Anodizing how can it not fade, anodized color

The electrode is anodized by the surface of the metal or the metal with coating, and the black oxide film or coating on the metal surface is colored by the action of the electric field during electrolysis.

The anodized film has a porosity of 20-30% (sulfuric acid film), so it has a huge surface area and chemical activity, and the dye molecules accumulate in the surface layer through the physical and chemical adsorption of the oxide film and develop color.

Chemical adsorption refers to the combination of the oxide film and the pigment body through ionic bonds, covalent bonds or the formation of complexes, and the adsorption force is relatively strong. Compared with chemisorption, the physical adsorption force is weaker and is greatly affected by temperature.

Summary. In general, anodized items will become brighter, but the exact color changes depending on the oxidized material. Generally speaking, metals such as aluminum and titanium will show relatively high brightness colors after anodizing, such as silver, gold, copper, etc.

Dark colors, on the other hand, usually need to be anodized and dyed. Overall, anodizing can effectively improve the hardness and corrosion resistance of a material, as well as improve its aesthetics.

Generally speaking, anodized items will become brighter, but the specific color change depends on the oxidized material. Generally speaking, metals such as aluminum and titanium will show relatively high brightness colors after anodizing, such as silver, gold, copper, etc. On the other hand, the dark color of the trembling canopy usually needs to be anodized and dyed to achieve it.

Overall, anodizing can effectively improve the hardness and corrosion resistance of a material, as well as improve its aesthetics.

Can you add, I don't quite understand it.

Generally speaking, anodized items will become brighter, but the specific color change depends on the oxidized material. Generally speaking, metals such as aluminum and titanium will show relatively high brightness colors after anodizing, such as silver, gold, copper, etc. On the other hand, the dark color of the trembling canopy usually needs to be anodized and dyed to achieve it.

Overall, anodizing can effectively improve the hardness and corrosion resistance of a material, as well as improve its aesthetics.

Summary. 1. First of all, place the object in the anodizing device, and clean the surface of the object to make it smooth. 2. Adjust the current of the power supply and determine the appropriate current value, so as to achieve a good gradient effect.

3. Output the current to the object, and constantly change the current size to realize the gradient color process. Note that this process requires that the change in current need to be gradual, not abrupt, to avoid excessive current changes that cause damage to the surface of the object. 4. Finally, take out the object, clean it with water, and give the gradient coating on the surface of the object a beautiful appearance.

1. First of all, place the object in the anodizing device, and clean the surface of the object to make it smooth. 2. Adjust the current of the power supply and determine the appropriate current value, so as to achieve a good gradient effect. 3. Output the current to the object, and constantly change the current size to realize the gradient color process.

Note that this process requires that the change in current be gradual, not abrupt, to avoid excessive current changes that may cause damage to the surface of the object. 4. Finally, take out the object, clean it with water, and complete a beautiful appearance with the hail gradient coating on the surface of the object.

Aluminum alloy is red and yellow, how to operate the gradient color.

1. First of all, use abrasives to remove the annihilating rock coating on the surface of the object to ensure the best gradient effect. 2. Then, use the appropriate current to place the object into the coating groove so that one end is close to the red paint and the other end is close to the yellow paint. 3. Then, slowly change the current to achieve a gradient from red to yellow.

Note that this process requires that the current change be gradual, not abrupt, to avoid damage to the surface of the object due to excessive changes in the current side cavity. 4. Finally, take out the object, clean it with water, and give the gradient coating on the surface of the object a beautiful appearance.

1. The process is different.

The natural color anode is achieved by electrolysis to achieve the desired color.

Anodizing is electrolyzed, through the oxide film for coloring, to achieve the color requirements of the mold, according to the requirements of the product to select the production process.

2. The face of the world is different.

Anodizing itself means that when the product is processed, the color of the final product is the same as the original, which is equivalent to the same.

Anodizing refers to the process of making paper that can be selected in a wide variety of colors.

3. The time is different.

The operation time of the natural anode is shorter.

Anodizing takes a relatively long time because it needs to be dyed.

