5005 Alloy Aluminum Coil

Aluminum alloy 5005 coil nominally contains 0.8 percent magnesium. It has medium strength, good weldability and good resistance to corrosion in the marine atmosphere. It also has the low density and excellent thermal conductivity common to all aluminum alloys. It is the most common grade of aluminum in sheet and plate form.

Aluminum 5005 coil is a poor aluminum-magnesium alloy that can be hardened by cold working: it cannot be heat treated to achieve higher strengths.

Corrosion resistance of aluminum alloy 5005

Corrosion resistance 5005 has the same high resistance to general corrosion as other non-heat treatable aluminum alloys. It also has the higher resistance to weak alkaline conditions common to the 5000 series alloys. 5005 has an atmospheric corrosion resistance similar to that of 3003.

When anodized to improve corrosion resistance, the film on 5005 is more transparent than that on 3003 and has a better color match to 6063 architectural profiles.

The corrosion resistance of aluminum alloys depends on the protective surface oxide film, which can be easily repaired by the rapid reaction between aluminum and oxygen when the oxide film is damaged. However, if the film cannot be repaired, the high reactivity of the base metal will corrode rapidly, making aluminum alloys unsuitable for use with reducing media.