摘要
采用电化学测试、腐蚀失重测量和SEM表面微观分析等试验方法,研究了炭纤维环氧复合材料浸泡在腐蚀介质中,由于腐蚀介质的存在和作用,对炭纤维环氧复合材料腐蚀行为的影响;同时对偶接了LY12CZ铝合金的炭纤维环氧复合材料也进行了腐蚀浸泡对比试验。结果表明,炭纤维环氧复合材料在3.5％NaCl腐蚀介质中,由于氧扩散的作用,开路电位需要近10h才能达到平衡,其腐蚀电位较正,树脂及树脂与纤维界面对腐蚀介质的吸湿,导致复合材料本身腐蚀增重。浸泡1464h后炭纤维环氧复合材料的表面微观形貌变化不大;在同样的浸泡条件下,偶接了LY12CZ铝合金对炭纤维环氧复合材料的腐蚀行为基本没有影响。
Electrochemical test, weight loss and SEM morphology were used to study the corrosion behavior of graphite epoxy composite materials (GECM). Electrochemical and immersion corrosion test were conducted in 3.5% NaCl solution. The corrosion behavior of GECM coupled with the LY12CZ aluminum alloy was also observed in immersion test. The results showed that open-circuit potential of GECM was more positive because the slow diffusion rate of oxygen and could reach equilibrium potential until about 10 h immersion. Absorption of corrosion media made the weight gain of GECM. The surface morphology of GECM did not change greatly after 1464 h immersion corrosion. The corrosion behavior of GECM was not affected basically by galvanic corrosion between LY12CZ aluminum alloy and GECM.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2004年第4期16-19,共4页
Journal of Materials Engineering
基金
国家重点基础研究发展规划项目(G1999065004)
