期刊
CORROSION SCIENCE
卷 206, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110479
关键词
High-strength Al alloys; Nano-treating; Nanoparticles; Corrosion; Electrochemistry
资金
- National Science Foundation through the UC Irvine Materials Research Science and Engineering Center [DMR-2011967]
In this study, the corrosion performance of nano-treated AA7075 alloys was investigated, and it was found that nano-treatment can enhance the corrosion resistance of aluminum alloys, especially localized corrosion resistance.
High-strength Al alloys like Al-Zn-Mg-Cu series are susceptible to corrosion attacks. Nano-treating is an emerging metallurgical method to enhance their performance. However, there lacks an understanding of nanoparticles' effects on their corrosion. In this study, corrosion performance of two nano-treated cast and extruded AA7075 alloys (with TiC and TiB2) was investigated. Their dynamical corrosion characteristics on freshly exposed, passivated, and immersed surfaces were compared. The interplays among microstructures, oxidation passivation, and corrosion were revealed. The results show nano-treating enhances corrosion resistance of AA7075, particularly localized corrosion resistance. This study has advanced the multi-scale understanding of corrosion in nanotreated AA7075.
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