压气机叶片用耐冲刷防腐有机涂层的制备及性能研究

目的 提高压气机叶片有机涂层的耐冲刷和防腐性能.方法 以氨基改性环氧树脂为粘接剂,通过加入高硬度Al2O3填料以及其他着色、防锈颜料,并充分分散,制备一种具有耐冲刷防腐功能的有机涂层.通过摆杆硬度测试、磨耗测试、冲刷测试、腐蚀测试及其他力学性能测试,对耐冲刷防腐有机涂层的综合性能进行评价,对比高硬度Al2O3填料含量对涂层性能的影响.结果 添加高硬度Al2O3填料,有效提高了涂层的硬度、耐磨耗性和冲刷性.当添加量为15％(质量分数)时,性能达到最优,硬度为0.92,冲刷失效时间为常温的475 s和高温的385 s,相比未添加氧化铝时,性能提高了300％以上.进一步添加氧化铝填料将对涂层形貌和粗糙度有较大劣化影响,硬度和耐冲刷性都相应降低,但耐磨耗性数据却在不断提高,涂层的摆杆硬度更能反映真实的耐冲刷能力.研制的耐冲刷有机涂层综合性能优异,相比渗铝等无机涂层工艺,该涂层还具有腐蚀防护的特性.结论 高硬度Al2O3填料的加入可以有效提高涂层的耐冲刷能力,但需控制添加量,以免影响涂层的粗糙度,有机耐冲刷涂层的腐蚀防护性能相比传统无机涂层具有明显优势.

Fabrication and Evaluation of an Organic Coating for Anti-scouring and Anti-corrosion Application on Compressor Blades

To improve the scouring and corrosion resistance of organic coating on compressor blades, in this paper, hard Al2O3 fillers with other coloring and rust-prevent pigments were dispersed in amino modified epoxy resin. Pendulum hardness, abrasion test, scouring test, corrosion display and mechanical test were taken to value the properties of the organic coatings. It shows that the addition with Al2O3 fillers was effectively strengthened on hardness, abrasion and scouring resistance, which peaked when amount was 15%wt(mass fraction). Such coating showed 0.92 pendulum hardness, breakdown time of 475 s in room temperature and 385 s in high temperature, and its properties improved by 300% compared with the blank coating. Nevertheless, morphology and roughness were influenced with further addition of Al2O3, thus lowered pendulum hardness and breakdown time, while abrasion resistance was increasing still. Hence, it is the pendulum hardness of coatings that actual scouring properties relies on rather than conventional abrasive test. The anti-scouring and anti-corrosion organic coatings fabricated achieved good general performance and superior corrosion resistance compared with traditional aluminized inorganic layer.