Corrosion Inhibition of Carbon Steel in HCl Solutions Using Aminopyrimidine Derivatives

Mahmoud, S. S.; Ahmed, M. M.

doi:10.4152/pea.200601037

Cited by 16 publications

(12 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This means that the inhibitory effect of the organic molecules will depend on Clconcentration, which decreases as the inhibitor capacity to form a protection layer on the metal surface increases. 15 E corr is almost steady. Regarding the curve without inhibitor, Tafel slopes change positively and negatively for the anodic and cathodic processes, respectively, that is, the inhibitor influences the two processes and behaves in a mixed fashion.…”

Section: Polarization Curvesmentioning

confidence: 88%

“…Working system. Fifty mL of 3.5% NaCl electrolyte, with and without inhibitor, are introduced into the electrochemical cell and kept at constant temperature (15,20,25,30,35 and 40 ± 0.5ºC ); the working electrode was kept inside the cell for 60 min. Then the auxiliary electrode was introduced into the cell, facing (at the same height) the working electrode at 2-3 mm apart.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

5-AMINO-1,3,4-THIADIAZOLE-2-THIOL CORROSION CURRENT DENSITY AND ADSORPTION THERMODYNAMICS ON ASTM A-890-1B STAINLESS STEEL IN A 3.5% NaC1 SOLUTION

Guzmán

Lara

Vera

2009

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

Using the electrochemical linear polarization resistance technique, 5-amino-1,3,4-thiadiazole-2-thiol corrosion current density on ASTM A-890-1B steel is determined in a 3.5% NaCl solution at different temperatures. The corrosion inhibition process is mixed. Apparent activation energy is calculated, being the one with inhibitor slightly greater than that without it. Adsorption matches Damaskin-Parsons isotherm, showing that molecules adsorbed by the metal surface reject each other. Three water molecules on the metal surface are replaced by one inhibitor molecule. This is demonstrated by calculating the surface these molecules project. Normal thermodynamic adsorption parameters are calculated, showing that the process is spontaneous and exothermic. Inhibitor adsorption on the metal surface is a chemical adsorption.

show abstract

Section: Polarization Curvesmentioning

confidence: 88%

Section: Methodsmentioning

confidence: 99%

5-AMINO-1,3,4-THIADIAZOLE-2-THIOL CORROSION CURRENT DENSITY AND ADSORPTION THERMODYNAMICS ON ASTM A-890-1B STAINLESS STEEL IN A 3.5% NaC1 SOLUTION

Guzmán

Lara

Vera

2009

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Como exemplo de inibidores não-iônicos, derivados da tioureia, tiadiazolina e aminopirimidina, que possuem eficiência de inibição à corrosão atribuída à existência de heteroátomos (enxofre, nitrogênio e oxigênio) e elétrons-pi () em conjugação. [9][10][11][12] Os métodos mais utilizados para combater processos corrosivos podem ser resumidos na utilização de elementos químicos de liga que promovem passivação metálica; recobrimento da superfície metálica com resina polimérica; oxidação de compostos inorgânicos; utilização de substâncias orgânicas que, por quimissorção ou fisissorção, geram filmes protetores. Neste contexto, o uso de tensoativos como inibidores de corrosão, encontra-se bem documentado.…”

Section: Introductionunclassified

Sorbitans as Corrosion Inhibitors

Rodrigues¹,

Maciel²,

Lima³

2013

Revista Virtual De Química

View full text Add to dashboard Cite

Sorbitans as Corrosion InhibitorsAbstract: In the general industrial sector corrosion damage causes irreversible financial losses.As an example, in the petroleum refining industrialization process, in which electrochemical corrosive attack were correlated to several corrosive processes. Inhibitors are used in industrial scale and represent an alternative procedure to mitigate material deterioration. In this context, non ionic surfactants form a protective layer on the metal providing resistance against electrochemical damage. Sorbitan-type surfactant (Tween class) is a non-ionic corrosion inhibitor agent that have been extensively evaluated showing satisfactory results. In this present paper, the applicability and effectiveness of some sorbitans as corrosion inhibitors represent the subject of a literary review aiming the analyses of its results correlate to metallic material, temperature and corrosive media variances. In that, the applied technique, chemical structure of the surfactant and its concentrations, are herein discussed.Keywords: Corrosion inhibitor; sorbitan surfactant-type; literary review. ResumoNo setor industrial a corrosão gera prejuízos financeiros irreversíveis. Citando apenas um exemplo, a industrialização de produtos provenientes do refino do petróleo causa danos nos sistemas de dutos provenientes do desencadeamento de processos corrosivos, que se formam em função de meios eletroquímicos. A deterioração de materiais metálicos vem sendo combatida de formas variadas, o uso de inibidores de corrosão representa uma das possibilidades. Neste contexto, os tensoativos não-iônicos se destacam por formarem uma camada protetora resistente ao ataque eletroquímico. Os tensoativos do tipo sorbitanos (classe dos Tweens) são inibidores não-iônicos com eficácia comprovada, tendo sido alvo de revisão literária com destaque para suas eficácias na inibição à corrosão de materiais metálicos. Para tanto, foram apresentados resultados em função de análises das técnicas utilizadas, variações de temperatura e meio corrosivo, bem como estrutura química do tensoativo e suas concentrações.Palavras-chave: Inibidores de corrosão; tensoativos do tipo sorbitanos; revisão literária.

show abstract

“…Because of the general aggressively of acid solutions, inhibitors are commonly used to reduce the corrosive attack on metallic materials. Most of the efficient inhibitors used in industry are organic compounds containing nitrogen, sulphur, oxygen atoms and multiple bonds in the molecule through which they are adsorbed on the metal surface [1][2][3][4][5][6][7][8][9][10]. The aim of this work is to study the effect of some derivatives of phenyl phthalimide as corrosion inhibitors for dissolution of carbon steel in 0.5 M H 2 SO 4 solutions using weight loss and galvanostatic polarization measurements.…”

Section: Introductionmentioning

confidence: 99%

Phenyl Phthalimide as Corrosion Inhibitor for Corrosion of C-Steel in Sulphuric Acid Solution

Zaafarany

2009

Port. Electrochim. Acta

View full text Add to dashboard Cite

The effect of some phenyl phthalimide derivatives on the corrosion of carbon steel in 0.5 M H 2 SO 4 solution was studied using weight loss and galvanostatic polarization techniques. The percentage inhibition efficiency was found to increase with increasing concentration of inhibitor and with decreasing temperature. Inhibition was explained by adsorption of these compounds on the metal surface. The adsorption follows Freundlich adsorption isotherms. Some thermodynamic functions were computed and discussed.

show abstract

Corrosion Inhibition of Carbon Steel in HCl Solutions Using Aminopyrimidine Derivatives

Cited by 16 publications

References 0 publications

5-AMINO-1,3,4-THIADIAZOLE-2-THIOL CORROSION CURRENT DENSITY AND ADSORPTION THERMODYNAMICS ON ASTM A-890-1B STAINLESS STEEL IN A 3.5% NaC1 SOLUTION

5-AMINO-1,3,4-THIADIAZOLE-2-THIOL CORROSION CURRENT DENSITY AND ADSORPTION THERMODYNAMICS ON ASTM A-890-1B STAINLESS STEEL IN A 3.5% NaC1 SOLUTION

Sorbitans as Corrosion Inhibitors

Phenyl Phthalimide as Corrosion Inhibitor for Corrosion of C-Steel in Sulphuric Acid Solution

Contact Info

Product

Resources

About