Investigation of the effect of different amino‐acid derivatives on the inhibition of NST‐44 carbon steel corrosion in cassava fluid

., M. Alagbe; Umoru, L.E.; Afonja, A.A.; Olorunniwo, O. E.

doi:10.1108/00035590910923455

Cited by 13 publications

(3 citation statements)

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“…The statistical distribution of better-fit of the CR test-data also find usefulness for the estimations of surface coverage (θ) and inhibition efficiency (η) performance of R. mangle L. leaf-extract admixture on the reinforcing steel corrosion in the concrete samples using the relationships (Okeniyi, 2014;Alagbe et al, 2006 The mean values of electrochemical corrosion test-data, HCP, ECC and CR, obtained from the probability distribution fittings, by the Normal and by the Weibull distributions, are plotted in Fig. 1.…”

Section: Model-estimations Of Surface Coverage and Inhibition Efficiementioning

confidence: 99%

Evaluation and Analyses of Rhizophora mangle L. Leaf-Extract Corrosion-Mechanism on Reinforcing Steel in Concrete Immersed in Industrial/Microbial Simulating-Environment

Okeniyi¹,

Loto²,

Popoola³

2015

J. of Applied Sciences

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Rhizophora mangle L. leaf-extract admixed steel-reinforced concretes for detailing mechanism of the extract on steel-rebar corrosion in 0.5 M H 2 SO 4 (simulating industrial/microbial environment). These electrochemical test-measurements, including corrosion potential, corrosion current and corrosion rate, were subjected to the analyses of probability distributions as per ASTM G16-95 R05 through the Kolmogorov-Smirnov goodness-of-fit test-statistics. Results showed that corrosion rate exhibited correlations with function of the natural plant-extract concentration and compact series of the inverse electrochemical noise resistance; the ratio of standard deviations of corrosion potential and corrosion current. Both the experimental and the correlated-prediction model identified Rhizophora mangle L. leaf-extract admixture concentrations that exhibited inhibition efficiency performance of η>70% on steel-rebar corrosion in the acidic test-medium. The adsorption isotherm modelling of the experimental and the predicted electrochemical test-results exhibited good agreements by following the Langmuir and Flory-Huggins isotherm fittings. In addition, the study identified physisorption as the prevalent corrosion-protection mechanism of the steel-rebar by the plant extract through both of the experimental and the correlated-prediction models of adsorption isotherm analyses.

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Section: Model-estimations Of Surface Coverage and Inhibition Efficiementioning

confidence: 99%

Evaluation and Analyses of Rhizophora mangle L. Leaf-Extract Corrosion-Mechanism on Reinforcing Steel in Concrete Immersed in Industrial/Microbial Simulating-Environment

Okeniyi¹,

Loto²,

Popoola³

2015

J. of Applied Sciences

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“…The cyanide contents of cassava have been identified by many investigators as the main species responsible for corrosion (Alagbe et al, 2005). Effort also has been made to study the effect of cassava fluid on corrosion performance of mild steel.…”

Section: Studies On Some Corrosive Mediamentioning

confidence: 99%

Effects of coolants on the welding zone of mild steel rods in corrosive media

Adeyemi¹,

Odetayo²

2013

AJSIR

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The study on corrosion rate of welded mild steel rods in two corrosive media (water and cassava water) with the effect of local coolants (palm oil, coconut oil, groundnut oil, water and air) on the weldments has been studied. The results showed the trend of corrosion rates of mild steel in weldments in water and cassava water. Though, weight loss of specimens was constant in the corrosive media, this was due to the fact that weight loss increases with increase in immersion time, and corrosion rate does not follow the same trend due to concentration of stagnant ions blocking the creation of more ions and thus reducing Fe 2+ activities in the media. Specimen cooled by air has the least corrosion rate in table water (0.31mm/yr), then cassava water (0.46mm/yr). Air cooling causes downtime in production and it is not recommended. The corrosion rate of specimen cooled by water is highest out of all four selected media; cassava water (2.00mm/yr), table water (1.08mm/yr), hence, water-quenching is not recommended in table water and cassava water. Groundnut oil-quenched specimen had relatively higher corrosion rate in table water (0.92mm/yr) and cassava water (1.07mm/yr); it is not recommended in table water and cassava water media. Palm oil-quenched specimen had the relatively least corrosion rate in table water and cassava water and can be recommended in water and cassava water media. Coconut oil-quenched specimen had the highest corrosion rate in table water and cassava water hence it cannot be recommended in any media.

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“…Their application depends on the metal, on the aqueous or solvent environment (ions, pH). Under acidic conditions amino acids are often used as effective inhibitors [1][2][3][4][5][6]. These molecules contain not only carboxylic groups but, additionally, free amino groups, too, that under acidic conditions are protonated.…”

Section: Introductionmentioning

confidence: 99%

N-Substituted amino acids as anticorrosion additives. Part III: N-Acyl amino acids

2016

Int. J. Corros. Scale Inhib.

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N-Acylated natural amino acids under neutral conditions were in the focus of corrosion experiments. The influence of the α-side chain in the amino acids as well as the alkyl/aryl part of the acyl moiety on the anticorrosion activity was determined by gravimetric test and visualized by atomic force microscopy. The pH-dependence of the inhibitive character allowed the evaluation of the acidic and alkaline conditions on the corrosion inhibition. The analysis of the efficiencies gave information about the importance of the hydrophobic chains either in the amino acid or in the acyl part and of the other functional groups (carboxyl, chloro substituent). On the basis of these numerous efficacy data one can predict in advance the anticorrosion activity of other acylated amino acids.

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Investigation of the effect of different amino‐acid derivatives on the inhibition of NST‐44 carbon steel corrosion in cassava fluid

Cited by 13 publications

References 1 publication

Evaluation and Analyses of Rhizophora mangle L. Leaf-Extract Corrosion-Mechanism on Reinforcing Steel in Concrete Immersed in Industrial/Microbial Simulating-Environment

Evaluation and Analyses of Rhizophora mangle L. Leaf-Extract Corrosion-Mechanism on Reinforcing Steel in Concrete Immersed in Industrial/Microbial Simulating-Environment

Effects of coolants on the welding zone of mild steel rods in corrosive media

N-Substituted amino acids as anticorrosion additives. Part III: N-Acyl amino acids

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