高强铝合金腐蚀等级的近似量化

飞机主要结构材料--高强铝合金的腐蚀损伤程度的定性检测采用目视法,为了使目视法的评定结果量化或近似量化,本文通过EXCO模拟实验,测量了LY12CZ和7075T7351铝合金在不同腐蚀等级时的最大腐蚀深度;通过对数据的统计分析,建立了二者之间的对应关系,使上述2种高强铝合金的腐蚀等级近似量化.由此,通过腐蚀等级的评定,可以推测LY12CZ和7075T7351铝合金最大腐蚀深度的大致范围,从而提高了目视法的应用价值.

Half-Quantification of High Strength Aluminum Alloy's Corrosion Rank

Corrosion rank of high strength aluminum alloy in aircraft by visional inspection is a qualitative but simple method,while the most reliable parameter that reflects the corrosion of aluminum is the maximum corrosion depth.In order to make corrosion rank more reliable, corrosion rank and maximum corrosion depth of two high strength aluminum alloys (LY12CZ and 7075T7351) in EXCO solution was measured.At each corrosion rank,a number of corrosion depth data were obtained.With the statistic analysis, the relationship between the rank and the depth was established.So,corrosion rank of LY12CZ and 7075T7351 aluminum alloy in EXCO solution was half quantified. By determining corrosion rank, the maximum corrosion depth of LY12CZ and 7075T7351 aluminum alloy can be evaluated approximately.