Metals and Materials International ( IF 3.3 ) Pub Date : 2021-08-07 , DOI: 10.1007/s12540-021-01008-4 Diaoyu Zhou 1 , Jing Fan 1 , Taotao Li 2
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Abstract
Effects of plastic deformation on the corrosion behaviors of AA6061 aluminum alloy have been investigated in this work. AA6061 was severely deformed by cold rolling processes and the corrosion behaviors were measured using electrochemical tests in 3.5 wt% NaCl neutral solution. The microstructures were characterized by SEM combined with EDS. The results showed that plastic deformation induced the decrease of average pitting potential and increase of corrosion rate of AA6061 due to the number increase and size decrease of second-phase particles, which formed "small cathode-large anode" micro-battery corrosion mechanism with the aluminum alloy matrix. The influence of crystallographic texture on corrosion property is analyzed and a simple relation between average pitting corrosion coefficient and texture coefficient is built and supported by experiments to elucidate the effects of plastic deformation on corrosion.
Graphic Abstract
中文翻译：
塑性变形和织构对冷轧AA6061在NaCl中性溶液中腐蚀的影响
摘要
本文研究了塑性变形对 AA6061 铝合金腐蚀行为的影响。AA6061 在冷轧过程中严重变形，在 3.5 wt% NaCl 中性溶液中使用电化学测试测量腐蚀行为。通过SEM结合EDS表征微观结构。结果表明，塑性变形引起AA6061平均点蚀电位的降低和腐蚀速率的增加，这是由于第二相颗粒数量的增加和尺寸的减小，形成了“小阴极-大阳极”微电池腐蚀机制。铝合金基体。
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