摘要
从现役飞机结构腐蚀损伤外场调研数据入手 ,对飞机结构主要材料 LY1 2 CZ的腐蚀特征量进行了统计分析。结果表明 ,给定时间下腐蚀损伤深度服从 Weibull分布 ;给定可靠度下 ,腐蚀深度 (d)随时间的变化符合 Sigmoid曲线规律 ;在较为恶劣环境下某型机内部件防腐涂层的有效期约为 2 .
The corrosion depth of LY12CZ aluminum alloy was obtained by investigation in the service condition. A statistical study of corrosion characteristic quantity (CCQ) for these aluminum alloys was carried out. The results show that the corrosion depth is in conformity with Weibull distribution in given time. Corrosion depth (d m ) was fitted to Sigmoid function curve of the service time which included exposure to the environment and flying time. The period of validity of the anticorrosion layer is about 2.5 years in severe service environments.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2002年第3期245-251,共7页
Acta Aeronautica et Astronautica Sinica
基金
黄玉珊先生基金
关键词
铝合金
局部腐蚀
点蚀
最大腐蚀深度
统计分析
aluminum alloy
localized corrosion
pitting corrosion
maximum corrosion depth
statistical analysis
