铝材表面的自组装成膜新工艺  

New Technology for Self-Assembled Film Formation on Aluminum Surface

作　　者：陈泽民[1] 路品[2] 邢海燕[1] 

机构地区：[1]廊坊师范学院化学与材料科学学院,河北廊坊065000 [2]河北大学化学与环境科学学院,河北保定071002

出　　处：《材料保护》2011年第1期58-59,66,共3页Materials Protection

摘　　要：铝材表面易氧化从而影响后续涂层质量。以有机膦化合物、氨三乙酸和聚环氧琥珀酸为主要原料,采用一步法对铝表面自组装成膜,通过正交试验确定了最佳成膜工艺,将此工艺制得的自组装膜的形貌、性能与传统铬酸盐转化膜比较,并探讨了自组装成膜机理。结果表明:最佳成膜工艺为5.0 mL/L有机膦化合物,5.0 g/L氨三乙酸,2.5 mL/L聚环氧琥珀酸,10.0 g/L氟化钠,pH=6,成膜时间3 min,室温;自组装膜为致密的球状晶态膜,耐蚀性、附着力、抗冲击力均优于传统铬酸盐转化膜。Aluminum surface is liable to oxidation,which causes damage to the quality of coatings thereon.Thus self-assembled film was prepared on the surface of Al via one-step route by using organic phosphorus compound,amino triacetic acid and polyepoxysuccinic acid as the major raw materials.The optimized conditions for preparing the film were determined based on orthogonal tests.The morphology and performance of the self-assembled film were compared with those of conventional chromate conversion coating,and the mechanism of self-assembled film formation was explored.It was found that the optimized solution for preparing self-assembled film consisted of 5.0 mL/L organic phosphorus compound,5.0 g/L amino triacetic acid,2.5 mL/L polyepoxysuccinic acid and 10.0 g/L sodium fluoride,and the optimized conditions for self-assembled film formation were suggested as pH = 6,time of 3 min and room temperature.Resultant self-assembled film composed of spherical crystallines was compact and possessed better corrosion resistance,adhesion to substrate and impact resistance than conventional chromate conversion coating.

关 键 词：自组装成膜 铝 形貌 性能 成膜机理 铬酸盐转化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]