When the surface of the aluminum extrusion alloys is oxidized and spots appear, we can use alkali solution to clean it, so that the aluminum extrusion alloys oxide film with dirt adsorbed can be removed. After the aluminum extrusion alloys oxide film is removed, the aluminum extrusion alloys are placed in distilled water and cleaned several times. Finally, the aluminum extrusion alloys are boiled in distilled water again to close the holes in the aluminum extrusion alloys oxide film. After cleaning, the surface of the aluminum extrusion alloys will be free of spots.

When the surface of aluminum extrusion alloys is oxidized and spots appear, you can soak the aluminum extrusion alloys in dilute acid or dilute alkali, and when there is gas, take out the aluminum extrusion alloys immediately and then wash it with water. You can also use sandpaper to polish the aluminum extrusion alloys spots to recover. You can also use pine perfume to clean the aluminum extrusion alloys with spots.