ISSN (online) : 2395 - 7549

 
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5



6

A Short Review on Aluminium Anodizing: An Eco-Friendly Metal Finishing Process


Author(s):

Nisha Mathew , MAR ATHANASIUS COLLEGE OF ENGINEERING

Keywords:

Aluminium, Anodizing, Corrosion, Oxide layer, Sealing

Abstract:

Protection of aluminium alloys is most commonly done by forming anodic films. Anodic films can also be formed on metals like titanium, zinc, magnesium, niobium, and tantalum. Aluminium alloy parts are anodized to greatly increase the thickness of the natural oxide layer for corrosion resistance. A thin aluminium oxide film, that seals the aluminium from further oxidation when it is exposed to air. The anodizing process increases the thickness of the oxidized surface. Anodizing is accomplished by immersing the aluminium into an acid electrolyte bath and passing an electric current through the medium. In an anodizing cell, the aluminium work piece is made the anode by connecting it to the positive terminal of a dc power supply and the cathode is connected to the negative terminal of the dc source. Sealing is needed to seal the pores in oxide layer to prevent further corrosion. Oxide layer on the anodized aluminium has a highly ordered, porous structure that allows for secondary processes such as dyeing, printing and sealing. Nanowires and nanotubes can be made by using the pores in the oxide layer as templates.

Other Details:

Manuscript Id :J4RV2I6004
Published in :Volume : 2, Issue : 6
Publication Date: 01/09/2016
Page(s): 5-9
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2395 - 7549

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2395 - 7549

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