晶态磷化工艺与阴极电泳技术的配套性研究

Compatibility Between Crystalline Phosphating Process and Cathodic Electrophoresis

为了探究不同磷化膜与阴极电泳涂装的配套性效果,并研究不同工艺条件对配套性的影响,利用晶态磷化工艺制备的磷化样板作为阴极电泳的基板,考察了电泳电压、电泳时间、电泳温度、膜层耐碱性对电泳漆膜配套性的影响。结果表明:制得的常温低渣磷化膜和改性纳米SiO_2磷化膜均具有优异的耐碱性能,在电泳电压为200~240 V、电泳时间为120~180 s,电泳温度为25~30℃时均能够获得较好的电泳膜层。对电泳后的漆膜涂层进行附着力、杯凸、盐雾划叉等试验测试,同样表明上述制备的两种磷化膜和电泳有较好的配套性,电泳后的漆膜各项性能均能达到国家及行业标准要求。

In order to explore compatibility effect between various phosphate films and cathodic electrophoresis, and study the influences of dif- ferent process conditions on the compatibility, the phosphate coating samples prepared by crystalline phosphating technique were applied to the base plate of cathodic electrophoresis, and the influences of electrophoresis voltage, process time, temperature and alkalic-resistance of coating on the compatibility of electrophoretic paint films were analyzed. Results showed that both the prepared ordinary temperature low-residue phosphate films and modified nano- SiO2 phosphate film possessed excellent alkalic-resistance. With 200-240 V of voltage, 120- 180 s of process time and 25 - 30℃ of temperature, the obtained electrophoresis film was good. By evaluating the paint films after electrophoresis treatment with adhesion experiment, convex cup experiment and salt spray cross experiment, it indicated that both of phosphating films had good compatibility with electrophoresis, and the performance of the electrophoresis paint films could meet the national and industrial standards.