研究了高温宽带铁氧体在切削液、NaCl溶液和湿热环境三种典型环境中的锈蚀特点,分析了锈蚀规律和锈蚀机理,并测试了锈蚀对铁氧体吸波性能和黏结性能的影响。结果表明:该铁氧体在NaCl溶液和湿热环境中均容易产生锈蚀,在NaCl溶液中,铁氧体表面被锈蚀物均匀覆盖,锈蚀物会脱落溶解到溶液中,在湿热环境中,铁氧体表面由于锈蚀介质分布不均,产生非均匀锈蚀,干燥后形成非均匀痂状锈蚀层和球状锈蚀物;无论是在NaCl溶液中还是在湿热环境中,锈蚀仅发生于材料表面,并不会向材料内部渗透;高温宽带铁氧体的锈蚀会对材料的吸波性能和黏结性能产生影响,导致天线产品的吸波性能波动和界面黏结性能恶化。

The corrosion characteristics of high-temperature broadband ferrite were studied in three typical environments including cutting fluid, NaCl solution and a hygrothermal environment. The corrosion law and mechanism were analyzed, and the effects of corrosion on wave absorbing properties and adhesive property of the ferrite were studied. The results show that the ferrite was easy to corrode in NaCl solution and hygrothermal environment. In NaCl solution, the surface of the ferrite was evenly covered by corrosion products, and corrosion products fell off and dissolved in the solution. In the hygrothermal environment, nonuniform corrosion appeared because of the uneven distribution of corrosive medium on the ferrite surfaces. Scabby corrosion layers and spherical corrosion products formed after drying. Corrosion only occurred on the surfaces of the material, and did not penetrated into the material, whether in the NaCl solution or in the hygrothermal environment. The corrosion of the high-temperature broadband ferrite had serious impact on the wave absorbing properties and the adhesive property of the material, resulting in the fluctuation of wave absorbing properties and the deterioration of interface bonding of antenna products.