溶胶电泳沉积法在304不锈钢表面制备γ-Al_2O_3涂层  

Preparation of γ-Al_2O_3 coating on 304 stainless steel by sol electrophoretic deposition

作　　者：宋万仓[1] 刘志禹[1] 谭涓[1] 任厚民[1] 徐绍平[1] 刘靖[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116024

出　　处：《电镀与涂饰》2010年第11期74-77,共4页Electroplating & Finishing

基　　金：国家高技术研究发展计划(2008AA05Z407)

摘　　要：采用溶胶电泳沉积法在304不锈钢表面上制备了γ-Al2O3涂层。通过扫描电镜(SEM)、X射线衍射(XRD)等手段对制备的γ-Al2O3涂层进行了表征,并采用超声波振荡考察了涂层的结合牢固度,讨论了电泳沉积液中γ-AlOOH溶胶的体积分数、纳米Al2O3的质量浓度、沉积电压、沉积时间及搅拌速率对γ-Al2O3涂层性能的影响。结果表明:将溶胶加入到无水乙醇溶液中可制得稳定的电泳沉积液,添加纳米Al2O3可提高涂层沉积量和稳定性。当电泳沉积液中γ-AlOOH溶胶的体积分数为30%～40%,纳米Al2O3加入量为20～30g/L,搅拌速率为375r/min时,电压10V下沉积5～10min,然后在600°C下焙烧3h,所得到的γ-Al2O3涂层结合牢固。γ-Al2O3 coatings were prepared on 304 stainless steel by sol electrophoretic deposition, and characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The adhesion of coating was examined by ultrasonic vibration. The factors affecting the coating performance were studied, including the volume fraction of 7-A1OOH sol and the mass concentration of nano-sized alumina in electrophoretic deposition solution, deposition voltage and time, and stirring rate. The results indicated that a stable electrophoretic deposition solution can be obtained by the addition of γ-AlOOH sol to absolute ethanol, and the deposition weight and stability of coating improved by the addition of nano-Al2O3 . The γ-Al2O3 coating obtained with γ-AlOOH sol 30%-40% （volume fraction） and nano-alumina 20-30 g/L at deposition voltage of 10 V and stirring rate of 375 r/min for 5-10 min is well adhered after calcination at 600℃ for 3 h.

关 键 词：溶胶电泳沉积 304不锈钢 纳米氧化铝涂层 结合 牢固性 

分 类 号：TG174.451[金属学及工艺—金属表面处理] TG178[金属学及工艺—金属学]