Corrosion Inhibitive Behavior and Adsorption of Millet (Panicum miliaceum) Starch on Mild Steel in Hydrochloric Acid Environment

Nwanonenyi, S. C.; Arukalam, Innocent O.; Obasi, Henry Chinedu; Ezeamaku, U. Luvia; Eze, Innocent Ochiagha; Chukwujike, Iheoma C.; Chidiebere, Maduabuchi A.

doi:10.1007/s40735-017-0115-y

Cited by 11 publications

(7 citation statements)

References 37 publications

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“…If it is believed that in inhibited solution corrosion occurs on the remaining free surfaces after some sites have been barricaded effectively by the adsorbed inhibitor film such that the covered surfaces have negligible rates of corrosion, the degree of surface coverage (θ) and inhibition efficiency (%I) can be computed according to the following Eqs. (2 and 3) stated below [25]:…”

Section: Inhibition Efficiencymentioning

confidence: 99%

“…The protective film on the metal surface resulting from the adsorption of the inhibitor on the surface during acid induced corrosion regulates the corrosive effect on the metal surface by either homogenous or heterogenous layer adsorption [12]. The adsorption isotherm model (regression model) based on the degree of surface coverage data provides the information about the interactions between the inhibitor molecules themselves as well as their interactions with the metal surface [25]. The values of the degree of surface coverage (θ) evaluated from hydrogen gas evolution measurement using Eq.…”

Section: Regression Analysis (Adsorption Isotherms)mentioning

confidence: 99%

“…The improvement in the effectiveness of the inhibitor by combining two or more materials as a single corrosion inhibitor has been made available in the scientific literature by many researchers [12,20,25,32,33]. This enhancement in inhibitor effectiveness is attributed to synergistic effect due to the availability of more adsorption centres within the inhibitor.…”

Section: Effect Of Sp and Pvp Mixture As Corrosion Inhibitormentioning

confidence: 99%

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Inhibition of Carbon Steel Corrosion in 1 M H2SO4 Using Soy Polymer and Polyvinylpyrrolidone

et al. 2018

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The inhibition of carbon steel corrosion induced in 1 M H 2 SO 4 by soy polymer (SP) from an extract of Glycine Mac-L and polyvinylpyrrolidone (PVP) respectively was investigated at 30-60 °C using hydrogen gas evolution, potentiodynamic polarization and quantum chemical computation technique respectively. Results obtained from hydrogen gas evolution technique revealed that SP and PVP respectively acted as an inhibitor for corrosion of carbon steel in 1 M H 2 SO 4 solution. The increase in inhibition efficiency (IE%) of SP and PVP reached a maximum at 89.5% and 84.36% respectively, and the increment was found to be dependent on inhibitor concentration. The combination of mixture of SP and PVP as single inhibitor showed better inhibition improvement compared to individual inhibitor. Temperature study reveals that inhibition efficiency decreased with a rise in temperature suggesting physical adsorption. The computed parameters for the activation energies and heat of adsorption of the corrosion process supported the physical adsorption mechanism proposed. Regression analysis (adsorption isotherm model) was used to approximate the adsorption characteristics of the SP and PVP. Polarization data revealed that SP and PVP respectively adsorption acted as a mixed type inhibitor and also affected the anodic and cathodic partial reactions process. Quantum chemical computations were performed using the density functional theory to establish a clear link existing between the effectiveness of the inhibitor and its electronic properties.

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Section: Inhibition Efficiencymentioning

confidence: 99%

Section: Regression Analysis (Adsorption Isotherms)mentioning

confidence: 99%

Section: Effect Of Sp and Pvp Mixture As Corrosion Inhibitormentioning

confidence: 99%

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Inhibition of Carbon Steel Corrosion in 1 M H2SO4 Using Soy Polymer and Polyvinylpyrrolidone

et al. 2018

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“…has received detailed attention as anti-corrosion material. Some of these natural materials particularly plant materials, proteins, biopolymer and amino acids have been reported to function as effective corrosion preventing additives [5][6][7][8][9][10]. Plant materials are viewed to contain rich chemical compounds that can be extracted by simple methods and some of these chemicals are known to resemble the synthetic organic corrosion retarding compounds and have been proven to function as effective as their synthetic counterparts.…”

