Inhibitory mechanism of mild steel corrosion in 2M sulphuric acid solution by methylene blue dye

Oguzie, Emeka E.; Onuoha, G.N.; Onuchukwu, A.I.

doi:10.1016/j.matchemphys.2004.09.004

Cited by 161 publications

(88 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These inhibitors have also found useful application in the formulation of primers and anti-corrosive coatings, but a major disadvantage is their toxicity and as such their use has come under severe criticism. Among the alternative corrosion inhibitors, organic substances containing polar functions with nitrogen, sulphur, and/or oxygen in the conjugated system have been reported to exhibit good inhibiting properties [1][2][3][4]. The inhibitive characteristics of such compounds derive from the adsorption ability of their molecules, with the polar group acting as the reaction centre for the adsorption process.…”

Section: Introductionmentioning

confidence: 99%

“…The resulting adsorbed film acts as a barrier that separates the metal from the corrodent and efficiency of inhibition depends on the mechanical, structural and chemical characteristics of the adsorption layers formed under particular conditions. Recent awareness of the corrosion inhibiting abilities of tannins, alkaloids, organic and amino acids as well as organic dyes [3][4][5][6][7][8] has resulted in sustained interest on the corrosion inhibiting properties of natural products of plant origin. Such investigation is of much importance because in addition to being environmentally friendly and ecologically acceptable, plant products are inexpensive, readily available and renewable sources of materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Corrosion Inhibitive Effect and Adsorption Behaviour of Hibiscus Sabdariffa Extract on Mild Steel in Acidic Media

Oguzie

2007

Port. Electrochim. Acta

122

View full text Add to dashboard Cite

The inhibiting action of the calyx extract of Hibiscus sabdariffa on mild steel corrosion in 2 M HCl and 1 M H 2 SO 4 solutions was assessed using a gasometric technique. The results demonstrate that Hibiscus sabdariffa extract suppressed the corrosion reaction in both acid media and inhibition efficiency increased with extract concentration with slightly higher values obtained in 1 M H 2 SO 4 . Synergistic effects increased the efficiency of the extract in the presence of halide additives. Adsorption characteristics of the extract were approximated by the Langmuir isotherm. The inhibition mechanisms, estimated from the temperature dependence of inhibition efficiency as well from kinetic and activation parameters show that the extract functioned via mixedinhibition mechanism. It is suggested that molecular as well as protonated organic species in the extract contribute to the observed inhibiting action.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibitive Effect and Adsorption Behaviour of Hibiscus Sabdariffa Extract on Mild Steel in Acidic Media

Oguzie

2007

Port. Electrochim. Acta

122

View full text Add to dashboard Cite

show abstract

“…Also, it is accepted that the first step during the adsorption of an organic drug on a metal surface usually involves replacement of one or more water molecules absorbed at the metal surface (41,42). The adsorption is influenced by the nature and charge of the metal, chemical structure of inhibitor and type of aggressive electrolyte.…”

Section: Mechanism Of Inhibitionmentioning

confidence: 99%

Studies on the inhibition of carbon steel corrosion in hydrochloric acid solution by expired Carvedilol drug

Fouda

Morsi

Mogy

2017

Green Chemistry Letters and Reviews

View full text Add to dashboard Cite

An expired pharmaceutical product, Carvedilol, was studied as save drug to prevent carbon steel (CS) corrosion in acidic environments by using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. The inhibition efficiency increased with increasing drug dose and decreased with increasing temperature, reaching a maximum value of 98.94% at 25°C and 1.6 × 10 −4 M. Polarization data showed that the drug is of a mixed type. The inhibition of CS corrosion by Carvedilol can be attributed to the adsorption ability of drug molecules onto the reactive sites of the metal surface. The adsorption process follows the Langmuir isotherm via physical adsorption. The surface morphologies of CS were examined by atomic force spectroscopy (AFM). The results obtained from different techniques are in good agreement.

show abstract

“…Organic compounds have long been known to inhibit the corrosion of mild steel in acidic media. Compounds previously studied as inhibitors include triazole derivatives [2][3][4][5] , bipyrazolic derivatives 6 , surfactants 7,8 , aromatic hydrazides 9 , organic dyes 10,11 , poly (4-vinylpyridine) 12 and thiosemicarbazide-type organic compounds 13,14 . These compounds can adsorb on to the mild steel surface and block active sites, thus decreasing the corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Inhibition of Mild Steel by 4-Allyl-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol

Orhan¹,

Ercan²,

Koparır³

et al. 2012

Chem Sci Trans

View full text Add to dashboard Cite

4-Allyl-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol has been synthesized and characterized by IR, 1 H NMR, 13 C NMR analysis. The corrosion protection of mild steel in a 0.1 M H 2 SO 4 solution by 4-allyl-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol was studied by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Results showed that 4-allyl-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol inhibited mild steel corrosion in a 0.1 M H 2 SO 4 solution and indicated that the inhibition efficiencies increased with the concentration of inhibitor. Changes in impedance parameters suggested the adsorption of 4-allyl-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol on the mild steel surface, leading to the formation of protective films.

show abstract

Inhibitory mechanism of mild steel corrosion in 2M sulphuric acid solution by methylene blue dye

Cited by 161 publications

References 18 publications

Corrosion Inhibitive Effect and Adsorption Behaviour of Hibiscus Sabdariffa Extract on Mild Steel in Acidic Media

Corrosion Inhibitive Effect and Adsorption Behaviour of Hibiscus Sabdariffa Extract on Mild Steel in Acidic Media

Studies on the inhibition of carbon steel corrosion in hydrochloric acid solution by expired Carvedilol drug

Corrosion Inhibition of Mild Steel by 4-Allyl-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol

Contact Info

Product

Resources

About