TY - JOUR
T1 - Inhibition Action of Maltodextrin on Alkaline Corrosion of Zinc
AU - Pais, Mikitha
AU - Rao, Padmalatha
N1 - Funding Information:
Ms. Mikitha Pais is grateful to the Manipal Academy of Higher Education, India, for the fellowship.
Funding Information:
The authors are thankful to the Department of Chemistry, Manipal Institute of Technology, Manipal Academy of Higher Education, India for lab facilities, and to the Central Instrumentation Facilities of Manipal Academy of Higher Education, India, for extending required facilities.
Publisher Copyright:
© 2021, Allerton Press, Inc.
PY - 2021/5
Y1 - 2021/5
N2 - Abstract: The objective of the work is to introduce and establish the anticorrosion property of maltodextrin (MLD) on the alkaline corrosion of zinc in 0.1 M NaOH. The corrosion and inhibition studies were done by the weight loss method and potentiodynamic polarization (PDP) measurements. Conditions were optimized to get the maximum inhibition efficiency by varying the concentration of the inhibitor in the temperature range of 303–323 K. Activation and thermodynamic parameters were evaluated and discussed in detail. A suitable adsorption isotherm was proposed to fit the experimental results. Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Atomic-force microscopy (AFM), and Attenuated total reflection – Fourier-transform infrared spectroscopy (ATR-FTIR) studies were performed before and after the addition of the inhibitor to analyze the adsorption tendency of MLD onto the metal surface. It was found that the inhibition efficiency of MLD increases with an increase in its concentration and with temperature. The maximum efficiency of 81.1% was achieved for the addition of 0.3 g L–1 of MLD at 323 K. The obtained results fitted well into the Langmuir adsorption isotherm. Both the surface morphology studies and the spectroscopic investigations confirmed the adsorption of the studied inhibitor onto the metal surface.
AB - Abstract: The objective of the work is to introduce and establish the anticorrosion property of maltodextrin (MLD) on the alkaline corrosion of zinc in 0.1 M NaOH. The corrosion and inhibition studies were done by the weight loss method and potentiodynamic polarization (PDP) measurements. Conditions were optimized to get the maximum inhibition efficiency by varying the concentration of the inhibitor in the temperature range of 303–323 K. Activation and thermodynamic parameters were evaluated and discussed in detail. A suitable adsorption isotherm was proposed to fit the experimental results. Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), Atomic-force microscopy (AFM), and Attenuated total reflection – Fourier-transform infrared spectroscopy (ATR-FTIR) studies were performed before and after the addition of the inhibitor to analyze the adsorption tendency of MLD onto the metal surface. It was found that the inhibition efficiency of MLD increases with an increase in its concentration and with temperature. The maximum efficiency of 81.1% was achieved for the addition of 0.3 g L–1 of MLD at 323 K. The obtained results fitted well into the Langmuir adsorption isotherm. Both the surface morphology studies and the spectroscopic investigations confirmed the adsorption of the studied inhibitor onto the metal surface.
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U2 - 10.3103/S1068375521030121
DO - 10.3103/S1068375521030121
M3 - Article
AN - SCOPUS:85110332650
SN - 1068-3755
VL - 57
SP - 374
EP - 386
JO - Soviet surface engineering and applied electrochemistry
JF - Soviet surface engineering and applied electrochemistry
IS - 3
ER -