Adsorption and passivation of copper by triazoles in neutral aqueous solution

Kuznetsov, Yuri A.; Agafonkina, M. O.; Shikhaliev, H. S.; Andreeva, N. P.; Yu, Ai Bing; Frumḳin, A.; Federation, Russian

doi:10.17675/2305-6894-2014-3-2-137-148

Cited by 15 publications

(24 citation statements)

References 10 publications

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“…It is known that, in addition to adsorption interaction with the metal, many CIs of complexation type are capable of forming multilayer films comprising a polymeric compound formed by cations of the metal being protected [4,[8][9][10][11][12]. These CIs often include azoles, for example aminotriazoles [9,13,14].…”

Section: Adsorption Of Corrosion Inhibitors On Metals and Passivationmentioning

confidence: 99%

Progress in the science of corrosion inhibitors

Kuznetsov

pr.²,

Moscow³

et al. 2015

Int. J. Corros. Scale Inhib.

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The physicochemical features of corrosion inhibition of metals (alloys) strongly depend on the composition of the corrosive environment, its pH, temperature t, hydrodynamic conditions, the chemical nature of the metal to be protected, and the state of its surface, the presence of oxides, dirt, or corrosion products on it. This "multifactor" nature of corrosion seriously complicates the theoretical choice of an efficient corrosion inhibitor (CI), often requiring careful experimental studies and creating unjustified skepticism about the fundamental character of the physical chemistry area related to the study and development of CIs. Meanwhile, this skepticism can be proved wrong by the progress made over the past quarter century in various subareas. Key words: corrosion inhibitors, adsorption, metal passivation, volatile corrosion inhibitors, migrating inhibitors, local depassivation of metals, protecting coatings. Adsorption of corrosion inhibitors on metals and passivationAdsorption on a protected surface is the first event that often determines CI efficiency. Difficulties of its measurement in situ are caused by dissolution and/or oxidation of the metal substrate with time. The uncertainty in separating the effects of adsorption and changes of the state of the metal surface often does not permit to unambiguously interpret the results obtained, for example, by electrochemical impedance spectroscopy (EIS) or using radioactive tracers. In his first "Inhibitors of corrosion of metals in neutral media" (1953), I.L. Rozenfel'd considered only inorganic CIs. He remained interested in these inhibitors throughout his whole life, so it is not surprising that in his latest book "Corrosion Inhibitors" (1977) he reexamined the interaction of some inorganic CIs, primarily chromate, with the metal at a more modern level, including a quantum-chemical approach. However, studies on the

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Section: Adsorption Of Corrosion Inhibitors On Metals and Passivationmentioning

confidence: 99%

Progress in the science of corrosion inhibitors

Kuznetsov

pr.²,

Moscow³

et al. 2015

Int. J. Corros. Scale Inhib.

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“…Behavior of copper and zinc in a neutral medium was previously studied in the presence of 5-mercaptopentyl-3-amino-1,2,4-triazole (MPATA) (Figure 1), and its high efficiency was shown [40][41][42][43]. We believed that it would be interesting to study adsorption and protective ability of MPATA for brass in a neutral borate buffer solution (pH 7.4) with and without NaCl.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of Brass (80/20) by 5-Mercaptopentyl-3-Amino-1,2,4-Triazole in Neutral Solutions

Arkhipushkin

Shikhaliev

Potapov

et al. 2017

Metals

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Abstract:The effect of the adsorption of 5-mercaptopentyl-3-amino-1,2,4-triazole (MPATA) on the corrosive behavior of brass (Cu80/Zn20) in neutral (pH 7.4) borate buffer solutions with and without 0.01 M NaCl was studied. Electrochemical methods show significant decrease of the anodic and cathodic currents on the polarization curves in the presence of MPATA. X-ray photoelectron spectroscopy (XPS) reveals MPATA adsorption on the brass surface from an inhibitor solution. After 17 h of exposure, a mixed complex [Cu x Zn y MPATA z ] with a thickness of about 3-3.5 nm is formed on the surface. This nanolayer has sufficient protective ability to withstand corrosion tests in a salt fog chamber: after 5 days of testing, the samples remain glossy and less than 1% of the surface has been damaged. After corrosion tests in a salt fog chamber, the surface of unprotected samples is enriched with zinc, while at the surface of inhibitor-treated samples, the copper and zinc are present in practically equal contents.

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“…Copper can only be passivated by forming an oxide surface layer in weak acid or alkaline solutions. The behavior of copper and its alloys in acidic media is extensively investigated and several schemes have been presented for the dissolution process [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Heterocyclic compound such as thiazole [21], benzotriazole [5,[22][23], tetrazole [24], triazole [2,25], imidazole [26] and their derivatives, are among the inhibitors investigated for applications to prevent the corrosion of copper and its alloys in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Piezogravimetric investigation of heterocyclic compounds as potential inhibitors against copper corrosion in acidic media

Shaban¹,

Gy.²,

Nyikos³

2015

Int. J. Corros. Scale Inhib.

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Corrosion and inhibition processes can be followed by different in-situ methods at a nanometer scale. In this contribution, the corrosion breakdown potentials and inhibition efficiencies were evaluated using the electrochemical quartz crystal nanobalance (EQCN) technique, by recording linear potential scan for voltammetric (i -E) and piezogravimetric (m -E) characteristics. The effectiveness of thiazole derivatives, in an aggressive solution of 0.1 M Na 2 SO 4 , on the value of the breakdown potential of the copper electrode, was investigated. The investigated thiazole derivatives are: 5-benzylidene-2,4-dioxo tetrahydro-1,3-thiazole (5-BDT) 5-(4´-isopropylbenzylidene)-2,4-dioxotetrahydro-1,3-thiazole (5-IPBDT), 5-(3´-thenylidene)-2,4-dioxotetrahydro-1,3-thiazole (5-TDT) and 5-(3´,4´-dimetoxybenzylidene)-2,4-dioxotetrahydro-1,3-thiazole (5-MBDT). The inhibitor effectiveness was monitored and corrosion rates were determined. Previously found effects for some of the thiazole derivatives were confirmed. The most effective, among the tested thiazole derivatives against copper corrosion, was 5-IPBDT, due to the presence of the isopropyl functional group.

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Adsorption and passivation of copper by triazoles in neutral aqueous solution

Cited by 15 publications

References 10 publications

Progress in the science of corrosion inhibitors

Progress in the science of corrosion inhibitors

Inhibition of Brass (80/20) by 5-Mercaptopentyl-3-Amino-1,2,4-Triazole in Neutral Solutions

Piezogravimetric investigation of heterocyclic compounds as potential inhibitors against copper corrosion in acidic media

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