将碳纤维环氧复合材料(GECM)与三种不同表面状态(脉冲阳极化、镀铝钝化以及不作任何处理)的TC16钛合金进行偶对, 研究了GECM的开路电位和电化学极化, 及不同偶对的电偶腐蚀行为。结果表明: GECM具有正的开路电位, 而且较为稳定, 随极化时间的延长, 电位呈缓慢降低的趋势; GECM与脉冲阳极化钛合金偶对的平均电偶电流密度最小, 为0.003 μA·cm-2, 其次为GECM与不作任何处理钛合金偶对的, 为0.024 μA·cm-2, 而GECM与钛合金镀铝钝化偶对的最大, 为6.270 μA·cm-2; 钛合金表面经脉冲阳极化处理后, 可有效降低甚至消除钛合金与GECM间的电偶腐蚀。

The electrochemical polarization and open circuit potential of graphite epoxy composite material(GECM)were studied, as well as the galvanic corrosion of couples of graphite epoxy composite material(GECM) and the titanium alloy TC16 after different surface treatment (impulse anodization, aluminized passivation and no-treatment). The results show that the open circuit potential of the GECM was positive and stable, and decreased slowly with polarization time. The galvanic couple with TC16 after impulse anodized treatment displayed the smallest average galvanic corrosion current density of 0.003 μA·cm-2, followed by 0.024 μA·cm-2 when galvanic couple with TC16 without treatment, and the maximum of 6.270 μA·cm-2 were obtained when galvanic couple with TC16 after aluminized passivation. It was shown that impulse anodization of TC16 could effectively reduced or even eliminated the galvanic corrosion between the GECM and the titanium alloy TC16.