Section: Introductionmentioning

confidence: 99%

Experimental and computational studies of the corrosion inhibitive effects of Zingiber officinale rhizomes on mild steel corrosion in acidic solutions

Adindu,

Nwanonenyi,

Ikpa

2023

J. Nig. Soc. Phys. Sci.

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The study investigates the anticorrosion potentials of Zingiber officinale (ZO) on mild steel induced in 1.0 M HCl and 0.5 M H2SO4 acid solution respectively using structural characterization (gas chromatography-mass spectroscopy, GC-MS and Fourier transform infrared spectroscopy, FTIR) and electrochemical (electrochemical impedance spectroscopy, EIS and potentiodynamic polarization, PDP) techniques respectively and theoretical simulations. The structural characterization was performed to identify chemical constituents and functional groups present in the plant extract whereas electrochemical techniques and theoretical computations were used to examine the anticorrosion potentials of the extract and validate the experimental results. The GC-MS result revealed the presence of twenty-three (23) compounds within the extract and out of which three (1-(1,5-dimethyl-4-hexenyl)-4-methyl-, dodecanoic acid and 9-Octadecenoic acid (Z)-2-hydroxy-1-(hydroxymethyl)ethyl ester) were selected for computational simulation and the results of FTIR revealed the presence of the following functional groups (O-H, C=C, C=O, C-C and C-H) in the ZO extract. The results of EIS revealed that extract of ZO exhibited corrosion inhibition efficieny of 82.7% and 93.6 % for mild steel in 1 M HCl and 0.5 M H2SO4 solution respectively at maximum inhibitor concentration of 1000 mg/L for mild steel. Also, PDP results revealed that ZO extract functioned as mixed inhibitor because both the anodic and cathodic reaction process was altered. The quantum chemical calculation results revealed that 9- Octadecenoic acid (Z)-2-hydroxy-1-(hydroxymethyl) ethyl ester had a good energy gap (\Delta E) compared to other two compounds, indicating its better adsorption interaction with the metal surface in sulfuric acid environment. This was further confirmed by its good adsorption energy of -355.55 Kcal/mol with mild steel surface in H2SO4 environment compared with -167.81Kcal/mol in HCl environment from the molecular dynamic simulation.

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“…Nwanonenyi et al (2017) studied the corrosion inhibition performance of millet starch (MS) in 30 ± 1 °C and 0.5 M HCl solution. The results show that MS has obvious inhibition effect on the corrosion of low carbon steel in acid solution, and the inhibition effect is proportional to the concentration of MS.Wu et al (…”

mentioning

confidence: 99%

Application of water-soluble polymer inhibitor in metal corrosion protection: Progress and challenges

Yihang

2022

Front. Energy Res.

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The use of corrosion inhibitors can effectively avoid the corrosion of metals and alloys, but the conventional organic/inorganic corrosion inhibitors have certain toxic and side effects and environmental pollution problems (including some expensive toxic reagents and catalysts), prompting researchers to turn their attention to the research of water-soluble polymer corrosion inhibitors with green environment friendly and low pollution. This paper reviews the action mechanism of polymer inhibitors, the research status of natural polymer inhibitors (chitosan-based inhibitors, cellulose and its derivatives inhibitors, other carbohydrate inhibitors, protein inhibitors) and synthetic polymer inhibitors (epoxy resin inhibitors, polyethylene glycol inhibitors, conductive polymer inhibitors), The purpose is to provide some reference for the development of eco-friendly metal coatings.

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Corrosion Inhibitive Behavior and Adsorption of Millet (Panicum miliaceum) Starch on Mild Steel in Hydrochloric Acid Environment

Cited by 11 publications

References 37 publications

Inhibition of Carbon Steel Corrosion in 1 M H2SO4 Using Soy Polymer and Polyvinylpyrrolidone

Inhibition of Carbon Steel Corrosion in 1 M H2SO4 Using Soy Polymer and Polyvinylpyrrolidone

Experimental and computational studies of the corrosion inhibitive effects of Zingiber officinale rhizomes on mild steel corrosion in acidic solutions

Application of water-soluble polymer inhibitor in metal corrosion protection: Progress and challenges

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