Etching behavior of aluminum alloy extrusions
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Date
2014-10-16
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SpringerLink
Abstract
The etching treatment is an important process step in influencing the surface
quality of anodized aluminum alloy extrusions. The aim of etching is to produce
a homogeneously matte surface. However, in the etching process, further
surface imperfections can be generated on the extrusion surface due to uneven
materials loss from different microstructural components. These surface
imperfections formed prior to anodizing can significantly influence the surface
quality of the final anodized extrusion products. In this article, various factors
that influence the materials loss during alkaline etching of aluminum alloy
extrusions are investigated. The influencing variables considered include
etching process parameters, Fe-rich particles, Mg-Si precipitates, and extrusion
profiles. This study provides a basis for improving the surface quality in
industrial extrusion products by optimizing various process parameters. © 2014, The Minerals, Metals & Materials Society.
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Keywords
Aluminium, Alloys, Etching, Microstructure, Acid neutralizing capacity, Homogenization methods
Citation
Zhu, H. (2014). Etching Behavior of Aluminum Alloy Extrusions. JOM, 66(11), 2222-2228. doi:10.1007/s11837-014-1176-8