高强铝合金加速腐蚀方法的研究

An Investingation on Corrosion Accelerating Testing Methods for High Strength Aluminum Alloys

以ｐＨ＝ ３．０ 的５％ ＮａＣｌ＋ ０．５％ （ＮＨ４ ）２ＳＯ４ 溶液（用醋酸调整ｐＨ 值）为加速剂，对ＬＹ１２ 和 ＬＣ４ 两种高强铝合金进行了间歇盐雾和周期轮浸腐蚀试验。结果表明，两种加速腐蚀方法之间有类似的腐蚀动力学规律，其中前者相对于大气腐蚀有较好的模拟性和加速性。根据材料腐蚀动力学规律提出了“参照腐蚀率”的概念，并以此作为腐蚀程度的评估准则，定量评定了间歇盐雾相对于大气腐蚀的加速性。

Using 5%NaCl+0.5%(NH\-4)\-2SO\-4 solution as accelerant, the intermittent salt\|fog test and periodically eimmersing corrosion test were carried out on two kinds of high strength aluminum alloy LY12 and LC4. The results showed that the corrosion dy\|namics rule is the same for two tests. According to the corrosion dynamics rule, the authors suggested a concept of “reference corrosion rate”, used as an evaluation criterion for corrosion.