摘要
为提升直升机典型结构在海洋环境下的抗腐蚀能力,设计了直升机典型结构的模拟试验件,在试验件表面分别喷涂了两种新型有机涂层(X,Y涂层)和一种传统有机涂层(Z涂层),并进行10个周期的加速腐蚀试验。通过涂层的腐蚀前后的形貌、失光率和电化学阻抗的测试,对比了新、旧防护涂层对直升机典型结构的防护能力,结果表明:经过10周期的加速腐蚀试验后,X涂层失光率为1.1%、Y涂层失光率为11.49%、Z涂层失光率为27.45%,X涂层和Y涂层外观基本完整,Z涂层部分区域出现剥落。电化学测试结果表明,经过10周期加速腐蚀后,X涂层的阻抗保持在107Ω·cm2以上,Y涂层在106~107Ω·cm2之间,Z涂层的阻抗下降至接近106Ω·cm2。X涂层抗腐蚀性能最优异,Y涂层耐蚀性次之,Z涂层耐蚀性最差,X涂层更加适用于海洋环境。
In order to analyze the corrosion resistance of the helicopter organic coating in marine environment,simulation structural test pieces were designed while the two newly developed organic coating(X,Y coatings)and the original organic coating(Z coating)were respectively applied to the structure test pieces.The structural part was subjected to an accelerated corrosion test of 10 cycles.The corrosion of coating was characterized by morphology,gloss measurement,and electrochemical impedance spectroscopy to verify the corrosion resistance of the coatings.The test results show that after 10 cycles corrosion,the gloss loss rate of the X coating is maintained in the 1.1%,Y coating is 11.49%and Z coating is 27.45%.X coating and Y coating are basically complete after the test,but some area of Z coating peeled off.Electrochemical impedance spectroscopy show that the impedance of the X coating is more than 107Ω·cm2,and the impedances of the Y is between 106~107Ω·cm2 while the Z coating decrease to 106Ω·cm2.The X coating has the best corrosion resistance,Y coating had middle corrosion resistance and the Z coating was worst.So X coating is more suitable for use in the marine environment.
作者
冯晨旭
张晓娟
崔腾飞
于晴
杨丽媛
FENG Chen-xu;ZHANG Xiao-juan;CUI Teng-fei;YU Qing;YANG Li-yuan(China Helicopter Research and Development Institute,Jingdezhen 333001;Beijing Institute of Aeronautical Material,Beijing 100095)
出处
《环境技术》
2020年第6期8-13,21,共7页
Environmental Technology
基金
国防科技工业技术基础科研项目(JSHS201713B001)。
关键词
直升机
有机涂层
钢
耐蚀性
加速腐蚀试验
helicopter
organic coating
steel
corrosion-resistant
accelerated corrosion test
