The effect of the equal‐channel angular pressing (ECAP) process on the pitting corrosion behavior of ultrafine‐grained aluminum was evaluated based on statistical analysis. The microstructural evolution, mechanical properties, and corrosion behavior were investigated. ECAP breakdowns/redistributes intermetallic particles, which contributes to a decrease in the local chemical heterogeneity. Higher average pitting potential (E_pit) values were observed after processing, but this improvement was neither significant nor sequential with each ECAP pass. Finally, the statistical analysis of the data and their dispersion did not lead to the conclusion that ECAP improves the corrosion resistance of aluminum, in view of the widely varying E_pit values observed.

中文翻译：

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ECAP处理超细晶粒铝的点蚀行为：统计分析

基于统计分析，评估了等通道角挤压（ECAP）工艺对超细晶粒铝点蚀行为的影响。研究了组织演变，力学性能和腐蚀行为。ECAP分解/重新分布金属间颗粒，这有助于降低局部化学异质性。加工后观察到更高的平均点蚀电位（E _pit）值，但是这种改进既无明显意义，又无随每次ECAP传递而提高。最后，鉴于观察到的E_坑值变化很大，数据的统计分析及其离散性并未得出ECAP改善铝的耐蚀性的结论。