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What is the anodizing process and the definition of anodizing

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Author : jett NG
Update time : 2021-04-29 19:24:28

What is the anodizing process and the definition of anodizing

 

In the anodic oxidation of aluminum, aluminum and its alloy are placed in the corresponding electrolyte (such as sulfuric acid, chromic acid, oxalic acid, etc.) as the anode, under specific conditions and the action of external current, electrolysis is carried out. The anodic aluminum or its alloy is oxidized to form an alumina film on the surface, the thickness of which is 5~20 microns, and the hard anodic oxide film can reach 60~200 microns.

 

2. The electrochemical oxidation of a metal or alloy:

 

Anodizing, if not specified, usually refers to the anodizing of sulfuric acid, in addition to metal, other substances do the anodizing caused by oxidation, also known as "anodizing".

 

In reality, the anodic oxidation of aluminum alloy is more, aluminum anodic oxidation is actually a kind of electrolytic oxidation process. The process of forming an oxide film on the surface of an aluminum product (anode) under the action of a corresponding electrolyte, a specific process condition and an applied current. The film has protective, mounting and other functional properties.

 

 

In order to overcome the hard surface of aluminum alloy, wear resistance and other aspects of the defects, expand the scope of application, prolong the service life, surface treatment technology has become an indispensable part of the use of aluminum alloy, and anodic oxidation technology is currently the most widely used and the most successful technology.

 

4. What are the metal surface treatments? And the corresponding processing technology is what

 

Recently a lot of friends consult me, ask me what metal surface treatment contains, when I heard this question, to be honest, all of a sudden a little confused, since the friend raised such a question, I'd better tell you about it. First of all we should know, generally do metal surface treatment is probably what metal. Secondly can correspond to the processing technology.

 

The conventional metal on the market, and the need to do metal surface treatment are: aluminum alloy, stainless steel, magnesium alloy, titanium alloy, die cast aluminum, steel, zinc alloy and so on, then we will tell you the corresponding metal processing technology.

 

1, aluminum alloy is generally done anodic oxidation processing, passivation treatment, electroplating, etching, sandblasting processing and other metal surface treatment techniques.

 

2, stainless steel metal generally corresponding processing technology is: electroplating, polishing, drawing, electrophoresis, PVD, etching, color passivation.

 

3. Magnesium alloy metal, with light texture, is one of the most widely used metals in the market at present. The commonly used processing techniques are: anodic oxidation processing, passivation film, electroplating and other processing techniques.

 

4, titanium alloy, its properties are acid and alkali resistance, corrosion resistance, hardness, the general corresponding processing technology for anodic oxidation processing, electroplating and other processing techniques.

 

5, zinc alloy, commonly used processing technology: plating and passivation treatment.

6, die casting aluminum, widely used, often used in automotive parts of the workpiece, conventional processing technology: anodic oxidation processing, electroplating, which die casting aluminum will generally use the anodic oxidation process of hard anodic oxidation processing.

 

7, iron and steel: general conventional processing techniques for anodic oxidation processing, electroplating and other techniques.

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