摘要
采用电化学阻抗技术研究了碳化硅颗粒增强 ２０２４铝基复合材料（ＳｉＣｐ／２０２４Ａｌ）硫酸阳极氧化膜在 ３．５％ＮａＣｌ水 溶液中的耐蚀性；作为比较，对 ２０２４ Ａｌ的阳极氧化膜耐蚀性也进行了研究 结果表明，ＳｉＣｐ／２０２４Ａｌ复合材料的阳极氧化膜 具有良好的耐 ＮａＣｌ溶液腐蚀的能力，而且重铬酸盐封闭比热水封闭的阳极氧化膜耐蚀性更好．由于氧化膜中出ＳｉＣ颗粒的存在破 坏了氧化膜的完整性和均匀性，故复合材料阳极氧化膜的耐蚀性不如 ２０２４ Ａｌ合金．
The corrosion resistance of sulfuric acid anodized film on the SiC particle reinforced 2024 aluminum metal matrix composite (SiCp/2024Al MMC) in 3.5% NaCl aqueous solution was investigated using electrochemical impedance spectroscopy and compared with that of sulfuric acid anodized 2024 Al. The results show that the anodized film on SiCp/2024Al provides satisfactory corrosion resistance in 3.5% NaCl solution, and the corrosion resistance of the film sealing in dichromate solution is better than in hot water. The anodized film on SiCp/2024Al is not as effective as on 2024Al because the homogenity of the anodized layer is destrpued by SiC particulates.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第8期869-872,共4页
Acta Metallurgica Sinica
基金
高等学校博士学科点专项科研基金资助项目 97014517
金属腐蚀与防护国家重点实验室资助项目
国家自然科学基金资助项目59
关键词
阳极氧化
电化学阻抗谱
耐蚀性
碳化硅
铝基复合材料
SiCp/2024Al composite
anodizing
electrochemical impedance spectroscopy
corrosion resistance
