纳米氧化锆材料等离子喷涂涂层性能研究及应用

Performance of Plasma Sprayed Nano-structured Zirconia Coating Applied to Ship

舰船设备表面在高温、高湿、盐雾、酸雾的作用下产生严重腐蚀,需要进行有效防护。文章在解决纳米氧化锆等离子喷涂工艺的基础上,成功地获得各种厚度的涂层,并采用王水对纳米氧化锆材料涂层进行耐酸性试验。通过电子显微镜(SEM)观察到王水侵蚀后的涂层结构仍然完整致密,具有很好的耐酸性,可应用于舰船防腐防漏。同时对纳米和非纳米氧化锆两种材料涂层的抗热震性能进行比较。试验结果表明,纳米氧化锆材料涂层抗热震性能优于普通氧化锆涂层,可适用于舰船动力装置高温部件隔热防护。

Severe corrosion may occur in the surface of shipboard equipment due to the harmful effects of moist, high temperature, salt fog and acid fume. An investigation was therefore carried out into the plasma spraying procedure of nano-structured zirconia coating. By this procedure, a wide range of thickness of coating was obtained. A test was conducted to expose the plasma sprayed nano-structured coating to the royal water. The sampling material immersed in the eroding water was then examined via electron telescope and found that it remained intact in structure. Such an excellent acid-proof performance is quite suitable to material protection from corrosion and leakage. Moreover, thermal shock resistance of the two structures, i.e. nano-structured and conventional zirconia coating were also compared. The results show that the former＇s thermal shock resistance is much better than the latter＇s and has a potential application to the high temperature parts of propulsion system for thermal protection.