安全型憎水剂对飞机金属连接结构腐蚀行为的影响研究OA

Aircraft is inevitably subjected to environmental corrosion during service.By forming a moisture barrier,hydrophobic coatings significantly control the local corrosive environment,thereby improving the corrosion resis-tance of localized aircraft surfaces,it contributes significantly to flight safety assurance and service life extension of aircraft.The traditional hydrophobic agent has the drawback of being flammable due to the mixture of gasoline.Therefore,a safe hydrophobic agent is prepared in this paper by selecting non-flammable solvents and performing orthogonal experiments for the components.The preferred component ratio is determined through contact angle measurements.Subsequently,the basic properties of the safety hydrophobic agent are investigated.And compre-hensive environmental corrosion tests of typical metal joint structures of aircraft are carried out to investigate the ef-fect of safety hydrophobic agents on the corrosion behavior of connection structures.The performance testing and morphology analysis results indicate that,the prepared hydrophobic agent has the characteristics of transparency and non-flammability,and shows good compatibility with aviation coatings.And the corrosion resistance of the structures is significantly improved after hydrophobic treatment.Compared to pre-assembly treatment,post-assembly hydrophobic treatment more effectively suppresses the occurrence of structural corrosion.