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Electrolytic coloring aluminum has good decorative, it is widely used at home and abroad, especially in the production of aluminum surface treatment of the most commonly used in the production. At present, the main process is electrolytic tinting with tin-nickel mixed salt, and the color of the product is mainly champagne. Compared with single nickel salt coloring, tin-nickel mixed salt electrolysis coloring products are bright in color and rich in color; the main problems Is the existence of product color, aluminum extrusion process and oxidation of the coloring process unreasonable will lead to product color.
The impact of extrusion process on the oxidation and coloring is mainly the influence of mold design, extrusion temperature, extrusion speed and cooling method on the surface state and the uniformity of the extrusion profile. Mold design should be able to fully blend the feed, otherwise prone to bright (dark) with defects, the same profile may appear on the color separation; the same time, the state of the mold and profile extrusion lines also affect the oxidation coloring. Extruded temperature, speed, cooling and cooling time are different, so that profiles are not uniform, but also produce color.
Anodic oxidation of electrolytic coloring has a very important role in the color, especially in the production of vertical oxidation line is prone to two-color, vertical oxidation tank depth 7.5m, the upper and lower tank temperature is easy to produce, the temperature is important for anodic oxidation , The temperature is high, the dissolution of the oxide film by the oxidation bath is aggravated, and the pore size of the surface of the porous anodic oxide film is increased. On the contrary, the pore size of the porous anodic oxide film is small. In addition, the temperature is high, the porosity of the anodized film is high, and conversely it is low. Electrolytic coloring is mainly the color of the metal ions in the oxide film within the pores of the barrier layer surface electrochemical reduction reaction, so that the metal ions in the coloring solution deposited on the bottom of the anodized film hole, the incident light scattering While showing a different color, the more material deposited in the micropore, the darker the color. Depositing the same amount of metal or metal compound on the parts with high and low temperature under the condition of the same electricity amount will have less deposits per hole for the parts with higher porosity and larger surface pore size, Shallow, on the contrary, darker colors, resulting in pigmented double color. In the anodic oxidation process, the conductivity of the oxide film will also cause the pigment produced color, the problem is mainly prone to horizontal production line, mainly due to oxidation of the blank before the oxidation process, the clamp material is not Tight, resulting in poor conductivity of individual materials, making the oxide film is relatively different, and then by color, it will produce color.
Electrolytic coloring process can be a direct response to the color difference problem, the electrolysis of the color liquid current distribution capacity of the uniform coloring of the pigment has a decisive impact, once the current distribution of uneven, it will cause significant color. The current distribution capacity of the bath is mainly related to the conductivity and the degree of polarization of the bath. Coloring liquid contains a certain conductive salt, mainly to improve the conductivity of the colored liquid, conductive salt added less than when the conductivity decreased, the ability to reduce the current distribution, it will cause color. In addition, the additive in the coloring solution will have characteristic adsorption, thereby increasing the degree of polarization. If the substance is consumed too much, the polarization degree of the electrolyte will decrease and the current distribution ability will decline, which will also cause color difference. In actual production, not only to improve the bath conductivity, but also to ensure that the conductive rod, copper seat has good conductivity, poor conductivity will cause uneven distribution of power lines, resulting in color.
These are mainly introduced the impact of the same chromatic aberration of the tank for several reasons, the anodizing and electrolytic coloring of the process parameters will lead to differences between the different chutes, so in the production to control the stability of the oxidation and coloring process , To ensure that the parameters of the same, thereby reducing the oxidation of pigment color problems appear.
1. Are you a factory or trade company?
We are factory and trade company
2. How many staff do you have?
We have 103 workers
3. What is your delivery time?
10-15 days for customized size. 3-5 days for our Stock size.
4. What is your price?
High quality products with reasonable price
5. What is the MOQ?
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8. What is necessary information?
In order to get accurate quotation, the standard, material, outer diameter, wall thickness, quantity, destination port are necessary information