M. Casales-Díaz

Universidad Nacional Autónoma de México

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L. Martínez-Gómez

Universidad Nacional Autónoma de México

J. Porcayo-Calderón

Universidad de Sonora

Mohan Kumar Kesarla

Universidad Nacional Autónoma de México

L.M. Martínez de la Escalera

The Center for Public Integrity

Srinivas Godavarthi

Universidad Juárez Autónoma de Tabasco

E. Vázquez‐Vélez

Universidad Autónoma del Estado de Morelos

O. Sotelo-Mazón

Universidad Autónoma del Estado de México

Tathagata Kar

Universidad Nacional Autónoma de México

John Henao

IQE (United Kingdom)

J.G. González-Rodrı́guez

Universidad Autónoma del Estado de Morelos

Cooperative Institutions

Universidad Nacional Autónoma de México

Universidad Autónoma del Estado de Morelos

Centro de Investigación en Materiales Avanzados

Instituto Politécnico Nacional

Consejo Nacional de Humanidades, Ciencias y Tecnologías

IQE (United Kingdom)

Universidad Autónoma del Estado de México

Instituto Tecnológico de Zacatepec

Autonomous University of Queretaro

Tecnológico Nacional de México

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ZIF-8 derived carbon/g-C3N4 – an all-carbon heterojunction for effective photo-decontamination of Cr(VI) from water

Journal of Alloys and Compounds (2023)

María Esperanza Román Abarca Tathagata Kar M. Casales-Díaz J.J. Ramos-Hernández Srinivas Godavarthi

Photocurrent

Carbon nitride

Carbon fibers

10.1016/j.jallcom.2023.170623

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Citations (4)

Electrochemical Analysis and Quantum Chemistry of Castor Oil-Based Corrosion Inhibitors

Current Analytical Chemistry (2016)

Srinivas Godavarthi J. Porcayo-Calderón M. Casales-Díaz E. Vázquez‐Vélez Adrián Neri

Background: Corrosion in industrial structures has generated much concern with regard to material loss, especially in the oil production. Organicmolecules can act as inhibitors because they can be adsorbed at the metal-solution interface, replacing the water molecules and thereby inhibiting the metal dissolution. In general the imidazoline derivatives have unique structure that make them efficient corrosion inhibitors in CO2 environments. Castor oil is the only unsaturated fatty acid occurring in natural vegetable oils with a functional hydroxyl group in the 12C. The presence of OH groups in the fatty acid chains makes the oil unusually polar. Therefore, based on its molecular structure, castor oil or its derivatives can be used as an effective corrosion inhibitor. Methods: Inhibitor used was a hydroxyethyl-imidazoline derivate based on castor oil. Concentrations of inhibitor used were 5, 10, 25, 50 and 100 ppm. Corrosivesolutionusedwasa CO2 saturated mixture (90:10, of 3% NaCl solution and diesel) at 50°C. Corrosion tests were carried out by real-time monitoring and EIS measurements. Results: Real-time monitoring showed that the castor oil-based imidazoline has an inhibition efficiency greater than 99%. From EIS measurementstwodifferentbehaviors were obtained. Evolution of the EIS spectra was similar for additions of 5, 10 and 25 ppm, and for 50 and 100 ppm it was different. For 5, 10 and 25 ppm the evolution of the spectrum in the high frequency region was the characteristic fingerprint of the self-assembled of the oil-based imidazolines. However, for 50 and 100 ppm after 9 hours, the time constant decreased as time passed. This behavior could be due to the presence of the functional groups in the oily-tail which tend to interact with the metallic surface forming a denser inhibitor film. The molecular reactivity (HOMO and LUMO) of the optimized molecule of inhibitor showed that LUMO is moved to unusual location the middle of the molecule due to the presence of double bond in 39C-41C and the hydroxyl group in 45C. Conclusion: Real-time corrosion measurements showed that the inhibition efficiency was greater than 99%. From EIS measurements two different behaviors are observed. Presence of the functional groups in the alkyl chain tend to interact with the metal surface. Quantum chemical calculations showed that LUMO is located in the alkyl chain, favoring a flat-adsorption process. Keywords: Castor oil, green inhibitor, imidazoline, electrochemical sweet corrosion.

