| Title |
Galvanic Corrosion between 6061Al-Matrix and Reinforcements (graphite, SiC, Al2O3) in 6061Al-Composite |
| Authors |
김석원(Suk Won Kim); 이재봉(Jae Bong Lee) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Galvanic corrosion; Metal matrix composites; Reinforcement; Mixed-potential theory; Zero-resistance ammeter |
| 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. |