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Abstract
Folic acid salt (sodium folate) was studied as an eco-friendly and non-toxic copper corrosion inhibitor in 3.5% NaCl solution. Electrochemical impedance spectroscopy, polarization resistance and weight-loss measurements show that the inhibitor efficiency increases with concentration (the highest value- approx. 96% was reported for the solution containing 16 mM sodium folate after 24 h). EIS data and Tafel plots indicate that sodium folate is a barrier, mixed-type (with predominant cathodic character) inhibitor. Inhibitor efficiency decreases with temperature, which suggests that adsorption has physical character rather than chemical one - adsorption free energy calculated using the Langmuir model is consistent with this statement. Activation energy determined from the Arrhenius plot increases as a result of inhibitor presence. Efficiency of the inhibitor increases systematically during the first 12 hours of immersion. Potential chemical changes in sodium folate solution were investigated using UV-VIS spectroscopy. Furthermore, copper surface after immersion in the presence and absence of inhibitor was characterized with scanning electron microscopy, energy-dispersive X-Ray spectroscopy and microscopic photographs.
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- Publication version
- Submitted Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jiec.2024.07.035
- License
- Copyright
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- Category:
- Articles
- Type:
- artykuły w czasopismach dostępnych w wersji elektronicznej [także online]
- Published in:
-
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
ISSN: 1226-086X - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Kwiatkowski H., Krakowiak S., Gaweł Ł., Vitamin B9 as a new eco-friendly corrosion inhibitor for copper in 3.5% NaCl solution, JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2024,10.1016/j.jiec.2024.07.035
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.jiec.2024.07.035
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
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