Fatty Amidine as Copper Corrosion Inhibitor

The development of green and sustainable corrosion inhibitors for copper in a corrosive marine environment is highly desired. Herein, we studied the fatty acid-based amidine as the new type of renewable corrosion inhibitor. Stearamidine salt was used as a model inhibitor, and it was synthesized thro...

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Bibliographic Details
Published in:Journal of chemistry 2020-11, Vol.2020 (2020), p.1-8
Main Authors: Apriliyanto, Yusuf Bramastya, Dawolo, Januari, Darmawan, Noviyan, Mas’ud, Zainal Alim
Format: Article
Language:English
Subjects:
Adsorption
Chemical inhibitors
Chemisorption
Copper
Copper products
Corrosion
Corrosion and anti-corrosives
Corrosion inhibitors
Efficiency
Fatty acids
Interaction parameters
Marine environment
Metals
Saline water
Seawater
Sustainable development
Thermodynamics
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Summary:The development of green and sustainable corrosion inhibitors for copper in a corrosive marine environment is highly desired. Herein, we studied the fatty acid-based amidine as the new type of renewable corrosion inhibitor. Stearamidine salt was used as a model inhibitor, and it was synthesized through stearonitrile intermediate with an excellent isolated yield of 88%. We used electrochemical (potentiodynamic polarization) and morphological (scanning electron microscopy) measurements to assess the corrosion inhibition efficiency of stearamidine in 3.0 wt.% NaCl at 300 K. We show that, in such a condition, the optimum inhibition efficiency of 96% was achieved using only 0.2 mM stearamidine. The results suggested the fatty amidine is a promising corrosion inhibitor for copper that is suitable in the saltwater ecosystem. The thermodynamic parameters of the interaction between the stearamidine and the copper surface were determined, and the result suggests that the adsorption process occurred accordingly with the Langmuir adsorption isotherm and involved both physisorption and chemisorption.
ISSN:2090-9063
2090-9071
DOI:10.1155/2020/1092643