Corrosion Behaviour of Mild Steel in Acidic Medium in Presence of Aqueous Extract of <i>Allamanda Blanchetii</i>

Anand, B.; Balasubramanian, V.

doi:10.1155/2011/345095

Cited by 23 publications

(12 citation statements)

References 7 publications

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“…From the stock solution, 2-10% concentration of the extract was prepared using 1N hydrochloric acid. Similar kind of preparation has been reported in studies using aqueous plant extracts in the recent years [21][22][23][24][25][26][27][28][29][30].…”

Section: Preparation Of the Plant Extract The Leaves Of The Plantsmentioning

confidence: 60%

A Comparative Study of the Inhibitory Effect of the Extracts ofOcimum sanctum,Aegle marmelos, andSolanum trilobatumon the Corrosion of Mild Steel in Hydrochloric Acid Medium

Shyamala¹,

Kasthuri²

2011

International Journal of Corrosion

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A comparative study of the inhibitory effect of plant extracts, Ocimum sanctum, Aegle marmelos, and Solanum trilobatum, on the corrosion of mild steel in 1N HCl medium was investigated using weightloss method, electrochemical methods, and hydrogen permeation method. Polarization method indicates plant extracts behave as mixed-type inhibitor. The impedance method reveals that charge-transfer process mainly controls the corrosion of mild steel. On comparison, maximum inhibition efficiency was found in Ocimum sanctum with 99.6% inhibition efficiency at 6.0% v/v concentration of the extract. The plant extracts obey Langmuir adsorption isotherm. The SEM morphology of the adsorbed protective film on the mild steel surface has confirmed the high performance of inhibitive effect of the plant extracts. From hydrogen permeation method, all the plant extracts were able to reduce the permeation current. The reason for the reduced permeation currents in presence of the inhibitors may be attributed to the slow discharge step followed by fast electrolytic desorption step. Results obtained in all three methods were very much in good agreement in the order Ocimum sanctum > Aegle marmelos > Solanum trilobatum.

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Section: Preparation Of the Plant Extract The Leaves Of The Plantsmentioning

confidence: 60%

A Comparative Study of the Inhibitory Effect of the Extracts ofOcimum sanctum,Aegle marmelos, andSolanum trilobatumon the Corrosion of Mild Steel in Hydrochloric Acid Medium

Shyamala¹,

Kasthuri²

2011

International Journal of Corrosion

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“…It also confined that, the artificial sea water in antiseptic conditions accelerates to form a layer on the steel structure with two different layers after 30 days of exposure. In 2011, B Anand et al [14] told that, there is a broad use of mild steel in chemical industry under different conditions in handling acidic, alkaline and salt solutions. They also noticed that, chloride ions, nitrate ions and also sulphate ions in aqueous solution are notably responsible and expedite corrosion in mild steel.…”

Section: Published By: Blue Eyes Intelligence Engineering and Sciences mentioning

confidence: 99%

Axial Behavior of Corroded CHST Members Confined with AFRP Sheets

Modak¹,

Sivasankar²

2019

IJRTE

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Strengthening of structural members is a mechanism of promoting structures to upgrade its attainment under existing loads or to boost the fortitude of structural members to carry further loads. Any frailty at the time of designing or any other construction errors may lead to the cause of structural deterioration causing failures of the structural members. This paper presents an experimental study on the behavior of corroded Circular Hollow Steel Tubular (CHST) members strengthened with Aramid Fiber Reinforced Polymer (AFRP) composites. In this field, the experimental investigation is narrowed up to the usage of Glass Fiber Reinforced Polymer (GFRP) and Carbon Fiber Reinforced polymer (CFRP) and also in the application procedure i.e., the wrapping scheme. Prime advantages of AFRP over steel members are low weight, highly durable, corrosion resistance and easy applicability. The workability and the consonance of AFRP were studied in this paper to evaluate the confinement of AFRP in the strengthening effect of CHST members. The main deprivation of AFRP is the cost alone. So, in this experimental process, instead of going full wrapping, a special technique of spiral wrapping was adopted to get the closed confinement of AFRP. Totally twelve specimens were casted and tested to execute the experimental work including both control and wrapped specimens by controlling different parameters up to the failure mode. The experimental results uttered the increment in the load carrying capacity of the wrapped specimens. The involvement of AFRP in the better confinement was observed in the experimental results with the increase in the number of layers of AFRP strips. From the series of experiments, the results which were collected were compared with the control sample to determine the variation and then the axial stress-strain curve and load deflection curve were studied. It was also observed that, the local buckling was getting delayed with the increase in the number of layers of AFRP strips.

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“…The presence of these organic compounds in the acid media reduces the rate of electrochemical reactions by forming an adsorption layer on the metal surface and thereby blocking the reaction sites (Govindaraju et al, 2009;Anand & Balasubramanian, 2011;Zerga et al, 2009;MoraMendoza et al, 2002). The majority of organic compounds used as inhibitors in acid media contain hetero atoms, such as N, S, and O, through which the compounds are quickly adsorbed on the surface of metals and alloys and thereby retard the anodic dissolution of metals and alloys.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of Mild Steel Corrosion in Acid Medium

Shetty¹,

Shetty²

2017

IJTech

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Since inhibition is the simplest mechanism used for mitigating the corrosion of metals and alloys, particularly in acidic environments, the present work aims to investigate the inhibiting effect of N-benzyl-N′-phenyl thiourea (BPTU) and N-cyclohexyl-N′-phenyl thiourea (CPTU) on mild steel corrosion in 0.1M HCl medium using the Tafel extrapolation technique. Tafel experiments were conducted with ±250 mV vs. rest potential (RP) in steps of 20 mV from the cathodic side for recording the corrosion currents, and then, the Tafel plot of potential vs. current was drawn for determining the corrosion current density (icorr). The linear polarization method was also used for validating the Tafel results. It was performed by polarizing the specimen with ±20 mV vs. RP in steps of 5 mV, and the corrosion currents were noted. The plot of potential vs. current was drawn for calculating icorr. The study reveals that both BPTU and CPTU act as anodic inhibitors for mild steel in the HCl medium, and good inhibition efficiency (>97%) was evidenced from both the compounds even at elevated temperatures. The study also reveals that the investigated compounds get adsorbed quickly on the steel surface, following Temkin's adsorption isotherm. The kinetic parameters obtained from the study indicated that the inhibition was governed by a chemisorption mechanism and the presence of inhibitors substantially reduced the metal dissolution in the studied temperature range. The investigation shows that there was a good correlation between the Tafel extrapolation and linear polarization results.

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Corrosion Behaviour of Mild Steel in Acidic Medium in Presence of Aqueous Extract of Allamanda Blanchetii

Cited by 23 publications

References 7 publications

A Comparative Study of the Inhibitory Effect of the Extracts ofOcimum sanctum,Aegle marmelos, andSolanum trilobatumon the Corrosion of Mild Steel in Hydrochloric Acid Medium

A Comparative Study of the Inhibitory Effect of the Extracts ofOcimum sanctum,Aegle marmelos, andSolanum trilobatumon the Corrosion of Mild Steel in Hydrochloric Acid Medium

Axial Behavior of Corroded CHST Members Confined with AFRP Sheets

Inhibition of Mild Steel Corrosion in Acid Medium

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