. E.; Vaca H.; Gervasi C. A. Corrosion inhibition of mild steel in HCl solution by Pectin. Corros. Sci. 2015, 92, 192–199. 10.1016/j.corsci.2014.12.002. - DOI
    1. Alaneme K. K.; Olusegun S. J.; Adelowo O. T. Corrosion inhibition and adsorption mechanism studies of Hunteria umbellate seed husk extracts on mild steel immersed in acidic solutions. Alex. Eng. J. 2016, 55 (1), 673–681. 10.1016/j.aej.2015.10.009. - DOI
    1. Singh D. K.; Kumar S.; Udayabhanu G.; John R. P. 4(N,N-dimethylamino) benzaldehyde nicotinic hydrazone as corrosion inhibitor for mild steel in 1M HCl solution: An experimental and theoretical study. J. Mol. Liquid. 2016, 216, 738–746. 10.1016/j.molliq.2016.02.012. - DOI
    1. Koch G. H.; Brongers M. P. H.; Thompson N. G.; Virmani Y. P.; Payer J. H.. Corrosion costs and preventive strategies in the United States. Report FHWA-RD-01–156, 2003.
    1. Zuo R. Biofilms:strategies for metal corrosion inhibition employing microorganism. Appl. Microbiol. Biotechnol. 2007, 76 (6), 1245–1253. 10.1007/s00253-007-1130-6. - DOI - PubMed

LinkOut - more resources