The basic principle of Changshu aluminum oxidation anodizing is to take aluminum or aluminum alloy products as anodes, place them in electrolyte solution and use electrolysis to form alumina film on their surface, which is called anodizing treatment of aluminum and aluminum alloy.

In Changshu aluminum oxidation plant, the cathode is made of materials with high chemical stability in electrolytic solution, such as lead, stainless steel, aluminum, etc. The principle of aluminum anodizing is essentially the principle of water electrolysis. When the current passes through, hydrogen is released on the cathode; On the anode, the precipitated oxygen is not only molecular oxygen, but also atomic oxygen (o) and ionic oxygen, which are usually expressed as molecular oxygen in the reaction. As an anode, aluminum is oxidized by the oxygen precipitated on it to form an anhydrous alumina film. Not all the generated oxygen acts with aluminum, and part of it precipitates in gaseous form.

To sum up, many new processes have emerged in the anodizing of aluminum and its alloys, but they are also challenged by various surface treatment methods. It is expected that Changshu aluminum oxidation anodizing technology will still be the main surface treatment method in the next 10 years, but the process technology needs to be continuously improved in order to dominate for a long time.