Influencing factors for resistance performance of Cu/C composites to liquid Ga corrosion

The interface characteristics and corrosion behavior of Cu/C composites subjected to static corrosion in liquid gallium (Ga) were investigated. The results revealed that the wettability of Cu/C composites and liquid Ga was weakened by C phase, and the progress of corrosion was effectively hindered by C phase. At 720 h following corrosion, the corrosion thickness loss of Cu/C composites was only 33.37% of that of Cu. The corrosion products of Cu/C composites and Cu in liquid Ga were CuGa2. The CuGa2 and the residual C phase generated by the corroded Cu/C composites formed a mixed corrosion product layer, effectively preventing the composites from being corroded by liquid Ga. The diffusion of atoms can be blocked by C phase during the corrosion process, and thus the corrosion of the Cu/C composites and the growth of CuGa2 are inhibited.