Oxidation Treatment of Aluminum Tube Anodized Aluminum Tube

The best solution to the problem of aluminum tube rusting is to anodize the aluminum tube.

The principle of aluminum anodization is essentially the principle of water electrolysis. When the current passes, the following reactions will occur:

On the cathode, H2 is released according to the following reaction:

2H + + 2e → H2

On the anode:

4OH-4e → 2H2O + O2

The precipitated oxygen is not only molecular oxygen (O2) but also atomic oxygen (O) and ionic oxygen (O-2), which are usually represented by molecular oxygen in the reaction.

The aluminum as the anode is oxidized by the oxygen precipitated on it, forming an anhydrous Al2O3 film:

2Al + 3[O] = Al2O3 + 1675.7KJ

It should be pointed out that not all of the generated oxygen interacts with aluminum, and part of it is precipitated in gaseous form.

Simply put, the use of anodizing process to solve the problem of aluminum tube rust is: This method uses aluminum tube or aluminum alloy tube as the anode, which is put into the electrolyte for energization treatment, and the aluminum is placed on the anode The process of forming. The aluminum oxide film formed on the surface by electrolysis is called anodizing treatment of aluminum and aluminum alloy tubes.  

The application of direct current sulfuric acid anodizing is the most common because it has anodizing treatment suitable for aluminum and most aluminum alloys; the film layer is thicker, harder and wear-resistant, and better corrosion resistance can be obtained after sealing; The film is colorless and transparent, has strong adsorption capacity and is easy to color; the processing voltage is low, and the power consumption is low; the processing process does not need to change the voltage cycle, which is conducive to continuous production and practical operation automation; sulfuric acid is less harmful to humans than chromic acid, and has a wide supply, Low price, and other advantages.

Of course, there are processed anodized aluminum tubes on the market now. Compared with ordinary aluminum tubes, anodized aluminum tubes are more resistant to corrosion. At the same time, it has higher hardness and better wear resistance. However, due to the different manufacturing methods of various manufacturers and the different aluminum materials used, the quality of the anodized aluminum tubes produced is also uneven. Therefore, choosing a high-quality aluminum tube supplier is particularly important. 

If you need high-quality aluminum tubes or anodized aluminum tubes, you can contact us. we are . We are a professional aluminum tube manufacturer in Shenzhen Pride Industrial Co., Ltd. Our products include but not limited to anodized aluminum tubes.

Please contact us if you need: zhang@pride-cnc.com.