This work analyzes the feasibility of using gel electrolytes in portable cells to easily perform electrochemical corrosion measurements on carbon steel and galvanized steel components. A gel manufactured from glycerol and agar, with chlorides and optimized conductivity, has been selected for this study. This gel is easily adaptable to nonflat surfaces and has no risk of crevice corrosion interferences during the measurements. Polarization and electrochemical impedance spectroscopy measurements have been performed with a portable cell with a gel electrolyte. The results have been compared to those obtained in a liquid electrolyte with the same saline composition. The effect of using gel electrolytes on the development of the anodic and cathodic processes when the metal surfaces corrode actively has been analyzed in depth. The changes on the composition of outer oxides due to the gel exposure have also been studied by x-ray photospectroscopy to achieve a better understanding of the results. The gel electrolyte has proved to be an adequate medium for obtaining relevant information about the corrosion performance of active carbon and galvanized steel, although it has a somewhat lower aggressiveness than the liquid electrolyte with the same saline composition.
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1 December 2019
Research Article|
October 20 2019
Use of Innovative Gel Electrolytes for Electrochemical Corrosion Measurements on Carbon and Galvanized Steel Surfaces
Gleidys Monrrabal
;
Gleidys Monrrabal
*Materials Science and Engineering Department–IAAB, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Spain.
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Asuncion Bautista
;
Asuncion Bautista
‡
*Materials Science and Engineering Department–IAAB, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Spain.
‡Corresponding author. E-mail: mbautist@ing.uc3m.es.
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Francisco Velasco
Francisco Velasco
*Materials Science and Engineering Department–IAAB, Universidad Carlos III de Madrid, Avenida de la Universidad 30, 28911 Leganés, Spain.
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CORROSION (2019) 75 (12): 1502–1512.
Article history
Received:
July 01 2019
Revision Received:
October 20 2019
Accepted:
October 20 2019
Citation
Gleidys Monrrabal, Asuncion Bautista, Francisco Velasco; Use of Innovative Gel Electrolytes for Electrochemical Corrosion Measurements on Carbon and Galvanized Steel Surfaces. CORROSION 1 December 2019; 75 (12): 1502–1512. doi: https://doi.org/10.5006/3309
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