Corrosion protection mechanism of 2-mercaptobenzothiazole and its potential synergistic effect with cerium ions for treatment of AA 2024-T3
| Autor: | G.E. Thompson, A. C. Balaskas, Michele Curioni |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
General Chemical Engineering
Intermetallic chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chloride 0104 chemical sciences Analytical Chemistry Corrosion Dielectric spectroscopy Corrosion inhibitor chemistry.chemical_compound Cerium Electrochemical noise chemistry Aluminium Electrochemistry medicine 0210 nano-technology Nuclear chemistry medicine.drug |
| Zdroj: | Balaskas, A C, Curioni, M & Thompson, G E 2020, ' Corrosion protection mechanism of 2-mercaptobenzothiazole and its potential synergistic effect with cerium ions for treatment of AA 2024-T3 ', Journal of Electroanalytical Chemistry, vol. 863, pp. 114081 . https://doi.org/10.1016/j.jelechem.2020.114081 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2020.114081 |
| Popis: | The corrosion protection mechanism of 2-mercaptobenzothiazole (2-MBT) and its potential synergistic effect with cerium chloride (CeCl3) for sustainability of the aerospace alloy AA 2024-T3 was investigated. The corrosion inhibitors 2-MBT and CeCl3 and their potential synergistic properties were assessed with image-assisted electrochemical noise, the split-cell technique, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) observations. It is suggested that 2-MBT inhibits the dealloying of S-phase particles and prevents the formation of Cu-rich particles on the surface of AA 2024-T3. 2-MBT protects the second phase particles from corrosion and offers sustainability in 3.5% NaCl solution by formation of a protective layer on the surface of AA 2024-T3. Additionally, 2-MBT is adsorbed on the surface of AA 2024-T3 during anodic dissolution of aluminium. A synergistic effect between 2-MBT and the Ce3+ based corrosion inhibitor was not found. It is suggested that 2-MBT protects the intermetallic particles from corrosion from the early immersion time and blocks the precipitation of cerium hydroxides over the second phase particles. 2-MBT revealed better corrosion protection properties compared with CeCl3 and 2-MBT + CeCl3 in the tested time scale. |
| Databáze: | OpenAIRE |
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