Black anodized aluminium coil is the most widely used tape. This alloy has high strength, especially with fatigue resistance, high plasticity and corrosion resistance, and cannot be strengthened by heat treatment. The plasticity is good when hardened by semi-cold work. Low plasticity during hardening, good corrosion resistance, good weldability, poor cutting performance, and polishability.
Aluminum-magnesium alloy also contains a small amount of manganese, chromium, beryllium, titanium and so on. Except for a small amount of solid solution, most of the manganese in the alloy forms MnAl6. The role of chromium in Black anodized aluminium coil is similar to that of manganese, improving the ability to resist stress corrosion cracking, increasing the strength of the base metal and the weld, and reducing the tendency of welding cracks, but its content generally does not exceed 0.35%.

 
The main purpose Black anodized aluminium coil:
(1) Improve the wear resistance, corrosion resistance and weathering resistance of parts.
(2) The transparent film produced by oxidation can be made into various colored films by coloring.
(3) As a capacitor dielectric film.
(4) Improve the cohesion with organic coatings. Used as the bottom coat.
(5) As the bottom layer of electroplating and enamel.
(6) Other applications under development, such as solar energy absorption panels, ultra-high hard films, dry lubricating films, catalyst films, nanowires, and magnetic alloys deposited in porous films as memory elements