钛钢复合板表面结构及与有机涂层的结合性能

利用高能喷涂技术制备钛钢复合板,喷钛涂层中将不可避免会产生孔隙和裂纹,这将降低钛钢复合板的性能,为此采用几类市售有机涂料以及实验室自制的纳米改性丙烯酸涂料对喷钛涂层进行封孔处理.利用扫描电镜分析了喷钛涂层的表面结构以及与有机涂层的结合形貌,同时通过电化学测试和盐雾试验对比了不同有机涂层/钛钢复合板的耐腐蚀性能.结果表明,采用纳米TiO2,SiO2改性的丙烯酸涂料更适合用作喷钛涂层的封闭涂料,能够与喷钛涂层起协同作用共同保护底材.

Surface Structure of Ti/steel Clad Plate and Combination with Organic Coatings

Ti/steel clad plate is usually prepared by high energy plasma spray technology, which is hard to avoid pores and cracks degrading the performance of Ti film. Therefore, several kinds of representative commercial organic coatings and nano-modified acrylic coating were used for the hole sealing treatment. The surface structure of Ti film and combination with organic coatings were observed by SEM. Moreover, electrochemical test and salt spray tests were conducted to compare different corrosion resistances of Ti/steel clad plates with organic coatings. In conclusion, the results showed that nano-modified acrylic coating was more suitable as a hole sealing coating for Ti/steel clad plates due to the synergistic protection of sprayed Ti film and nano-modified acrylic coating.