Study of the corrosion inhibition of copper in synthetic seawater by Equisetum arvense as green corrosion inhibitor
| Autor: | M. G. Valladares-Cisneros, A. Esquivel-López, C. Cuevas-Arteaga |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
biology
Chemistry General Chemical Engineering Chemical structure Artificial seawater chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology biology.organism_classification Electrochemistry 01 natural sciences Copper 0104 chemical sciences Dielectric spectroscopy Corrosion inhibitor chemistry.chemical_compound Equisetum arvense Fourier transform infrared spectroscopy 0210 nano-technology Nuclear chemistry |
| Zdroj: | Revista Mexicana de Ingeniería Química. 19:603-616 |
| ISSN: | 2395-8472 1665-2738 |
| DOI: | 10.24275/rmiq/mat629 |
| Popis: | Extract of the stems of Equisetum arvense was studied as a natural corrosion inhibitor (NCI) in synthetic seawater exposing samples of copper. To determine the protection of the metal by the NCI, electrochemical tests using potentiodynamic polarization curves, electrochemical impedance spectroscopy and linear polarization resistance were performed at room temperature. The morphological characterization of the material with and without NCI was carried out by scanning electron microscopy. The chemical composition of the NCI was determined by Fourier transform-infrared spectroscopy (FTIR) and gas chromatography coupled to mass spectrometry (GC-MS). The results showed that Equisetum arvense acts as a mixed-type NCI, achieving an inhibition efficiency of 53.78% when using 1000 ppm of NCI. From EIS the charge transfer resistance increased in the first 21 h, obtaining an inhibition efficiency of 87.5%. LPR results showed similar behavior than EIS at the same concentration. FTIR revealed that the chemical structure of the compounds of methanol extract of Equisetum arvense have functional groups such as: -OH, C-H, C=O and C-O, whereas GC-MS showed that eight compounds are present in the NCI. |
| Databáze: | OpenAIRE |
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