Corrosion of Metals in Organic Solvents

Heitz, Ewald

doi:10.1007/978-1-4615-9059-0_3

Cited by 74 publications

(25 citation statements)

References 85 publications

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“…Los mecanismos de corrosión asociados a líquidos orgánicos son más complejos y menos conocidos que los que se producen en disoluciones acuosas. Los alcoholes, aunque son disolventes próticos como el agua, presentan diferentes propiedades físico-químicas [22] . En la tabla II Tabla i. Composición química y propiedades físicas del etanol según la normativa vigente se presentan distintas propiedades físico-químicas del agua y diferentes líquidos orgánicos: metanol, etanol, ácido fórmico y ácido acético.…”

Section: Revisión De Los Estudios De La Corrosión En Aleaciones Produunclassified

Revisión y estado del arte de la corrosividad del etanol y sus mezclas con gasolina

Berlanga¹,

Biezma²,

Fernández³

2011

REVMETAL

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resumenActualmente, el etanol se presenta como una fuente importante de combustible renovable para el sector de la automoción. Se sabe que los carburantes tradicionales, como la gasolina, no han causado problemas de corrosión, debido principalmente a su baja miscibilidad en el agua. En cambio, los biocarburantes en base alcohol pueden contener una considerable cantidad de agua y, además, se puede producir la oxidación parcial de sus componentes por su exposición a la atmósfera. Estas reacciones pueden ocasionar corrosión y posterior fallo, de cualquier componente metá-lico en contacto con las mezclas etanol-gasolina. En consecuencia, todos los sectores relacionados con la industria que emplean este combustible, empresas productoras, logística, dispensadores y fabricantes de vehículos, pueden estar afectados por esta problemática. Esto hace que este tema sea muy interesante, tanto desde un punto de vista científico como industrial. En este trabajo se revisa sistemáticamente todos los aspectos relacionados con la corrosión que produce el etanol y sus mezclas con gasolina, con el objetivo de conocer en profundidad el estado actual de las investigaciones, así como para orientar trabajos futuros que estén afectados, tanto de forma directa o indirecta con esta temática. Palabras claveEtanol; Corrosión electroquímica; Corrosión bajo tensión; Inhibidores. review and state-of-the-art of the corrosivity produced by ethanol and their mixtures with gasoline AbstractEthanol is currently an important source of renewable combustible for the automotive sector. It is known that traditional fuels such as gasoline have not caused corrosion problems due mainly to low miscibility with water. On the other hand, the alcohol based biofuels can contain a considerable amount of water, and in addition, partial oxidation of their components might be produced by exposition to the atmosphere, and this may lead to corrosion and subsequent failure of any metallic component in contact with the ethanol-gasoline blends. In consequence, all the industrial sectors related to this fuel, producing companies, logistics, dispensers and manufacturers of vehicles might be affected by this problem. This makes this topic very interesting, both from a scientific and an industrial point of view. This paper systematically reviews all aspects related to the corrosive behaviour of ethanol and ethanol-gasoline blends, with the aim of assessing the current state-of the-art as well as serving as a guide for further works that take the study of this subject matter.

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Section: Revisión De Los Estudios De La Corrosión En Aleaciones Produunclassified

Revisión y estado del arte de la corrosividad del etanol y sus mezclas con gasolina

Berlanga¹,

Biezma²,

Fernández³

2011

REVMETAL

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“…Formic acid is the most corrosive of the common organic acids. Corrosion inhibition studies on metals in organic acid solutions are scarce in comparison with similar studies in mineral acids [1][2][3][4]. Mild steel has many uses in industry, as in the fabrication of reaction vessels, storage tanks, etc.…”

Section: Introductionmentioning

confidence: 97%

Fatty acid oxadiazoles as corrosion inhibitors for mild steel in formic acid

Quraishi

Ansari

2005

J Appl Electrochem

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Selected oxadiazoles of fatty acids; namely 2-hepta decene-5-mercapto-1-oxa-3,4-diazole (HMOD); 2-undecane-5-mercapto-1-oxa-3,4-diazole (UMOD); and 2-decene-5-mercapto-1-oxa-3,4-diazole (DMOD), were synthesized. Their influence on the inhibition of corrosion of mild steel in 20% formic acid (HCOOH) was investigated by weight loss and potentiodynamic polarization techniques. The inhibition efficiency of the compounds was found to vary with concentration, immersion time and temperature. All the compounds showed good inhibition efficiency (e IE ) in formic acid solution. Adsorption on mild steel obeyed the Langmuir adsorption isotherm. Potentiodynamic polarization revealed that all three inhibitors, HMOD, UMOD, and DMOD are mixed inhibitors. Electrochemical impedance spectroscopy was also used to investigate the inhibition mechanism.

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“…The inhibitor molecules are physically or chemically adsorbed on the corroding metal surface forming a protective layer and isolating it from aggressive medium [3][4][5][6][7][8][9][10][11][12] . Limited numbers of references are available dealing with corrosion studies of metals in organic acids [13][14][15] . Organic acids, which constitute a group of important chemicals currently used in chemical industries, find use in preparation of chemicals, drugs, plastic and fibers.…”

Section: Introductionmentioning

confidence: 99%

Alkanediyl-α, ω-bis (dimethyl cetylammonium bromide) gemini surfactants as novel corrosion inhibitors for mild steel in formic acid

Mobin

Masroor

2012

Mat. Res.

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Gemini surfactants, butanediyl 1,4-bis(dimethyl cetylammonium bromide), pentanediyl 1,5 -bis (dimethyl cetylammonium bromide) and hexanediyl 1,6 -bis (dimethyl cetylammonium bromide) from Alkanediyl-α, ω-bis (dimethyl cetylammonium bromide) series were synthesized in laboratory and were characterized by using Nuclear Magnetic Resonance (NMR) spectroscopy. The surfactants were tested as corrosion inhibitors for mild steel in 20% formic acid. The influence of surfactants on mild steel corrosion inhibition was investigated by measuring the corrosion rate of mild steel in their absence and presence by weight loss measurements, solvent analysis of iron ions into the test solution and potentiodynamic polarization measurements. The surface morphology of the corroded steel samples in presence and absence of surfactants was evaluated by using Scanning Electron Microscopy (SEM). The synthesized gemini surfactants performed as excellent corrosion inhibitor, the inhibition efficiency (IE) being in the range of 76.66-97.41%. The IE of surfactants is slightly affected by the spacer length. The IE increased with increase in surfactant concentration and temperature. The adsorption of gemini surfactants on the steel surface was found to obey Langmuir adsorption isotherm. The results of the potentiodynamic polarization studies are consistent with the results of weight loss studies.

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Corrosion of Metals in Organic Solvents

Cited by 74 publications

References 85 publications

Revisión y estado del arte de la corrosividad del etanol y sus mezclas con gasolina

Revisión y estado del arte de la corrosividad del etanol y sus mezclas con gasolina

Fatty acid oxadiazoles as corrosion inhibitors for mild steel in formic acid

Alkanediyl-α, ω-bis (dimethyl cetylammonium bromide) gemini surfactants as novel corrosion inhibitors for mild steel in formic acid

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