Effect of Friction Stir Processing on Corrosion Behavior of AA5083 Aluminum Alloy

Abstract

The corrosion behavior of AA5083 depends on microstructural features such as matrix grain size, second phase size, and distribution of (β-Al 3Mg2) and the nature of Al-Fe-Mn complex dispersoids. in the present work, the effect of grain size on the corrosion behavior of the alloy was studied in a 3.5 wt.% NaCl solution. the grain size was varied via friction stir processing (FSP) by adopting different combinations of tool rotation rate and tool traverse speed. Corrosion behavior was characterized using potentiodynamic polarization measurements and the free corroding potential response with respect to time. in addition, a galvanostatic technique was applied to estimate the pit nucleation and pit repassivation potential of processed alloy samples. the fine grain microstructure, obtained using FSP, exhibited improved corrosion response as compared to the base material. overall corrosion response is presented on a process map.

Department(s)

Materials Science and Engineering

Keywords and Phrases

AA5083 alloy; Corrosion; Friction stir processing; Heat index

International Standard Book Number (ISBN)

978-111800201-8

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Wiley, All rights reserved.

Publication Date

01 Jan 2011

Link to Full Text

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