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The results show that as the cooling rate decreases from 1048 \u00b0C\/min to 129 \u00b0C\/min; the size of grain boundary precipitates (GBPs); the width of precipitate-free zones (PFZ); and the content of Zn, Mg, and Cu in GBPs rise, leading to an increase in EXCO depth and consequently higher EXCO susceptibility. Meanwhile, there is a linear relationship between the average corrosion depth and the logarithm of the cooling rate. Corrosion cracks initiate at the grain boundaries (GBs) and primarily propagate along the HAGBs. In the bar grain (BG) sample at lower cooling rates, crack propagation along the sub-grain boundaries (SGBs) was observed. Compared to equiaxed grain (EG) samples, the elongated grain samples exhibit larger GBPs, a wider PFZ, and minor compositional differences in the GBPs, resulting in higher EXCO susceptibility.<\/jats:p>","DOI":"10.3390\/ma16175934","type":"journal-article","created":{"date-parts":[[2023,8,30]],"date-time":"2023-08-30T10:30:52Z","timestamp":1693391452000},"page":"5934","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Effect of Grain Structure and Quenching Rate on the Susceptibility to Exfoliation Corrosion in 7085 Alloy"],"prefix":"10.3390","volume":"16","author":[{"given":"Puli","family":"Cao","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China"},{"name":"Engineering Research Center of the Ministry of Education for Complex Trajectory Processing Technology and Equipment, Xiangtan University, Xiangtan 411105, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengbo","family":"Li","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China"},{"name":"Engineering Research Center of the Ministry of Education for Complex Trajectory Processing Technology and Equipment, Xiangtan University, Xiangtan 411105, China"},{"name":"Guangdong Xingfa Aluminium Co., Ltd., Foshan 528137, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daibo","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China"},{"name":"Engineering Research Center of the Ministry of Education for Complex Trajectory Processing Technology and Equipment, Xiangtan University, Xiangtan 411105, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cai","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China"},{"name":"Engineering Research Center of the Ministry of Education for Complex Trajectory Processing Technology and Equipment, Xiangtan University, Xiangtan 411105, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Xiao","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China"},{"name":"Engineering Research Center of the Ministry of Education for Complex Trajectory Processing Technology and Equipment, Xiangtan University, Xiangtan 411105, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guilan","family":"Xie","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China"},{"name":"Engineering Research Center of the Ministry of Education for Complex Trajectory Processing Technology and Equipment, Xiangtan University, Xiangtan 411105, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,8,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"6666","DOI":"10.1016\/j.actamat.2007.08.021","article-title":"Influence of scandium on the pitting behaviour of Al-Zn-Mg-Cu alloys","volume":"55","author":"Wloka","year":"2007","journal-title":"Acta Mater."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1303","DOI":"10.1016\/j.jmrt.2021.03.070","article-title":"Effects of critical defects on stress corrosion cracking of Al-Zn-Mg-Cu-Zr alloy","volume":"12","author":"Sun","year":"2021","journal-title":"J. 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