舰载直升机雷达罩新型腐蚀防护技术验证研究

A New Type of Corrosion Protection Technology for Radome of Shipboard Helicopter

为提高直升机雷达罩在海洋环境下的耐蚀性能,研究了雷达罩常用铝合金材料的表面处理、连接形式的耐蚀性,并针对表面处理工艺和连接形式进行了腐蚀防护改进设计,采用加速腐蚀试验10个周期验证改进的合理性。测试了试验前后试样的表面形貌、腐蚀坑型号和深度。试验结果表明微弧氧化表面处理代替原有铬酸氧化处理,可提高铝合金耐蚀性,将铝合金连接形式由螺栓连接改为铆钉连接,能大大提高连接部位的耐腐蚀性,必要时可在铆钉周围涂覆缓蚀剂,能进一步提高结构耐蚀性。本文所采用的改进方法合理可行,能有效提升雷达罩结构的海洋环境适应性。

In order to improve the corrosion resistance of the helicopter radome in the marine environment,the corrosion resistance of the surface treatment and connection form of the commonly used aluminum alloy material for the radome was studied,and the corrosion protection improvement design was carried out for the surface treatment process and connection form,and the rationality of the improvement was verified by 10 cycles of accelerated corrosion test.The surface morphology,corrosion pit type and depth of the samples before and after the test were measured.The test results show that the micro arc oxidation surface treatment can improve the corrosion resistance of aluminum alloy instead of the original chromic acid oxidation treatment.Changing the connection form of aluminum alloy instead of the original chromic acid oxidation treatment.Changing the connection form of aluminum alloy form bolt connection to rivet connection can greatly improve the corrosion resistance of the connection part.If necessary,the corrosion inhibitor can be coated around the rivet to further improve the structure corrosion resistance.The improved method adopted in this paper is reasonable and feasible,which can effectively improve the adaptability of the radome structure to the marine environment.