Synergistic effect of CeCl3 and benzotriazole on corrosion resistance of naturally aged and artificially aged AA2024 aluminium alloy
| Autor: | Jovanka Kovačina, Biljana Bobić, Bojana Radojković, Bore Jegdić, Dunja Marunkić |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
corrosion inhibitor
Aluminum corrosion Cerium compounds Scanning electron microscope Corrosion resistance pitting corrosion Sodium alloys 02 engineering and technology 01 natural sciences chemistry.chemical_compound Aluminium Corrosive effects Corrosion property Materials Chemistry Electrochemical corrosion Benzotriazoles Pit growth 010302 applied physics Benzotriazole Corrosion inhibitors Naturally aged Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Dielectric spectroscopy cerium visual_art aluminium alloy visual_art.visual_art_medium 0210 nano-technology Electrochemical impedance spectroscopy Scanning electron microscopy Materials science Sodium chloride Alloy Pit formation chemistry.chemical_element engineering.material Corrosion 0103 physical sciences Aluminium alloy Corrosion behaviour NaCl solution benzotriazole Geotechnical Engineering and Engineering Geology Aluminum alloys chemistry Mixtures Synergistic effect engineering Nuclear chemistry |
| Zdroj: | Transactions of Nonferrous Metals Society of China (English Edition) |
| ISSN: | 1003-6326 |
| Popis: | The corrosion behaviours of naturally aged and artificially aged AA2024 aluminium alloys in 0.5 mol/dm3 NaCl solution in the presence of environmentally friendly corrosion inhibitors of 10 mmol/dm3 CeCl3, 10 mmol/dm3 BTA and the inhibitor mixture (5 mmol/dm3 CeCl3 + 5 mmol/dm3 BTA) were analyzed. The goal of this work was to determine the level of the synergistic effect of the inhibitor mixture and to explain the nature of this effect. Corrosion properties of the inhibitor layer were studied using the electrochemical impedance spectroscopy (EIS), while the resistance to pit formation and pit growth was studied by applying potentiodynamic polarisation tests. The results of scanning electron microscopy (SEM/EDS) showed that the size of pits formed in naturally aged aluminium alloy was smaller than that formed in artificially aged alloy. The synergistic effect of the inhibitor mixture on corrosion properties of naturally aged alloy was observed throughout 96 h, and in later phases of testing of artificially aged alloy. The synergistic effect of the inhibitor mixture was not noticed on pit formation and pit growth. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect