Chen S.-YHuang C.-YCHAO-SUNG LIN2021-08-052021-08-0520210010938Xhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85102084701&doi=10.1016%2fj.corsci.2021.109354&partnerID=40&md5=e2b0aed394e83c51af11e39df0fccd41https://scholars.lib.ntu.edu.tw/handle/123456789/576882The microstructural evolution of AA7075-T6 aluminum alloy during alkaline cleaning in NaOH solution and desmutting in HNO3 solution was studied. AA7075-T6 contained micro-sized Mg-Si and Al-Fe-Cu constituent particles. After desmutting, Mg-Si particles transformed to Si-O particles, leaving gaps with the aluminum matrix. The aluminum matrix nearby Al-Fe-Cu particles suffered slight trenching corrosion; meanwhile, the corrosion of Al-Fe-Cu particles varied from slight corrosion, dealloying, and nano-scale galvanic corrosion induced by re-deposited Cu particulates. After alkaline cleaning and desmutting, the microstructure of constituent particles was inhomogeneous although a uniform, 5 ? 15-nm-thick Al oxide/hydroxide film covered the aluminum matrix. ? 2021 Elsevier LtdAluminum alloys; Aluminum coatings; Aluminum corrosion; Aluminum oxide; Cleaning; Copper corrosion; Galvanic corrosion; Iron alloys; Microstructure; Nanotechnology; Sodium hydroxide; Ternary alloys; 7075-T6 aluminium alloys; A aluminum; Alkaline cleaning; Aluminium matrix; B AES; B TEM; C acidic corrosion; C alkaline corrosion; C de-alloying; Inhomogeneities; Dealloyingjournal article10.1016/j.corsci.2021.1093542-s2.0-85102084701