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首页> 外文期刊>Journal of Materials Engineering and Performance >Corrosion Behavior of Nano-/Ultrafine-Grained Al-0.2 wt.% Sc Alloy Produced by Accumulative Roll Bonding (ARB)
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Corrosion Behavior of Nano-/Ultrafine-Grained Al-0.2 wt.% Sc Alloy Produced by Accumulative Roll Bonding (ARB)

机译：纳米/超细粒子Al-0.2重量％的腐蚀行为。累积辊粘合剂产生的％SC合金（ARB）

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摘要

The corrosion behavior of the Al-0.2 wt.% Sc alloy fabricated by the accumulative roll bonding (ARB) process in a 3.5 wt.% NaCl solution was studied using the electrochemical impedance spectroscopy and potentiodynamic polarization techniques. The effect of the microstructural parameters, such as dislocation density, texture, grain boundary, and lattice strain, on the corrosion behavior was also investigated in this study. The results demonstrated that the ARB process can significantly improve the corrosion resistance and modify the corrosion potential to attain higher positive potentials. In addition, the pitting corrosion changed into the lateral spreading of the pits at the seventh and tenth cycles of the ARB process with average grain size of 410 and 370 nm, respectively. The change in the fraction of the high-angle grain boundary during the ARB process is the most important parameter regarding the variation in corrosion type. The average grain size of 410 nm in seventh cycle, as the optimum average grain size, demonstrated the highest corrosion resistance.
机译：通过电化学阻抗光谱和电位偏振技术研究了3.5重量％的累积辊粘合（ARB）工艺累积辊粘合（Arb）方法的腐蚀行为。本研究还研究了微观结构参数，例如位错密度，质地，晶界和晶格菌株的效果。结果表明，ARB过程可以显着提高耐腐蚀性，并改变耐腐蚀性以获得更高的正电位。另外，蚀腐蚀分别改变为靶的凹坑的凹坑的横向扩展，其具有平均晶粒尺寸为410和370nm。 ARB过程中高角度晶界的分数的变化是关于腐蚀类型变化的最重要参数。第七个循环平均粒度为410nm，作为最佳平均晶粒尺寸，显示出最高的耐腐蚀性。

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