摘要
为了提高铝合金表面的耐蚀性和与有机涂层的粘接耐久性,首先对铝合金进行水煮(65℃、15min)处理,在其表面形成富含羟基氢氧化物层,然后经两步浸涂后再高温固化(100℃×60min),在被氧化的铝合金表面形成了双-[3-(三乙氧基)硅丙基]四硫化物(BTSPS)和γ-缩水甘油醚丙基三甲氧基硅烷(GPTMS)复合硅烷化膜层。用反射吸收红外光谱、俄歇电子能谱(AES)和扫描电子显微镜(SEM)对复合膜层进行分析和表征。结果表明,在富含羟基氢氧化物的铝合金表面与BTSPS内膜层形成Al-O-Si共价键网络,BTSPS内层与GPTMS外层形成Si-O-Si共价键网络,环氧乙基位于复合膜层最外层。
In order to improve corrosion resistance of Al alloys surface and the bonding durability between Al alloy substance and organic coating, Al alloy was cooked firstly in de-ionized water at 65 ℃ for 15 min and oxyhydroxide layer on Al alloy surface was formed, and then bis - [ triethoxysilyl-propyl] tetrasulfide ( BTSPS) and γglycidoxypropyltrimentox-ysilane (GPTMS) composite silylanization film layer was fashioned on oxidized Al alloy surface by a two- step dip- coating process with further cure at 100 ℃ for 60 min. The composite film layers were analyzed and characterized with reflection - absorption FTIR spectrum, atomic emission spectroscopy ( AES) and scanning electron microscopy ( SEM). The results showed that Al - O - Si covalent bond network were formed between oxyhydroxide film layer on Al alloy and BTSPS inner film layer, Si - 0 - Si covalent bond network are done between inner BTSPS and GPTMS outer layer. Epoxy ethyl group lies outmost the composite film layer.
出处
《材料保护》
CAS
CSCD
北大核心
2007年第11期39-41,共3页
Materials Protection
基金
陕西省自然科学基金(2003F19)
关键词
复合硅烷化膜层
粘接耐久性
铝合金
耐蚀性
composite silylanization film layer
bonding durability
aluminium alloy
corrosion resistance
