Changshu anodic oxidation is a kind of anodic oxidation, which has been widely used in industry for a long time. There are many ways to use different names. To sum up, there are the following classification methods:

Changshu anodes are divided into direct current anodizing, alternating current anodizing and pulse current anodizing, which can shorten the production time to reach the required thickness, the film is thick, uniform and dense, and the corrosion resistance is significantly improved.

Changshu anode can be divided into sulfuric acid, oxalic acid, chromic acid, mixed acid and natural coloring anodizing with organic sulfonic acid solution according to electrolyte.

Changshu anode can be divided into ordinary film, hard film (thick film), porcelain film, bright modification layer, barrier layer of semiconductor action and other anodic oxidation according to the film properties.

Galvanic sulfuric acid anodizing is the most widely used because it is suitable for Anodizing of aluminum and most aluminum alloys; The film is thick, hard and wear-resistant, and better corrosion resistance can be obtained after sealing the hole; The film is colorless and transparent, with strong adsorption capacity and easy coloring; Low processing voltage and low power consumption; The treatment process does not need to change the voltage cycle, which is conducive to continuous production and practical operation automation; Sulfuric acid has the advantages of less harm to people than chromic acid, wide supply and low price.