Corrosion inhibitor

Imidazoline receptor

10.2174/1573411011666150929233320

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Citations (15)

Sustainable Development of Palm Oil: Synthesis and Electrochemical Performance of Corrosion Inhibitors

Journal of Electrochemical Science and Technology (2017)

J. Porcayo-Calderón Eric M. Rivera‐Muñoz C. Peza-Ledesma M. Casales-Díaz L.M. Martínez de la Escalera

Palm oil production is among the highest worldwide, and it has been mainly used in the food industry and other commodities. Currently, a lot of palm oil production has been destined for the synthesis of biodiesel; however, its use in applications other than the food industry has been questioned. Thereby for a sustainable development, in this paper the use of palm oil of low quality for corrosion inhibitors synthesis is proposed. The performance of the synthesized inhibitors was evaluated by using electrochemical techniques such as open circuit potential measurements, linear polarization resistance and electrochemical impedance spectroscopy. The results indicate that the fatty amides from palm oil are excellent corrosion inhibitors with protection efficiencies greater than 98%. Fatty amides molecules act as cathodic inhibitors decreasing the anodic dissolution of iron. When fatty amides are added, a rapid decrease in the corrosion rate occurs due to the rapid formation of a molecular film onto carbon steel surface. During the adsorption process of the inhibitor a self-organization of the hydrocarbon chains takes place forming a tightly packed hydrophobic film. These results demonstrate that the use of palm oil for the production of green inhibitors promises to be an excellent alternative for a sustainable use of the palm oil production. Keywords: Palm oil, Sustainable development, Corrosion inhibitor, Fatty amides, Electrochemical techniques

Corrosion inhibitor

10.33961/jecst.2017.8.2.133

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Citations (28)

Synthesis of NdAlO3 Nanoparticles and Evaluation of the Catalytic Capacity for Biodiesel Synthesis

Nanomaterials (2019)

Mayra Dionicio-Navarrete C.D. Arrieta-González Alfredo Quinto-Hernandez M. Casales-Díaz J. Zúñiga-Díaz

Biodiesel synthesis was carried out via heterogeneous catalysis of canola oil with nanoparticles of a mixed oxide based on rare earths. The catalyst synthesis (NdAlO3) was carried out based on the method proposed by Pechini for the synthesis of nanoparticles. Thermogravimetric analysis-differential thermal analysis (TGA-DTA) analysis was performed on the nanoparticle precursor gel in order to establish the optimum conditions for its calcination, with these being of 800 °C over 24 h. A pure NdAlO3 compound with an approximate size of 100 nm was obtained. The products of the transesterification reaction were analyzed using gas chromatography, FTIR, and NMR. The optimum reaction conditions were determined, namely, the temperature effect, reaction time, methanol:oil mass ratio, and recyclability of the catalyst. These studies showed the following optimal conditions: 200 °C, 5 h, methanol:oil mass ratio of 6:1, and a constant decrease in the catalytic activity of the catalyst was observed for up to six reuses, which later remained constant at around a 50% conversion rate. The maximum biodiesel yield obtained with the optimum conditions was around 75%. Analysis of the reaction products showed that the residual oil showed a chemical composition different from that of the source oil, and that both the biodiesel and glycerol obtained were of high purity.

Thermogravimetric analysis

10.3390/nano9111545

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Citations (8)

Corrosion protection of 1018 carbon steel using an avocado oil-based inhibitor

Green Chemistry Letters and Reviews (2019)

O. Sotelo-Mazón Benjamín Valdez J. Porcayo-Calderón M. Casales-Díaz John Henao

The corrosion phenomenon in oil and gas industry is a serious issue affecting metallic structures and pipelines. The main aggressive species flowing through oil pipelines is NaCl. The presence of gases in the corrosive medium (CO2 and H2S), increases, even more, its aggressiveness. Usually, to mitigate corrosion, liquid inhibitors are added to the corrosive medium. In the present study, N-hydroxyethyl-imidazoline derivatives of avocado oil was synthesized as a green corrosion inhibitor. The test was performed on 1018 carbon steel at 5, 10, 25, 50 and 100 ppm. Electrochemical techniques as polarization curves (PC), the open circuit potential (OCP), the lineal polarization resistance (LPR) and the electrochemical impedance spectroscopy (EIS) were applied. The results obtained from the OCP indicates that the inhibitor can be classified as a cathodic type one. On the one hand, PC, RPL and EIS determined that the highest corrosion rate was obtained without the inhibitor. On the other hand, by adding inhibitor, the corrosion resistance increased, obtaining the optimal concentration at 10 ppm. The EIS technique in the angle phase format showed the formation of two time constants, which indicates the inhibitor presence. Finally, the SEM analyses showed a minor attack at 5 and 10 ppm.

