Effect of cyanine dye-solvent interaction on the electrochemical corrosion behaviour of low-carbon steel in acid medium

Makhlouf, M.Th.; Gomma, G. K.; Wahdan, Mostafa H.; Khalil, Z. H.

doi:10.1016/0254-0584(94)01467-u

Cited by 24 publications

(9 citation statements)

References 13 publications

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“…Dyes have been used to give multicolor effects to anodized aluminum. − Cyanine dyes have been reported as efficient corrosion inhibitors on metal corrodent systems . Green S and erythrosine dyes have been studied as potential inhibitors for mild steel corrosion in HCl .…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical and Quantum Chemical Investigation of Some Azine and Thiazine Dyes as Potential Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution

Ebenso

Kabanda

Murulana

et al. 2012

Ind. Eng. Chem. Res.

143

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The inhibition performances of some selected azine and thiazine dyes, namely, Neutral Red (NR), Azure A Eosinate (AAE), Toluidine Blue (TB), phenosafranin (PS), and Rhodanile Blue (RB), on mild steel corrosion in hydrochloric acid solution was studied the using electrochemical impedance spectroscopy (EIS) and Tafel polarization techniques. Quantum chemical calculations based on the density functional theory (DFT) and semiempirical (PM3) methods were used to investigate the reactivities and selectivities of the studied cationic dyes. The effects of inhibitor concentration on the inhibition efficiency have been studied. Inhibition efficiency increased with increase in concentration of all the studied cationic dyes within the concentration range 100−500 ppm. Potentiodynamic studies revealed that all the inhibitors are of mixed type. The results obtained from the EIS studies showed good agreement with the results from potentiodynamic polarization techniques. The quantitative structure−activity relationship (QSAR) approach was also used to correlate the quantum chemical parameters with the experimentally determined inhibition efficiencies. The results show that thiazine dyes are better corrosion inhibitors than azine dyes; however, when azines contain more electron donor centers than thiazines, they are preferred as corrosion inhibitors to thiazine. Hydrogen bonding could be one of the possible physisorption mechanisms for the adsorption of the selected dyes onto the metal surface because of the many hydrogen bond donor centers in the studied compounds. QSAR results show good correlations between a number of quantum chemical parameters and the determined inhibition efficiency.

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Section: Introductionmentioning

confidence: 99%

“…27−32 Cyanine dyes have been reported as efficient corrosion inhibitors on metal corrodent systems. 33 Green S and erythrosine dyes have been studied as potential inhibitors for mild steel corrosion in HCl. 34 A survey of the literature also reveals that the corrosion on aluminum in amine solutions by some dyes has been reported.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Quantum Chemical Investigation of Some Azine and Thiazine Dyes as Potential Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution

Ebenso

Kabanda

Murulana

et al. 2012

Ind. Eng. Chem. Res.

143

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“…Generally, the mechanism by which a given inhibitor may attach to metal depends on the functional group present in its molecule. Some functional groups are normally held more firmly than others [28]. According to Fragnani and Trabanelli [29], sulfur-containing substances easily chemisorb onto the surface of metal in acid media, whereas nitrogen-containing compounds tend to favor physisorption.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical and dissolution behavior of the Ti-alloy VT-9 in H2SO4 solution in the presence of the organic inhibitor (2-phenyl-4-[(E)-1-(4-solphanylanilino)methylyden]-1,3-oxazole-5(4H)-one

Hosseini¹,

Amiri²

2007

JICS

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This investigation potentiodynamically evaluates the corrosion behavior of a high strength titanium alloy, VT-9, in 4 M sulfuric acid solution containing different concentrations (10, 20, 30 ppm) of the organic inhibitor, 2-phenyl-4-[(E)-1-(4-sulfanylanilino)methylidene]-1,3-oxazole-5(4H)-one (L-SH), at different temperatures (293, 303 and 313 ± 1 K). The open circuit potential values noted before and after each experiment varied appreciably with time. These values, in the presence of L-SH, were negative before polarization, but after completion of the experiment turned positive and remained stable over a long period of time. The cathodic current density values increased with increasing cathodic potential (more negative). The corrosion potential (E corr ) increased remarkably with the addition of L-SH. The corrosion current densities (I corr ), critical current density (I cr ), and passive current density (I p ) all decreased when L-SH was used. However, only the decrease in the I corr with increasing amounts of inhibitor was significant compared to that of I cr and I p . L-SH expanded the range of the passive potential. SEM micrographs and open circuit potential measurements revealed the formation of a uniform and protective film on the alloy surface in the presence of L-SH, which acted as an efficient inhibitor.

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“…According to Onuchukwu and Adamu (1996) and Onuchukwu and Njemanze (1997), metals that are unable to adsorb these dyes are corroded by them. Indeed, some azo dyes (Talati and Joshi, 1980; Madkour et al , 1999; Ebenso, 2003) and cyanine dyes (Maklouf et al , 1995; Ekpe et al , 1995) have been reported as effective inhibitors of metal corrosion. The dye molecules bond to the metal surface by chemisorption, physisorption, or complexation (Lukovits et al , 2001).…”

Section: Introductionmentioning

confidence: 99%

The inhibition of aluminium corrosion in potassium hydroxide by “Congo Red” dye, and synergistic action with halide ions

Oguzie

Onuoha

Onuchukwu

2005

Anti-Corrosion Methods and Materials

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PurposeTo investigate the inhibitive effect of Congo red dye (CR) for aluminium corrosion in strong alkaline solutions and evaluate the synergistic effect of halide ions on the inhibition efficiency.Design/methodology/approachCorrosion rates of aluminium test coupons were determined by gravimetric technique at 30 and 60°C. Inhibition efficiencies of the additives (0.01‐5.0 mM CR and 5.0 mM CR+0.5 mM halides) were evaluated by comparing corrosion rates of the test coupons in 2 M KOH solution in the absence and presence of the additives.FindingsCR inhibited aluminium corrosion in 2 M KOH by physical adsorption of the dye molecules on the corroding metal surface. Maximum efficiency at 30 and 60°C was 31.72 and 19.32 per cent, respectively. Dye adsorption was enhanced in the presence of halides in the order KCl < KBr < KI, with KI increasing efficiency up to 48.63 and 41.70 per cent at 30 and 60°C, respectively.Research limitations/implicationsFurther studies to involve variation of dye and halide concentrations for CR+halide systems to determine the best combination for optimum inhibition synergism.Originality/valueThis paper forms part of an extensive database on the inhibition characteristics of organic dyes for corrosion of different metals in various aggressive environments. This is to serve as a guide to possible applications in metal‐surface anodizing and as additives in surface coatings for service in different environments.

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Effect of cyanine dye-solvent interaction on the electrochemical corrosion behaviour of low-carbon steel in acid medium

Cited by 24 publications

References 13 publications

Electrochemical and Quantum Chemical Investigation of Some Azine and Thiazine Dyes as Potential Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution

Electrochemical and Quantum Chemical Investigation of Some Azine and Thiazine Dyes as Potential Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution

Electrochemical and dissolution behavior of the Ti-alloy VT-9 in H2SO4 solution in the presence of the organic inhibitor (2-phenyl-4-[(E)-1-(4-solphanylanilino)methylyden]-1,3-oxazole-5(4H)-one

The inhibition of aluminium corrosion in potassium hydroxide by “Congo Red” dye, and synergistic action with halide ions

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