Silver Jubilee review 25 years of progress in electrochemical methods

Sykes, J. M.

doi:10.1179/000705990798269577

Cited by 116 publications

(18 citation statements)

References 73 publications

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“…Many studies in the literature (Lukovists et al, 1998(Lukovists et al, , 1997Reugamani et al, 1994;Arab and Abd El-Nabey, 1991;Chaterjee et al, 1991;Ueharaand and Aramaki, 1991;Sykes, 1990) reported that the primary action in the inhibition process is the adsorption of the inhibitor molecules via their functional group(s) onto the metal surface. Therefore, it was of a particular interest to investigate the phenomenon of adsorption of the pyrimidine containing compounds and determine the degree of surface coverage by the adsorbed inhibitor molecules.…”

Section: Corrosion Weight Loss Testsmentioning

confidence: 99%

Mechanism of inhibition of iron corrosion in hydrochloric acid by pyrimidine and series of its derivatives

Awad¹,

Gawad

2005

Anti-Corrosion Meth & Material

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PurposeTo investigate the capability of a series of nitrogen‐based heterocyclic organic compounds in inhibiting corrosion of iron in HCl and elucidate the dominant active form of the applied compounds during the adsorption process to explore the mechanism of their action.Design/methodology/approachThe tested compounds were pyrimidine containing compounds, which were selected, based on molecular structure considerations. Gravimetric method has been applied with various electrochemical techniques (polarisation resistance, polarisation curves and electrochemical impedance spectroscopy) to investigate inhibition efficiency and mechanism.FindingsThe inhibiting action of the investigated pyrimidine containing compounds depends primarily on their concentration and molecular structure. These compounds act as mixed type inhibitors and function via adsorption on the surface, which follows Frumkin adsorption isotherm. The inhibition by the tested pyrimidine derivatives could be attributed to their chemisorption on the metal surface forming donor/acceptor type of bond between the inhibitor molecules and the vacant d orbitals of the surface iron atoms. Contribution from electrostatic adsorption, via interaction between the protonated form of the inhibitor and the charged metal surface, is also possible.Research limitations/implicationsThe applied inhibitors were tested in the presence of chloride ions as a corrosive medium. Whether these inhibitors will function well in the presence of other ions that are typically present in natural corrosive environment is unknown.Originality/valueThis paper provides useful information regarding inhibition effect of pyrimidine and series of its derivatives. The outcome of this work contributes to better understanding of the mechanism of inhibition by this class of N‐based heterocyclic organic compounds.

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Section: Corrosion Weight Loss Testsmentioning

confidence: 99%

Mechanism of inhibition of iron corrosion in hydrochloric acid by pyrimidine and series of its derivatives

Awad¹,

Gawad

2005

Anti-Corrosion Meth & Material

View full text Add to dashboard Cite

show abstract

“…as well as multiple bonds in their molecular structure, are assumed to be active centers of adsorption [5]. Many azine compounds like diazines, triazines and tetrazines were already reported as corrosion inhibitors so far [2,[6][7][8][9][10][11][12][13][14][15][16][17][18][19] and all these are traditionally identified, either by fiddling with existing inhibitors or by testing hundreds of compounds in a laboratory, which is a laborious, expensive and time-consuming process. The objective of this work is to design a novel corrosion inhibitor by the 'Structure Based Molecular Design' in less time by In-silico approach, which is a dry-lab process and its experimental investigation.…”

Section: Introductionmentioning

confidence: 99%

Part 1: In-silico studies as corrosion inhibitor and its experimental investigation on mild steel in wet-lab

Satyanarayana

Himabindu

Kalpana

et al. 2009

Journal of Molecular Structure: THEOCHEM

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“…To prevent unexpected metal dissolution and excess acid consumption in the process of acid cleaning, inhibitors will be put into use inevitably [1] . Many researchers have devoted themselves to researching the inorganic and organic inhibitors, however, the biological toxicity of inhibitors, especially some inorganic salts such as chromate [2] and some organic compounds such as organic phosphate [3] are documented because of environmental harmful characteristics [4,5] in recent years.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical, quantum chemical and SEM investigation of the inhibiting effect and mechanism of ciprofloxacin, norfloxacin and ofloxacin on the corrosion for mild steel in hydrochloric acid

Pang

Guo

et al. 2008

Sci. China Ser. B-Chem.

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The inhibiting effect and mechanism of 1-cyclopropyl-6-fluoro-1,4-dihydro -4-oxo-7-(1-piperazinyl) -3-quinoline carboxylicacid(ciprofloxacin), 1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinoline carboxylic acid (norfloxacin) and (−)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7 H-pyrido(1,2,3-de)-1,4-benzoxazine-6 carboxylic acid (ofloxacin) on the corrosion of mild steel in 1 mol/L HCl have been studied using electrochemical method, quantum chemical method and SEM at 303 K. The potentiodynamic results showed that these compounds suppressed both cathodic and anodic processes of mild steel corrosion in 1 mol/L HCl. The impedance spectroscopy showed that R p values increased, and C dl values decreased with the rising of the working concentration. Quantum chemical calculation showed that there was a positive correlation between some inhibitors structure properties and the inhibitory efficiency. The inhibitors function through adsorption followed Langmuir isotherm, and chemisorption made more contribution to the adsorption of the inhibitors on the steel surface compared with physical adsorption. SEM analysis suggested that the metal had been protected from aggressive corrosion because of the addition of the inhibitors.inhibition, mild steel, polarization, electrochemical impedance spectroscopy, SEM

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Silver Jubilee review 25 years of progress in electrochemical methods

Cited by 116 publications

References 73 publications

Mechanism of inhibition of iron corrosion in hydrochloric acid by pyrimidine and series of its derivatives

Mechanism of inhibition of iron corrosion in hydrochloric acid by pyrimidine and series of its derivatives

Part 1: In-silico studies as corrosion inhibitor and its experimental investigation on mild steel in wet-lab

Electrochemical, quantum chemical and SEM investigation of the inhibiting effect and mechanism of ciprofloxacin, norfloxacin and ofloxacin on the corrosion for mild steel in hydrochloric acid

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