Corrosion Inhibition of Mild Steel in 1 M H2SO4 by Polyvinyl Pyrrolidone and Synergistic Iodide Additives

Umoren, Savıour A.; Eduok, Ubong; Oguzie, Emeka E.

doi:10.4152/pea.200806533

Cited by 68 publications

(39 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also reported is the synergistic influence of poly (4-vinyl pyridine) and potassium iodide on the inhibition of corrosion of mild steel in HCl [19]. A series of reports from our laboratory has also highlighted the synergistic effect of iodide ion on the corrosion inhibition of metals by polyacrylamide [20], polyvinyl pyrrolidone [21,22], 2, 3-diaamionaphthalene [23] and alizarine yellow GG dye [24]. However, most of these investigations were carried out in acidic environment.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Influence of Gum Arabic and Iodide Ion on the Corrosion Inhibition of Aluminium in Alkaline Medium

Umoren

2009

Port. Electrochim. Acta

Self Cite

View full text Add to dashboard Cite

The effect of iodide ion on the corrosion inhibition of aluminium in NaOH in the presence of Gum Arabic (GA) was studied using weight loss and hydrogen evolution techniques at 303 and 313 K. The results obtained showed that inhibition efficiency increased with increasing GA concentration. The inhibiting action of GA was considerably enhanced by the addition of KI. The adsorption of KI, GA alone and in combination with iodide ion was found to obey Temkin adsorption isotherm. The inhibiting effect of GA and (GA+KI) increased with increase in temperature of the corrosion medium, indicating chemical adsorption mechanism. Synergism parameter evaluated was found to be greater than unity for the different concentrations of GA, which shows that the enhanced inhibition of GA caused by the addition of iodide ion is due to synergistic effect. It could be deduced from the thermodynamic parameters obtained that adsorption of GA alone and in combination with KI onto the metal surface is spontaneous.

show abstract

Section: Introductionmentioning

confidence: 99%

Synergistic Influence of Gum Arabic and Iodide Ion on the Corrosion Inhibition of Aluminium in Alkaline Medium

Umoren

2009

Port. Electrochim. Acta

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Intoductionmentioning

confidence: 99%

“…Corrosion protection of steel in acidic media is of great importance for both industrial facilities and theoretical aspects [5]. The adsorption of these molecules depends mainly on certain physicochemical properties of the inhibitor molecule such as the presence of heteroatoms including: oxygen, sulfur, nitrogen atoms and multiple bonds in the molecule through which they are adsorbed on the metal surface [6][7][8][9][10].Heteroatoms such as nitrogen, oxygen, and sulfur are capable of forming coordinate covalent bond with metal owing to their free electron pairs and thus acting as inhibitor. Compounds with π bonds generally exhibit good inhibitive properties due to the interaction of π orbital with metal surface [11][12][13].…”

mentioning

confidence: 99%

Biocidal activity and corrosion inhibition of some cationic surfactants derived from Thiol polyurethane.

Zaky

Sabbah²,

Negm

et al. 2017

Egypt. J. Chem.

View full text Add to dashboard Cite

SIX series of cationic polyurethane surfactants were synthesized by the reaction between different six esters (which prepared by condensation of fatty alcohols namely: octanol, decanol, dodecanol, tetradecanol, hexadecanol and octadecanol with bromoacetic acid) and polyurethane as quaternizing agent. The chemical structures of these surfactants were confirmed using elemental analysis, FTIR spectra, + HNMR and UV analysis. The surface activities of the synthesized cationic thiol polyurethane surfactants showed their tendency towards adsorption at the air/water interface. The adsorption tendency was estimated from the values of surface tension and the depression of surface tension at the critical micelle concentration. The studied surfactants were evaluated as antimicrobial agents against pathogenic and sulfur reducing bacteria using inhibition zone diameters and minimum inhibition concentration values. The synthesized cationic thiol polyurethane surfactants showed good antimicrobial activities against the tested microorganisms including Gram positive, Gram negative as well as fungi. The synthesized compounds were tested for the activity as corrosion inhibitors against carbon steel corrosion in 2N H 2 SO 4 at 50, 100, 200, 400 and 600 ppm. The inhibition efficiencies of the tested compounds showed good inhibition and protection of the carbon steel. The corrosion inhibition tendency correlated to the surface activity and chemical structure of the compounds.Keywords: Cationic surfactants, Surface activity, Adsorption , Antimicrobial activity, Corrosion inhibition, Polyurethane. IntoductionCorrosion inhibitors are added to prevent metal dissolution during its surface cleaning from oxides and other adherent materials [1]. Also, corrosion inhibitors may be liquids or powder form that effectively reduces the corrosion rate by adsorbing on the metal surface [2,3]. Corrosion inhibition efficiency of organic compounds is related to their adsorption properties [4]. Corrosion protection of steel in acidic media is of great importance for both industrial facilities and theoretical aspects [5]. The adsorption of these molecules depends mainly on certain physicochemical properties of the inhibitor molecule such as the presence of heteroatoms including: oxygen, sulfur, nitrogen atoms and multiple bonds in the molecule through which they are adsorbed on the metal surface [6][7][8][9][10].Heteroatoms such as nitrogen, oxygen, and sulfur are capable of forming coordinate covalent bond with metal owing to their free electron pairs and thus acting as inhibitor. Compounds with π bonds generally exhibit good inhibitive properties due to the interaction of π orbital with metal surface [11][12][13]. The selection of a suitable inhibitor for a particular system is a difficult task because of the selectivity of the inhibitors and wide variety of corrosive environment. As a result, several types of corrosion inhibitors were developed to fit the different types of corrosion processes and also the medium where the corrosion takes place. Cor...

show abstract

“…The most fit isotherm model for CPFASC and NPFASC on CS in 1 M HCl was Freundlich and El-Awady isotherm (Eqs. 5, 6) [22][23][24], where h is fractional surface coverage, K ads is the adsorption equilibrium constant and C is the concentration of the inhibitor. In El-Awady isotherm,…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Chemical modification at the surface and corrosion inhibition response of two semicarbazones on carbon steel in HCl medium

Palayoor¹,

Kakkassery

Kanimangalath³

et al. 2016

Int J Ind Chem

View full text Add to dashboard Cite

Two similarly structured heterocyclic semicarbazones (E)-4-(5-((2-carbamoylhydrazano)methyl)furan-2-yl)benzoic acid (CPFASC) and (E)-2-((5-(4-nitrophenyl)-furan-2-yl)methylene)hydrazinecarboxamide (NPFASC) were synthesized, characterized and tested for their corrosion protection capacity on carbon steel (CS) in 1 M HCl solution. Contrary to expectation the non-planar molecule NPFASC showed better inhibition efficiency on CS surface than CPFASC. At a concentration of 0.5 mM, NPFASC displayed 93.4 % while CPFASC showed 89.9 % inhibition efficiency according to impedance studies. This unusual behavior can be explained by the conversion of the nitro group present in the NPFASC molecule into amino group on approaching the metal surface in the corrosive medium. This transformation obviously changes the geometry of the molecule which is more conducive for corrosion inhibition. Analysis of the corrosion product deposited on the surface of the metal revealed the mechanism behind the inhibitive power of molecules. Adsorption studies showed that CPFASC and NPFASC follow Freundlich and El-Awady isotherms, respectively, on the carbon steel surface. Adsorption equilibrium constant and free energy of adsorption were also evaluated. The corrosion investigations were done by gravimetric, EIS and polarization studies and the surface analysis of the metal specimens was performed by SEM, AFM and IR spectral spectroscopy.

show abstract

Corrosion Inhibition of Mild Steel in 1 M H2SO4 by Polyvinyl Pyrrolidone and Synergistic Iodide Additives

Cited by 68 publications

References 31 publications

Synergistic Influence of Gum Arabic and Iodide Ion on the Corrosion Inhibition of Aluminium in Alkaline Medium

Synergistic Influence of Gum Arabic and Iodide Ion on the Corrosion Inhibition of Aluminium in Alkaline Medium

Biocidal activity and corrosion inhibition of some cationic surfactants derived from Thiol polyurethane.

Chemical modification at the surface and corrosion inhibition response of two semicarbazones on carbon steel in HCl medium

Contact Info

Product

Resources

About