| Autor: |
Yan Liang, Zhao Fu Du, Chunlin He, Ying Ying Bai, Dong Liang Zhao, Jian Ming Wang, Guo Feng Ma |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
Advanced Materials Research. 1046:50-53 |
| ISSN: |
1662-8985 |
| DOI: |
10.4028/www.scientific.net/amr.1046.50 |
| Popis: |
The effect of artificial aging on the corrosion resistance of 2024 Al alloy was investigated by field emission scanning electron microscope (FE-SEM) and accelerated corrosion test. For comparison, the solution treatment followed by air-cooled and water-quenched samples were also researched. Accelerated corrosion test revealed that the corrosion resistance of the alloy strongly depended on artificial aging times, and the weight gain of the aged alloy increased first and then decreased with increasing the aging times, and a maximum value was found at peak aged condition. The air-cooled sample had the highest weight gain while the water-quenched one had the lowest weight gain among all the samples. The corrosion morphologies showed that pitting and localized intergranular corrosion were the main corrosion forms for the air-cooled and aged 2024 Al alloys. However, only pitting corrosion took place on the water-quenched samples. The pitting and intergranular corrosion resulted from galvanic corrosion between secondary particles and matrix Al, and between grain boundary precipitates and matrix Al, respectively. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
