| Abstract |
| Galvanic corrosion between 6061Al matrix and reinforcements such as graphite, SiC and Al_2O_3 phases has been studied in the deaerated, the open to air and the aerated 0.1N NaCl solutions. Based on the mixed-potential theory, the galvanic currents were measured by using the zero-resistance ammeter and the potentiodynamic polarization curves between 6061Al and reinforcements. Experimental results showed that the galvanic current densities of 6061Al-graphite couple were much higher values than those of 6061Al-SiC and 6061Al-Al_2O_3 couples. As the dissolved oxygen concentration and the surface ratio of reinforcements/6061Al matrix increased, the galvanic current densities were observed to increase. |
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| Key Words |
| Galvanic corrosion, Metal matrix composites, Reinforcement, Mixed-potential theory, Zero-resistance ammeter |
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