Aluminium surfaces are often anodized. This means the deposition of a layer of

examrobotsa's picture

Submitted by examrobotsa on

Q: 111 (IAS/2000)
Aluminium surfaces are often ‘anodized’. This means the deposition of a layer of

question_subject: 

Science

question_exam: 

IAS

stats: 

0,34,35,9,34,5,21

keywords: 

{'aluminium surfaces': [0, 1, 0, 0], 'aluminium oxide': [0, 1, 1, 0], 'zinc oxide': [1, 1, 2, 2], 'nickel oxide': [0, 1, 0, 0], 'chromium oxide': [0, 0, 0, 2], 'deposition': [0, 2, 2, 2], 'layer': [4, 1, 3, 2]}

Aluminium surfaces are often `anodized`, which means the deposition of a layer of aluminium oxide.

Anodizing is an electrochemical process that involves treating the surface of aluminium with an electric current in an acidic electrolyte solution. During the process, a controlled oxidation of the aluminium surface occurs, resulting in the formation of a thick layer of aluminium oxide.

The anodizing process enhances the natural oxide layer on aluminium, making it thicker, more durable, and corrosion-resistant. The anodized aluminium surface also becomes more resistant to wear, scratches, and fading, and it can provide a decorative finish.

The anodized layer is typically transparent and can be left as is for a natural appearance or dyed in various colors for aesthetic purposes. It improves the surface hardness and durability of aluminium, making it suitable for a wide range of applications, including architectural, automotive, and aerospace industries.