| Autor: |
Puridetvorakul, Chanika, Poolthong, Nuchthana, Tareelap, Napachat |
| Zdroj: |
Key Engineering Materials; August 2017, Vol. 751 Issue: 1 p101-106, 6p |
| Abstrakt: |
A challenge in producing a sacrificial anode through conventional casting method is that the alloying elements in casting segregate during solidification, which further causes non-uniform anode corrosion reducing anode performance. In this paper, we investigated the performance of Al-5Zn-0.02In anode produced by conventional casting compared with by semi-solid casting technique. The performance of produced anodes were measured in terms of anode potential, current capacity, consumption rate and anode efficiency in 3.5% NaCl solution for 14 days. We found that the microstructure of the conventional cast anode had dendrites and coarse grains and the corrosion caused pitting corrosion. In contrast, the semi-solid cast anode had fine grains without any dendrites. The corrosion attacked mainly the grain boundaries and less on the matrix. Surprisingly, the conventional cast anode has about 10% higher efficiency than that of semi-solid cast anode. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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