Studying the effect of chemical solution on corrosion behavior of SiC and Al2O3 reinforced aluminum composite materials

الملخص EN

Corrosion behavior of aluminum matrix composites (MMCs) with (10, 20 and 30) weight fraction of each alumina and silicon carbide was investigated in 10 % (NaCl, NaOH and HCl) solutions at different temperatures (40, 60, 80 and 100) °C also at room temperature.

The results showed the corrosion rate was increased with increasing in weight fraction of alumina and silica as reinforcement due to discontinues protective film in addition to increasing in temperatures at 10 % HCl solution, it reached (8.252 mpy) by reinforced with SiC.

Alumina was exhibited corrosion resistant better than SiC due to it is insulator; galvanic corrosion occurs when incorporation of semiconductor SiC only.

Specimens were exposed to NaOH solution, aluminum reinforced with Al2O3 and SiC appears poor corrosion resistance.

Finally, the results of effect NaCl were investigated, appeared an increase in corrosion rate with increasing in time.