Biodiesel compatibility with carbon steel and HDPE parts

Maru, Márcia Marie; Lucchese, Márcia Maria; Legnani, Cristiano; Quirino, Welber G.; Balbo, Andrea; Aranha, Isabele Bulhões; Costa, Lucas Teixeira; Vilani, Cecília; Sena, Lídia Ágata de; Damasceno, J. C.; Cruz, Talita dos Santos; Lidizio, Leandro Reis; Silva, Rui; Jório, Ado; Achete, Carlos A.

doi:10.1016/j.fuproc.2009.05.014

Cited by 77 publications

(47 citation statements)

References 11 publications

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“…92,93 To analyze the behavior of polymeric materials exposed to mixtures of fuels, many studies have used continuous immersion tests. 94,95 The results of polymer degradation are established from structural changes, mass gain, mass loss, dimensional changes and a variation of mechanical properties such as hardness, tensile strength, bending, etc.…”

Section: Effects Of Biodiesel On the Degradation Of Polymeric Materiamentioning

confidence: 99%

“…It has been reported that palm oil biodiesel blended with diesel (B10) causes the swelling of hydrogenated nitrile butadiene rubber (HNBR) and changes in elongation, which increase with immersion time. 95 Maru et al 92 investigated the interaction between soybean and sunflower biodiesels with high density polyethylene (HDPE) through static immersion tests at a temperature of 60 °C during 125 days. Figure 12 shows the HDPE weight variation after 125 days of immersion in diesel and in two different biodiesels.…”

Section: Effects Of Biodiesel On the Degradation Of Polymeric Materiamentioning

confidence: 99%

“…Maru et al 92 used different characterization techniques such as optical microscopy and the Raman and Fourier transform infrared (FTIR) spectroscopies to characterize the effects of soybean and sunflower biodiesels on HDPE. The FTIR spectrum of HDPE revealed a new peak around 1740 cm -1 which is assigned to the C=O group present in the biodiesel.…”

Section: Techniques For Studying the Degradation Of Polymeric Materialsmentioning

confidence: 99%

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The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Zuleta¹,

Baena

Ríos³

et al. 2012

J. Braz. Chem. Soc.

142

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O objetivo deste artigo é analisar as principais questões com relação às estabilidades oxidativa e de armazenamento de biodiesel e como elas afetam diferentes materiais metálicos e poliméricos presentes em peças de automóvel e em estruturas de armazenamento de biodiesel. Adicionalmente, este trabalho apresenta uma revisão das técnicas para a medição da estabilidade oxidativa e para avaliação da degradação de materiais metálicos e poliméricos. Quando biodiesel é oxidado, ocorre uma série de mudanças nas suas propriedades, tais mudanças afetam não só a qualidade do biodiesel, mas também as propriedades dos materiais que estão em contato com o biodiesel. Com a oxidação, propriedades do biodiesel como o índice de acidez, índice de peróxidos e viscosidade aumentam, entretanto os índices de iodo e teor de ésteres metílicos diminuem. As alterações das propriedades químicas e físicas do biodiesel podem afetar a integridade e a estabilidade dos materiais que estão em contato com o combustível. A atual situação relacionada com a estabilidade dos materiais revistos neste artigo poderia limitar o uso extensivo de biodiesel, como tem sido proposto em vários países, e deveria ser considerada como um fenômeno de grande importância na tecnologia de biodiesel.The purpose of this paper is to analyze the main issues concerned with the oxidative and storage stabilities of biodiesel and how they affect different metallic and polymeric materials present in automotive parts and in biodiesel storage structures. In addition, this work presents a review of the techniques used for measuring the oxidative stability and for evaluating the degradation of metallic and polymeric materials. When biodiesel is oxidized, a series of changes in its properties occurs. These changes not only affect biodiesel quality, but also the properties of the materials that are in contact with it. Upon oxidation, biodiesel properties like the acid value, peroxide value and viscosity increase, while the iodine value and the content of methyl esters decrease. The changes in the chemical and physical properties of biodiesel can affect the integrity and stability of the material. The situation reviewed in this paper, which talks about the stability of materials, could limit the extensive use of biodiesel. Such measures have been proposed in several countries, and it is a topic of great importance for biodiesel technology.

