The effects of water and chloride ions on the electrochemical behaviour of iron and 304l stainless steel in alcohols

Anna, P. L. De

doi:10.1016/0010-938x(85)90087-3

Cited by 60 publications

(14 citation statements)

References 8 publications

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“…This may be the effect of the joint action of different corrosion mechanisms, that is, the presence of water and contaminants, such as organic acids and aggressive ions dissolved in the medium. In addition to the dissolution by reaction with water and by the formation of alkoxides 39 , is added the phenomenon of formation of a resistive layer of products on the metal surface and subsequent embrittlement thereof, and localized attack on the material 10,13 . The values of i corr increased significantly and in function with the increase in temperature.…”

Section: Al1050mentioning

confidence: 99%

“…Ethanol may contain contaminants such as acetic acid, dissolved oxygen, chlorides, sulphates, and metal ions, all of which derive from the ethanol production process, especially from fermentation and distillation. These contaminants can significantly modify the mechanisms of corrosion, depending on the exposure conditions, weather temperature, pressure or concentration of contaminants [10][11][12][13] . The conclusions about this vary with respect to the experimental conditions proposed by each author, but indicate that the effects of water and contaminant ions as the main propellants of corrosion for metal/bioethanol systems, and to a lesser extent the effect of the increase of conductivity of the ethanol either by the water content or by the generation of acetic acid by oxidation [14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Corrosion Resistance of Commercial Aluminum Alloys in Ethanol Solutions

2018

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In the present research, we studied the corrosion resistance of commercial aluminum alloys exposed to ethanol produced in the northeastern region of Argentina and to commercial ethanol as reference medium. Electrochemical tests of potentiodynamic polarization and weight loss were performed by immersion at temperatures below the boiling point of ethanol (25 °C, 40 °C and 50 °C). The results showed that the increase in the corrosion rate of the alloys is directly proportional to the increase in the temperature of the solution, and that the combined action of contaminants in the alcohol (water, organic acids or aggressive ions) contributed to the increase in the aggressiveness of the environment. Specifically, through the results of the gravimetric tests, corrosion products characteristic of the formation of pitting corrosion and alkoxidation were observed. In contrast to the above, the existence of the pitting corrosion mechanism was demonstrated by defining a pitting potential in the potentiodynamic polarization curves.

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Section: Al1050mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Corrosion Resistance of Commercial Aluminum Alloys in Ethanol Solutions

2018

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“…La corrosión producida por disolventes orgánicos ha sido extensamente estudiada, debido a su importancia técnica e industrial [14][15][16][17][18][19][20][21] . Los mecanismos de corrosión asociados a líquidos orgánicos son más complejos y menos conocidos que los que se producen en disoluciones acuosas.…”

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

“…De Anna [19] , evaluó el comportamiento frente a la corrosión de una fundición y un acero inoxidable austenítico AISI 304L en soluciones alcohólicas con pequeñas adiciones de cloruros, 1,10 -1 a 1,10 -5 M, en forma de HCl. Mediante la obtención de curvas de polarización potenciodinámicas, concluyeron que los cloruros aumentaban la velocidad de corrosión en ambos materiales, especialmente para concentraciones comprendidas entre 1,10 -2 M y 1,10 -3 M. Kabasakaloglu et al [30] , estudiaron el comportamiento de un acero al carbono, variando la [25] .…”

Section: Efecto De La Variación Del Contenido En áCidosunclassified

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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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ChemInform Abstract: THE EFFECTS OF WATER AND CHLORIDE IONS ON THE ELECTROCHEMICAL BEHAVIOR OF IRON AND 304L STAINLESS STEEL IN ALCOHOLS

Anna¹

1985

Chemischer Informationsdienst

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The effects of water and chloride ions on the electrochemical behaviour of iron and 304l stainless steel in alcohols

Cited by 60 publications

References 8 publications

Evaluation of Corrosion Resistance of Commercial Aluminum Alloys in Ethanol Solutions

Evaluation of Corrosion Resistance of Commercial Aluminum Alloys in Ethanol Solutions

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

ChemInform Abstract: THE EFFECTS OF WATER AND CHLORIDE IONS ON THE ELECTROCHEMICAL BEHAVIOR OF IRON AND 304L STAINLESS STEEL IN ALCOHOLS

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