飞机日历寿命试验的介质成分确定和加速方法

 针对飞机使用环境，研究了飞机日历寿命试验中的腐蚀介质成分确定方法和加速方法。进行了5 ℃,25 ℃,50 ℃这3种温度和4种介质浓度下的30CrMnSiA结构钢和LY12CZ铝合金两种金属的纯腐蚀和腐蚀疲劳试验研究。得到的试验曲线表明，它们的腐蚀动力学规律都近似遵循线性关系，每条曲线的腐蚀速度也基本保持不变。从而认为，飞机日历寿命试验介质成分最好选用飞机所在机场使用环境的各腐蚀介质成分，加速腐蚀试验的最好方法，就是在此机场的各介质成分上加权，加权越高，加速越快。这个结论得到了试验验证。

Corrosion Medium Composition and Accelerated Corrosion Method of Aircraft Calendar Life Test

For the environment of the aircraft in use, the method of the corrosion medium composition and accelerated corrosion are studied. At 5 ℃, 25 ℃ and 50 ℃ separately, under four kinds of corrosion medium concentration, corrosion tests and corrosion fatigue tests of 30CrMnSiA steel and LY12CZ aluminum alloy are studied. The test curves show that the corrosion kinetics rules of them have followed linear relationship approximately and the corrosion rate of each cure basically remains unchanged. Thereby, we think that the corrosion medium composition of the environment in aerodrome is the best choice to aircraft calendar life test and the best mean of accelerated corrosion test is multiplying the corrosion medium composition of the environment in aerodrome, as the multiple become larger, the rate of corrosion is quicker. This conclusion is approved in this article.