About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Corrosion, Protection and Damage Monitoring of Advanced Materials in Natural and Specific Environments
|
| Presentation Title |
Biofouling and corrosion of magnesium alloys WE43, AM60 and Mg-Zr-Gd-Nd-Y-Zn alloy by Chlorella vulgaris in artificial seawater |
| Author(s) |
Qi Fu, Guang-Ling Song, Xinran Yao |
| On-Site Speaker (Planned) |
Qi Fu |
| Abstract Scope |
When materials are immersed in seawater, their surfaces are prone to severe biofouling and corrosion. Currently, bacterial-induced corrosion has been extensively studied, while researches on algal-induced corrosion remain limited, particularly for magnesium (Mg) alloys that are highly susceptible to corrosion. In this study, the biofouling and corrosion mechanisms for Mg alloys WE43, AM60 and Mg-Zr-Gd-Nd-Y-Zn alloy induced by Chlorella vulgaris (C. vulgaris) were systematically investigated. The results indicated that C. vulgaris without pre-cultivation accelerated the corrosion of WE43 and AM60, but it exhibited a certain inhibitory effect on the Mg-Zr-Gd-Nd-Y-Zn alloy. After pre-cultivation for 7 days, C. vulgaris significantly promoted the rapid breakdown of the surface film for Mg-Zr-Gd-Nd-Y-Zn alloy. Liquid chromatography-mass spectrometry results revealed that organic acids secreted by C. vulgaris were the main culprits of the film rupture. Notably, for the Mg-Zr-Gd-Nd-Y-Zn alloy, low concentration of C. vulgaris cells formed a protective biofilm that inhibited the corrosion. |