The inhibition effects of methionine on mild steel in acidic media

Jano, Albana; Lame, Alketa; Kokalari, Efrosini

doi:10.2478/auoc-2014-0007

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…The presence of R-S-R in molecular structure of methionine provokes an increase of the inhibition efficiency, which can be attributed to the fact that the sulfur containing amino acids can be adsorbed as bidentate ligands in which surface coordination is taking place through both the amino group (or carboxylic group) and the -Smoiety. (8,9,3) In the other hand, lysine adsorbs on surface of middle steel this mechanism: the atoms O and N in amino acids serve as active centers for the process of adsorption on the metal surface. Availability of no bonded (lone pair) and p-electrons in inhibitor molecules facilitate electron transfer from the inhibitor to the metal.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Corrosion Protection Efficiency of Two Kinds of Amino Acids

Jano¹,

Kokalari²,

Lame³

et al. 2021

World Congress on Mechanical, Chemical, and Material Engineering

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Corrosion is an inevitable natural phenomenon. The amino acids are green corrosion inhibitors due to their nontoxicity and biodegradability. For this reason they are a good choice for corrosion protection. As inhibitors, we have used two amino acids, lysine and methionine. They have shown good inhibitor properties in protection of low allow carbon steel against the corrosion in acidic media. The aim of this study is to compare corrosion protection efficiency of these amino acids. Material under investigation is low alloy carbon steel marked as: Steel 39, Steel 44 and the corrosion media is: 1M H2SO4 + 10 -3 mol/L Cl -(in form of NaCl). A Tafel polarization technique was used for investigation of corrosion inhibitor efficiency. The results present that methionine is more protective again acidic corrosion and the steel 44 is more sustainable again sulfuric acidic corrosion. The best case in the respect of corrosion sustainability for steel 44 is in presence of 1g/L methionine with protection efficiency respectively 81.27%.

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Section: Discussionmentioning

confidence: 99%

Comparison of Corrosion Protection Efficiency of Two Kinds of Amino Acids

Jano¹,

Kokalari²,

Lame³

et al. 2021

World Congress on Mechanical, Chemical, and Material Engineering

Self Cite

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show abstract

“…It is cheap and friendly with environment. Extract (locust bean gum) and MCI (methionine + butanolamine) tested have been reported to be excellent inhibitors for Iron B 500 in 1 M H2SO4 solution in presence of chloride ions 1•10 -3 M [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Test of inhibitors for preventing corrosion of steel reinforcement in concrete

Jano

Lame

Kokalari

2021

Ovidius University Annals of Chemistry

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Concrete is more widely used than any other manmade material. The objective of this paper is to investigate the behavior of reinforced cement when migration corrosion and guar gum inhibitors are used. The concrete samples were exposed in aggressive media H2SO4 1 M and in the presence of 1∙10-3 M Cl-. Electrochemical measurements such as half-cell potential, polarization resistance and Tafel extrapolation methods were performed in order to obtain information on the corrosion behavior of the reinforcing steel in cement mortar. Results demonstrate high resistance polarization and low corrosion rate for concrete sample with inhibitor. The corrosion rate decreases approximately 95% in presence of locust bean gum and 80% in presence of migration inhibitor.

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A review of amino acids used as corrosion inhibitors on iron metal/alloys in aggressive environments

Ekeke¹,

Efe²,

Nwadire³

2022

Zaštita materijala

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Research into the use of safe and environmentally friendly corrosion inhibitors can pave the way for an understanding of their inhibition mechanisms in metallic alloy materials. This review seeks to present and discuss the research work reported in the literature on the use of amino acids and their derivatives as corrosion inhibitors for iron and its alloys in different aggressive solutions. This non-toxic, biodegradable and relatively cheap corrosion inhibitor has shown to be efficient as an inhibitor for metals/alloys in acidic, alkaline and neutral solutions depending on experimental conditions. Electrochemical and surface techniques were among the most often used techniques to evaluate the corrosion inhibition efficiency of amino acids. Highest values of inhibition efficiency can be obtained in the presence of ions as Iand Br. This review presents and discusses most of the contributions made in literature on the use of amino acids and their derivatives as corrosion inhibitors for iron and its alloys.

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The inhibition effects of methionine on mild steel in acidic media

Cited by 3 publications

References 6 publications

Comparison of Corrosion Protection Efficiency of Two Kinds of Amino Acids

Comparison of Corrosion Protection Efficiency of Two Kinds of Amino Acids

Test of inhibitors for preventing corrosion of steel reinforcement in concrete

A review of amino acids used as corrosion inhibitors on iron metal/alloys in aggressive environments

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