publication . Article . 2017

Corrosion Resistance of 7475-T7351 Aluminum Alloy Plate for Aviation

LIU Ming; LI Hui-qu; CHEN Jun-zhou; LI Guo-ai; CHEN Gao-hong;
Open Access Chinese
  • Published: 01 Sep 2017 Journal: Journal of Materials Engineering (issn: 1001-4381, eissn: 1001-4381, Copyright policy)
  • Publisher: Journal of Materials Engineering
Abstract
The intergranular corrosion and exfoliation corrosion properties of 7475-T7351 aluminum alloy plate for aviation were investigated, and the corrosion behaviors of the alloy were analyzed by metallographic analysis(MA) and transmission electron microscope(TEM). The results show that no obvious intergranular corrosion is observed, but exfoliation corrosion grade of 7475-T7351 aluminum alloy increases from EA on surface to EC in the core. The exfoliation corrosion of 7475 alloy plate is mainly because of the typical lamellar structure, and the pathway formed by galvanic corrosion on grain boundary. The expansion of grain boundary corrosion product volume produces t...
Subjects
free text keywords: 7475 aluminum alloy, intergranular corrosion, exfoliation corrosion, recrystallization, Materials of engineering and construction. Mechanics of materials, TA401-492
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