Effects of microstructures on corrosion and stress corrosion behaviors of an Al-12.1 at.% Zn alloy

Author: Yeh M.   Tsao L.   Chuang T.  

Publisher: Springer Publishing Company

ISSN: 1059-9495

Source: Journal of Materials Engineering and Performance, Vol.9, Iss.4, 2000-08, pp. : 396-401

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Abstract

Various heat treatments of an Al-12.1 at.% Zn alloy would bring forth various types of microstructures such as solid solution (SS), continuous precipitation (CP), and discontinuous precipitation (DP), each of which contain respective shares of distribution of the aluminum-rich phases (α 0, α) and the zinc-rich phase (β), and the corrosion behaviors of the said alloy may be affected as a result. Electrochemical measurements conducted in a 3 wt.% NaCl solution indicate that respective corrosion rates should be evinced in the following order: supersaturated SS