Effect of pH on Stress Corrosion Cracking of 7050-T7451 Aluminum Alloy in 3.5 wt% NaCl Solution
Effect of pH on Stress Corrosion Cracking of 7050-T7451 Aluminum Alloy in 3.5 wt% NaCl Solution
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效果%20of%20pH%20on%20应力%20腐蚀%20开裂%20of%207050-T7451%20铝%20合金%20in%203.5%20wt%%20NaCl%20溶液
DOI：
10.5006/1.3585130
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Y. Chang
中科院分区：
文献类型：
--
作者：
Woei Tsai;Jing;J. Yeh;J.‐T. Lee;Y. Chang
采用慢应变速率拉伸（SSRT）技术研究了AA 7050-T7451（UNS A97075）铝合金在3.5wt%NaCl溶液中的应力腐蚀开裂（SCC）行为。研究了应变速率、溶液pH值和溶解氧对铝合金应力腐蚀开裂行为的影响。实验结果表明，在应变速率为8.0×10−7s−1时，短横向取向试样易发生应力腐蚀开裂。7050-T7451合金在3.5wt%NaCl溶液中的抗应力腐蚀性能随溶解氧的存在或溶液酸度的增加而降低。
Abstract The stress corrosion cracking (SCC) behavior of AA 7050-T7451 (UNS A97075) aluminum alloy in 3.5 wt% NaCl solution has been studied using slow strain rate tension (SSRT) technique. The effects of strain rate, solution pH, and dissolved oxygen on the SCC behavior of the aluminum alloy has been investigated. The experimental results show that specimen with short transversal orientation is susceptible to SCC at a strain rate of 8.0×10−7s−1. The results also indicate that the SCC resistance of 7050-T7451 alloy in 3.5 wt% NaCl solution decreases with the presence of dissolved oxygen or with increasing the solution acidity.