Summary. 1. Make H2 with Zn and sulfuric acid

2. Pass H2 through the glass tube containing the AL pieces for a period of time to remove the air from it (prevent **) 3 Pass H2 through the glass tube with the AL pieces and heat it with an alcohol lamp until the red substance turns black.

4. Remove the alcohol lamp and continue to pass H2 (to prevent the burning al-piece from being oxidized again) 5. Remove the al-piece.

Two. Sandwork with sandpaper until shiny.

Aluminum alloy anodized fading remedy.

1. Use Zn and sulfuric acid to make H22 to remove the air from the glass tube containing the AL pieces for a period of time (to prevent the explosion of the Xun Cong Explosion) 3. Pass the H2 through the glass tube containing the AL parts, and heat it with an alcohol lamp until the red substance turns black in the whole acre, and the cherry blossoms turn black, 4. Remove the alcohol lamp and continue to pass H2 (to prevent the hot AL pieces from being oxidized again) 5. Take out the AL parts, and polish them with sandpaper until they are bright.

The anodizing is not well sealed, which is a quality problem.

Okay thank you!

1. The general principle of the formation of anodized aluminum plate oxide film:

The process of placing an aluminum plate as an anode in an electrolyte solution and using electrolysis to form an alumina film on its surface is called anodizing of aluminum plate. The cathode in the device is a material with high chemical stability in the electrolytic solution, such as lead, stainless steel, aluminum, etc. The principle of aluminum anodizing: the essence of the front wheel is the principle of water electrolysis.

When an electric current passes, on the cathode, hydrogen is released; On the anode, the precipitated oxygen is not only oxygen in the molecular state, but also atomic oxygen (O) and ionic oxygen, which is usually expressed as molecular oxygen in the reaction. The aluminum, which is the anode, is oxidized by the oxygen precipitated on it, forming an anhydrous alumina film, and the oxygen generated is not all interacted with the aluminum, and part of it is precipitated in the form of gaseous.

2. Selection of anodized aluminum plate oxidation electrolytic solution:

A prerequisite for the growth of anodized membranes is that the electrolyte should have a solubilizing effect on the oxide membranes. However, this does not mean that anodizing can produce an oxide film or the same properties of the oxide film in all dissolving electrolytes.

3. Types of anodized aluminum plate oxidation:

Anodizing is divided into direct current anodizing, alternating current anodizing, and pulse current anodizing. According to the electrolyte, there are:

Sulfuric acid, oxalic acid, chromic acid, mixed acids and natural coloring anodizing with sulfo organic acids as the main solution. According to the properties of the film layer, it is divided into: ordinary film, hard film (thick film), porcelain film, bright modification layer, semiconductor barrier layer and other anode silver oxidation.

The common anodizing methods and process conditions of aluminum and aluminum alloys are shown in Table 5. Among them, the application of direct current sulfuric acid anodic oxidation is the most common.

4. Structure and properties of anodized aluminum plate oxide film:

The anodized film consists of two layers, the porous thick outer layer that grows on top of a dense inner layer with dielectric properties, the latter called the barrier layer (also called the active layer). Observation and study with electron microscopy showed that almost all the longitudinal and horizontal planes of the film presented tubular pores perpendicular to the metal surface, which penetrated through the outer layer of the film until the barrier layer at the interface between the oxide film and the metal. Dense alumina around each pore as the main axis constitutes a honeycomb hexagonal body, called a unit cell, and the whole film layer is composed of countless such unit cells.

The barrier layer is composed of anhydrous alumina, which is thin and dense, with high hardness and the effect of blocking the passage of electric current. The thickness of the barrier layer is about , which is behind the total membrane. The porous outer layer of the oxide film is mainly composed of amorphous alumina and a small amount of hydrated alumina, in addition to the cation of the electrolyte.

When the electrolyte is sulfuric acid, the sulfate content in the film layer is 13%-17% under normal conditions. Most of the good properties of oxide films are determined by the thickness and porosity of the porous outer layer, which are closely related to anodizing conditions.