Category of anodic oxidation, most commonly used in anodic oxidation

Anodic oxidation has long been widely used in industry, such as magnesium anode, magnesium alloy anode, aluminum anode and so on. In these anodized applications, we classify them according to the needs of the application. Do you know the classification of anodic oxidation and what is the most common method of anodic oxidation?

Knowledge 1: Anodic oxidation classification method

1. According to current type. We can divide it into: dc anodic oxidation, alternating current anodic oxidation, pulse current anodic oxidation.

2, according to the electrolyte. We can be divided into: sulfuric acid, oxalic acid, chromic acid, mixed acid and natural colored anodic oxidation of solution based on sulphuric organic acid.

3, according to the nature of the film. We can divide them into: ordinary film, hard film (thick film), porcelain film, bright modification layer, semiconductor function of the barrier layer and so on

Knowledge 2: Use the most common method of anodizing

The application of direct current sulfuric acid anodizing method is the most common, because it is suitable for aluminum anode and most of the aluminum alloy anodizing treatment. The selection of direct current sulfuric acid anodic oxidation method has many advantages. First of all, the film layer is thick, hard and wear resistant, strong adsorption capacity, sealing hole can get better corrosion resistance; Second, the processing voltage is low, less power consumption, is conducive to resource saving; Finally, sulfuric acid is less harmful to people than chromic acid, and its price is lower, and so on.