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Section: Effects Of Biodiesel On the Degradation Of Polymeric Materiamentioning

confidence: 99%

Section: Effects Of Biodiesel On the Degradation Of Polymeric Materiamentioning

confidence: 99%

Section: Techniques For Studying the Degradation Of Polymeric Materialsmentioning

confidence: 99%

See 1 more Smart Citation

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Zuleta¹,

Baena

Ríos³

et al. 2012

J. Braz. Chem. Soc.

142

View full text Add to dashboard Cite

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“…Since these will come into contact with the polyethylene parts of automotive engines such as tanks [13] (if they are not protected by physical barriers such as fluorinated polymers). The question arises do the UFEs interact with the PE oxidative aging process to the detriment of the polymer durability?…”

Section: Introductionmentioning

confidence: 99%

Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Richaud¹,

Fayolle²,

Verdú³

et al. 2013

Polymer Degradation and Stability

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tThe thermal oxidation of polyethylene (PE) impregnated by the methyl esters of unsaturated fatty acids (UFEs) was studied using chemiluminescence, and infra-red spectrophotometry. It was shown that the presence of UFEs accelerates the PE aging process. This can be interpreted as a co-oxidation phenomenon. In this study, the previously established models for PE and UFEs self-oxidation have been coupled in order to develop a co-oxidation model. Using the existing rate constants for the PE and UFEs selfoxidations, this model can simulate the complex shape of the kinetic curves of PE-UFE co-oxidation.

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“…Sin embargo, aún no se ha determinado si esta agresividad está dentro de los límites tolerables para los componentes automotrices [2]. Además, en la literatura se señala que la interacción entre los metales y los biocombustibles dependerá del origen de estos últimos [4][5][6].…”

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Resistencia a la corrosión de aleaciones Al-Cu en biodiesel

et al. 2018

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RESUMENEn el presente trabajo se evalúa la susceptibilidad frente a la corrosión en biodiesel de aleaciones Al-Cu solidificadas direccionalmente: Al-4,5%Cu y Al-15%Cu (porcentajes en peso), en función al tipo de estructura (columnar, equiaxial o con transición de estructura columnar a equiaxial-TCE) y a la composición química. Se prepararon electrodos de trabajo con los diferentes tipos de estructura y se realizaron estudios electroquímicos de los mismos. Se utilizó biodiesel industrial fabricado a partir de aceite de soja. Debido a su alta resistividad, para la realización de los ensayos electroquímicos, se realizó una extracción acuosa del biodiesel, con el objetivo de obtener la fracción iónica acuosa, que genera el proceso de corrosión. Se llevaron a cabo curvas de polarización potenciodinámica y medidas de espectroscopia de impedancia electroquímica (EIE). Estos estudios se complementaron con observaciones de las probetas mediante microscopia óptica (MO). El análisis de las curvas de polarización potenciodinámicas permite concluir que el efecto de las diferentes estructuras de granos se evidencia sobre el potencial de picado, solamente en la aleación Al-4,5%Cu. Los espectros de impedancia de todas las probetas muestran una doble contribución capacitiva. Los mismos se ajustaron mediante un circuito R(RQ)(RQ). Se encontró que la resistencia a la transferencia de carga aumenta desde la zona columnar hacia la zona equiaxial para las dos aleaciones. Palabras clave: aleaciones Al-Cu, estructuras de grano, biodiesel, corrosión. ABSTRACTThe aim of the present work was to evaluate the susceptibility to corrosion in biodiesel of Al-Cu alloys directionally solidified: Al-4.5wt.%Cu and Al-15wt.% Cu, in function of the type of structure (columnar, equiaxed or columnar-to-equiaxed transition -CET) and chemical composition. Working electrodes were prepared with different types of alloy structures and electrochemical studies data were performed. Industrial biodiesel produced from soybean oil is used. Because of its high resistivity, for performing electrochemical tests, an aqueous extraction of biodiesel was performed, in order to obtain the aqueous ionic fraction, which generates the corrosion process. Potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) were carried out. These studies were supplemented by observations of the specimens by optical microscopy (OM). The analysis of potentiodynamic polarization curves allows to conclude that the effect of different grain structures is an evidence of the pitting potential, only in the Al-4.5wt.%Cu alloy. Impedance spectra of all samples show a double capacitive contribution. They were simulated using a R(RQ)(RQ) circuit. It was found that the resistance to charge transfer increased from the columnar zone to the equiaxed zone for the two alloys.

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Biodiesel compatibility with carbon steel and HDPE parts

Cited by 77 publications

References 11 publications

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

The oxidative stability of biodiesel and its impact on the deterioration of metallic and polymeric materials: a review

Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems

Resistencia a la corrosión de aleaciones Al-Cu en biodiesel

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