Anticorrosion Research of Fe-Si Intermetallics in Molten Aluminum
The corrosion resistance of different Fe-Si intermetallics with different phases in molten aluminum under different temperature was tested,and the fracture mode was analyzed.The results show that the sample Fe50Si50(wt,%) has the best anticorrosion ability in molten aluminum,sample SiC is the next and sample Fe75Si25 is the worst.Though the corrosion resistance weakening with the temperature rising,the sample Fe50Si50 still has a good resistance after 96h corrosion in molten aluminum at 950℃.In addition,we have found that Al didn't displace Fe atom and react with it during the long corrosion time;from another point,surface defect probably is the root cause of the corrosion.