Five Simple Methods For Testing Anodic Oxidation Film

- Oct 21, 2019-

One, look at color

The surface gloss of pure aluminum with oxide film was decreased, and cast aluminum and miscellaneous aluminum were grey black.The surface of the unformed oxide film is bright white with metallic luster.

Two, Measure resistance

The oxide film has been formed when the detection of resistance, atmospheric pressure is not conductive.The test chamber without oxide film can conduct electricity.

Three, scratches

The surface of the oxide film has been formed is very hard, slip when using the needle, no scratch, the surface of the oxide film has not been formed is very soft, with the needle when using the resistance and scratch.

Four, listen to the sound

When the oxide film has been produced by knocking, it will make a clear sound, and when the oxide film has not been produced by knocking, it will make a muffled sound.

Five, color inspection

Those that have formed an oxide film and are not closed can be colored quickly in the dyeing solution, while those that have not formed an oxide film cannot be colored in the dye solution.