Corrosion Inhibition of Mild Steel in Sulphuric Acid Environment Using Millet Starch and Potassium Iodide

Nwanonenyi, S. C.; Madufor, I. C.; Uzoma, Paul C.; Chukwujike, Iheoma C.

doi:10.9734/irjpac/2016/27881

Cited by 22 publications

(13 citation statements)

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“…Furthermore, it is observed that inhibition efficiency of 90.48% was obtained at the highest inhibitor concentration. The result of inhibition efficiency exhibited by wheat starch and starch from millet reported elsewhere [22,23] in regulating corrosion of metal in aggressive environment varies. The variation could be attributed to the following factors.…”

Section: Weight Loss Measurement Resultmentioning

confidence: 97%

“…Corrosion of metal and alloy is a degradation of metal and alloy as a result of environment surrounding them. It is a non preventable phenomenon but can be controlled through the use of some macromolecules [1][2][3][4][5][6][7][8][9][10], organic compounds [11][12][13][14][15][16] or extracts from natural plants [17][18][19][20][21][22][23] as corrosion inhibitors. Polymers are macromolecules formed by the repetition of smaller molecules (monomers) that are covalently bonded together.…”

Section: Introductionmentioning

confidence: 99%

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Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch

Nwanonenyi

Ogbobe

Oguzie

2017

IJET

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The corrosion of mild steel in 0.5 M H2SO4acid solution and the inhibition process by wheat starch (WS) was investigated using weight loss and potentiodynamic polarization measurement techniques respectively. Gravimetric results revealed that there is significant reduction in the corrosion rate of mild steel in the presence of inhibited solution compared to blank solution, and also the inhibition efficiency was found to depend on the concentration of the WS. Data on potentiodynamic polarization results confirmed that WS exhibited mixed type inhibition behaviour, though the cathodic effect was more pronounced. The mode of WS adsorption on the corroding metal surface followed Langmuir isotherm model. In addition, the trend of inhibition efficiency with temperature, activation energy and heat of adsorption parameters revealed a strong interaction between the WS constituents and the corroding metal surface, thus indicating that WS lowered the corrosion process by blanketing the mild steel surface through chemical adsorption mechanism. The mechanism of inhibition was discussed in the light of the chemical structure of starch.

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Section: Weight Loss Measurement Resultmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch

Nwanonenyi

Ogbobe

Oguzie

2017

IJET

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“…The adsorption isotherms (regression models) were used to study the inhibition adsorption process, that is, to determine the mode of inhibition adsorption for the corrosion reaction process. Also, it was done to present the importance of using regression models and its methodology in interpreting corrosion inhibition results [16][17][18][19]. Regression isotherm models used in the research include; Temkin, Freundlich and Langmuir adsorption isotherm.…”

Section: Regression Analysis (Adsorption Isotherms)mentioning

confidence: 99%

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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“…The methods of decreasing starch crystalline regularity include drying such as extrusion, drum drying or spray drying, enzymatic degradation processes [20,21], chemical processes, such as acidolysis, oxidation [22], and physical processes, such as heat-moisture treatment, radioactive degradation, microwave degradation, ultrasonic degradation and extrusive degradation processes.). A number of studies have focused on the corrosion inhibition performance of native starches [7,23], modified starches [9,[24][25][26][27][28][29] and synergistic studies of starch with other compounds [3,30].…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition of galvanized steel in hydrochloric acid medium by a physically modified starch

et al. 2020

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Native starch extracted from sweet potato tubers was modified via extrusion. The native starch and modified starch were characterized by Fourier transform infrared (FTIR) spectroscopy, which revealed slight modifications in peak position and intensities on starch modification. The modified starch was evaluated as a corrosion inhibitor of galvanized steel in 1 M HCl solution by gravimetric and potentiodynamic polarization measurement techniques. Results obtained from gravimetric measurement reveals that the modified starch inhibition efficacy was dependent on time, concentration and temperature, increasing with increase in concentration and decreasing with increase in time of immersion and temperature of the system. Maximum inhibition efficiency of 64.26% was obtained at a concentration of 0.7 g/L PMS. Also, result from polarization technique indicated that the modified starch belonged to a mixed-type inhibitor. Adsorption of the inhibitor on the galvanized steel surface was found to obey the Langmuir adsorption isotherm.

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Corrosion Inhibition of Mild Steel in Sulphuric Acid Environment Using Millet Starch and Potassium Iodide

Cited by 22 publications

References 0 publications

Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch

Protection of Mild Steel Corrosion in Sulphuric Acid Environment Using Wheat Starch

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

Corrosion inhibition of galvanized steel in hydrochloric acid medium by a physically modified starch

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