Corrosion inhibitor

Carbon steel

Carbon fibers

10.1080/17518253.2019.1629698

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Citations (19)

Effect of the Diesel, Inhibitor, and CO₂Additions on the Corrosion Performance of 1018 Carbon Steel in 3% NaCl Solution

Journal of Chemistry (2014)

J. Porcayo-Calderón M. Casales-Díaz L.M. Rivera-Grau D.M. Ortega-Toledo J. A. Ascencio-Gutiérrez

In order to determine the diesel contribution in the coadsorption process of the oil-soluble inhibitors, electrochemical impedance spectroscopy measurements have been carried out to study the performance of oil-soluble inhibitors in both presence and absence of diesel and CO 2 . The results showed that the presence of the oil phase provides some protection to the steel because the water-soluble fractions are capable of being adsorbed on the steel surface thereby reducing the corrosion rate. The oily phase does not contribute to the adsorption process of the inhibitor because the inhibitor is absorbed into the water-soluble fractions. The oil-soluble inhibitors are effective only when the solution is saturated with CO 2 . CO 2 saturation causes a decrease in the pH of the solution causing both an increase of the inhibitor solubility and a better dispersion of the inhibitor into the electrolyte.

Corrosion inhibitor

Carbon steel

Saturation (graph theory)

10.1155/2014/940579

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Citations (26)

Use of a non-ionic gemini-surfactant synthesized from the wasted avocado oil as a CO2- corrosion inhibitor for X-52 steel

Industrial Crops and Products (2019)

Alexis Cruz-Zabalegui E. Vázquez‐Vélez Gonzalo Galicia Aguilar M. Casales-Díaz R. López-Sesenes

Corrosion inhibitor

Langmuir adsorption model

10.1016/j.indcrop.2019.03.011

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Citations (55)

Efecto de la imidazolina [IM-NH17] en el proceso de corrosión del acero api5l-x52 en salmueras acidificadas

Ingeniería Investigación y Tecnología (2009)

Adriana Reynaud-Morales M. Casales-Díaz J.G. Chacón-Nava L. Martínez-Gómez A. Martínez‐Villafañe

ResumenSe estudia la eficiencia de inhibición del compuesto Imidazolina Aminoetil Oleica [IM-NH17]) en la corrosión de un acero API5L-X52 en tres soluciones de salmuera acidificada a pH 3 a una temperatura de 50ºC, empleando pruebas de polarización potenciodinámica y mediciones de resistencia de polarización.Bajo las condiciones de prueba, los resultados de curvas de polarización indicaron que el inhibidor se comporta como un inhibidor de tipo mixto.Los resultados de resistencia de polarización lineal mostraron un incremento en los valores de Rp para las soluciones con inhibidor en comparación con el valor registrado para la solución de referencia sin inhibidor.Así, se encontró que la eficiencia del inhibidor aumenta en el rango de 12.5 ppm a 25 ppm.También, de los resultados se deriva que el modelo de isoterma de Langmuir es el mecanismo de adsorción que mejor se ajusta al presente sistema.

10.22201/fi.25940732e.2009.10n4.033

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Citations (0)

Flame Sprayed LaNi5-Based Mischmetal Alloy: Building-up Negative Electrodes for Potential Application in Ni-Based Batteries

Journal of Thermal Spray Technology (2021)

Carlos A. Poblano-Salas O. Sotelo-Mazón John Henao Jorge Corona‐Castuera Gabriela Martínez

Mischmetal

10.1007/s11666-021-01257-0

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Citations (3)

Carbonized zeolitic imidazolate framework-incorporated electrospun polymeric nanofiber composite for supercapacitor applications

Materials Letters (2024)