依据相关标准研究了碳纤维复合材料与LY12铝合金的电偶腐蚀行为,结果表明, 碳纤维与LY12铝合金在NaCl溶液中接触时会发生较为严重的电偶腐蚀, 环境温度、电解液浓度和pH对电偶电流有较大的影响。电偶电流随偶接时间的增加大体上呈下降的趋势, 当电解液体系在酸性或碱性条件下, 电偶电流先增大后降低, 并保持在一个较高的水平; 而在中性条件下电偶腐蚀电流相对最小。LY12铝合金电偶腐蚀后, 表面有明显的点蚀坑, 且腐蚀区域变得较为平整。

The galvanic corrosion behavior between carbon fiber composite material and LY12 aluminum alloy was studied in NaCl solution. The results indicate that there was serious galvanic corrosion when the two kinds of materials were coupled in NaCl solution. The galvanic current was evidently affected by environmental temperature, electrolyte concentration and pH of electrolyte. As the coupled time increased, the galvanic current became lower. However, the galvanic current increased in the beginning then reduced lightly; finally it kept an upper level in the acid and alkaline solutions. The galvanic corrosion current was the least in the neutral solution. The surface of corrosive LY12 aluminum alloy had obvious pit corrosion hole, the region of corrosion became much more flat.