POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EIS
Biodiesel is an alternative fuel obtained from renewable sources. However, during the biodiesel auto-oxidation, reactive compounds could be formed. Those compounds increase the biodiesel corrosivity and the degradation of the fuel. This work presents a study of the corrosion of metals commonly used...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Instituto Colombiano del Petróleo (ICP) - ECOPETROL S.A.
2014-01-01
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| Series: | CT&F Ciencia, Tecnología & Futuro |
| Subjects: | |
| Online Access: | http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-53832014000100007&lng=en&tlng=en |
| _version_ | 1811202920012578816 |
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| author | Jorge A Calderón Libia M Baena Julian Lenis |
| author_facet | Jorge A Calderón Libia M Baena Julian Lenis |
| author_sort | Jorge A Calderón |
| collection | DOAJ |
| description | Biodiesel is an alternative fuel obtained from renewable sources. However, during the biodiesel auto-oxidation, reactive compounds could be formed. Those compounds increase the biodiesel corrosivity and the degradation of the fuel. This work presents a study of the corrosion of metals commonly used in auto-parts exposed to biodiesel and biodiesel-fatty acids blends. Electrochemical Impedance Spectroscopy (EIS) measurements were performed during the exposition time in order to determine the susceptibility of the metals to corrosion. The polarization resistance (Rp) values at the initial exposition times were of the order of 1x10(9) ohm·cm², and the associated capacitances were of the order of 10-11 F·cm-2 for all metals. The Nyquist impedance diagrams of copper and carbon steel -immersed in biodiesel-fatty acid blends after the second day of immersion- showed at least 2 capacitive loops. Although the capacitance values of lowest frequency loop are still too small (10-9 F·cm-2) to be associated with a metal double layer capacitance, the values of these capacitances increased with the increment of the exposition time. It is possible that for longer times of exposition, the electrochemical parameter related with the lowest capacitive loop of the impedance can be associated to the metal corrosion phenomena. |
| first_indexed | 2024-04-12T02:45:57Z |
| format | Article |
| id | doaj.art-0d3a9b1c81aa4919949cb71beadde24d |
| institution | Directory Open Access Journal |
| issn | 0122-5383 |
| language | English |
| last_indexed | 2024-04-12T02:45:57Z |
| publishDate | 2014-01-01 |
| publisher | Instituto Colombiano del Petróleo (ICP) - ECOPETROL S.A. |
| record_format | Article |
| series | CT&F Ciencia, Tecnología & Futuro |
| spelling | doaj.art-0d3a9b1c81aa4919949cb71beadde24d2022-12-22T03:51:09ZengInstituto Colombiano del Petróleo (ICP) - ECOPETROL S.A.CT&F Ciencia, Tecnología & Futuro0122-53832014-01-01548596S0122-53832014000100007POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EISJorge A Calderón0Libia M Baena1Julian Lenis2Universidad de AntioquiaUniversidad de AntioquiaUniversidad de AntioquiaBiodiesel is an alternative fuel obtained from renewable sources. However, during the biodiesel auto-oxidation, reactive compounds could be formed. Those compounds increase the biodiesel corrosivity and the degradation of the fuel. This work presents a study of the corrosion of metals commonly used in auto-parts exposed to biodiesel and biodiesel-fatty acids blends. Electrochemical Impedance Spectroscopy (EIS) measurements were performed during the exposition time in order to determine the susceptibility of the metals to corrosion. The polarization resistance (Rp) values at the initial exposition times were of the order of 1x10(9) ohm·cm², and the associated capacitances were of the order of 10-11 F·cm-2 for all metals. The Nyquist impedance diagrams of copper and carbon steel -immersed in biodiesel-fatty acid blends after the second day of immersion- showed at least 2 capacitive loops. Although the capacitance values of lowest frequency loop are still too small (10-9 F·cm-2) to be associated with a metal double layer capacitance, the values of these capacitances increased with the increment of the exposition time. It is possible that for longer times of exposition, the electrochemical parameter related with the lowest capacitive loop of the impedance can be associated to the metal corrosion phenomena.http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-53832014000100007&lng=en&tlng=enBiodieselCorrosiónEspectroscopia de impedancia electroquímica |
| spellingShingle | Jorge A Calderón Libia M Baena Julian Lenis POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EIS CT&F Ciencia, Tecnología & Futuro Biodiesel Corrosión Espectroscopia de impedancia electroquímica |
| title | POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EIS |
| title_full | POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EIS |
| title_fullStr | POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EIS |
| title_full_unstemmed | POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EIS |
| title_short | POSSIBILITIES OF CORROSION ASSESSMENT OF METALS IN BIODIESEL USING EIS |
| title_sort | possibilities of corrosion assessment of metals in biodiesel using eis |
| topic | Biodiesel Corrosión Espectroscopia de impedancia electroquímica |
| url | http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-53832014000100007&lng=en&tlng=en |
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